CN117956358A - Earphone - Google Patents
Earphone Download PDFInfo
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- CN117956358A CN117956358A CN202310332886.9A CN202310332886A CN117956358A CN 117956358 A CN117956358 A CN 117956358A CN 202310332886 A CN202310332886 A CN 202310332886A CN 117956358 A CN117956358 A CN 117956358A
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- 230000004044 response Effects 0.000 description 71
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- 210000000624 ear auricle Anatomy 0.000 description 21
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- 230000001788 irregular Effects 0.000 description 10
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- 241000746998 Tragus Species 0.000 description 8
- 210000005069 ears Anatomy 0.000 description 7
- 230000006870 function Effects 0.000 description 7
- 235000021474 generally recognized As safe (food) Nutrition 0.000 description 6
- 235000021473 generally recognized as safe (food ingredients) Nutrition 0.000 description 6
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- Headphones And Earphones (AREA)
Abstract
The embodiment of the specification provides an earphone, which comprises a sound generating part and an ear hook, wherein the ear hook wears the sound generating part near an auditory canal but does not block an auditory canal opening, and the sound generating part and the auricle respectively have a first projection and a second projection on a sagittal plane; the centroid of the first projection and the highest point of the second projection have a first distance in the vertical axis direction, the first distance is in the range of 17mm-43mm, and the area range of the first projection is 202mm 2-560mm2. According to the earphone provided by the embodiment of the specification, at least part of the sound generating part is worn in the auricle area of the user or stretches into the concha cavity, so that the better sound effect at the ear canal opening of the user is ensured. In addition, the overall size of the sound generating part is smaller, and the vibration film of the sound generating part is not required to push excessive air, so that enough volume can be generated in the auditory canal of a user, and the sound generating efficiency of the sound generating part is improved.
Description
Cross reference
The present application claims priority to China application number 202211336918.4 filed on 10/28/2022, application number 202223239628.6 filed on 12/1/2022, application number PCT/CN2022/144339 filed on 30/2022, application number PCT/CN2023/079412 filed on 3/2023, and application number PCT/CN2023/079409 filed on 2/2023/3.
Technical Field
The application relates to the technical field of acoustics, in particular to an earphone.
Background
With the development of acoustic output technology, acoustic devices (e.g., headphones) have been widely used in daily life, and can be used with electronic devices such as mobile phones and computers, so as to provide users with hearing feast. The acoustic devices can be generally classified into head-wearing, ear-hanging, in-ear, and the like, according to the manner in which the user wears them. The common in-ear earphone in the current market needs to extend into the auditory canal of a user, and discomfort can be brought to the user after the in-ear earphone is worn for a long time.
Accordingly, there is a need to provide an earphone that can improve wearing comfort for a user and has a better output performance.
Disclosure of Invention
One of the embodiments of the present specification provides an earphone, including: the ear hook comprises a first part and a second part which are sequentially connected, the first part is hung between the auricle and the head of a user, the second part extends to the front outer side face of the auricle and is connected with the sound generating part, the sound generating part is worn near the auditory canal but at a position which does not block the auditory canal opening, and the sound generating part and the auricle are respectively provided with a first projection and a second projection on the sagittal plane. The centroid of the first projection and the highest point of the second projection have a first distance in the vertical axis direction, the first distance is in the range of 17mm-43mm, and the area range of the first projection is 202mm 2-560mm2. According to the earphone provided by the embodiment of the specification, at least part of the sound generating part is worn in the auricle area of the user or stretches into the concha cavity, so that the better sound effect at the ear canal opening of the user is ensured. Further, the sound producing part is worn on the position near the auditory meatus but not blocking the auditory meatus through the earhook, so that the auditory meatus of the user is communicated with the outside, the user can acquire sound information in the outside environment when wearing the earphone, and in the wearing state, the sound producing part cannot stretch into the auditory meatus of the user, thereby avoiding uncomfortable feeling brought by long-time wearing and improving the comfort of the user when wearing. In addition, the overall size of the sound generating part is smaller, and the vibration film of the sound generating part is not required to push excessive air, so that enough volume can be generated in the auditory canal of a user, and the sound generating efficiency of the sound generating part is improved.
Drawings
The application will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. The embodiments are not limiting, in which like numerals represent like structures, wherein:
FIG. 1 is a schematic illustration of an exemplary ear shown according to some embodiments of the present description;
FIG. 2 is an exemplary wearing schematic of headphones according to some embodiments of the present description;
FIG. 3 is a schematic illustration of the wearing of a sound emitting portion of an earphone extending into a concha cavity according to some embodiments of the present disclosure;
FIG. 4 is a schematic diagram of a cavity-like structure acoustic model according to some embodiments of the present description;
FIG. 5A is an exemplary wearing schematic of headphones according to some embodiments of the present description;
fig. 5B is an exemplary wearing schematic of headphones according to some embodiments of the present description;
FIG. 6 is a schematic diagram of a cavity-like structure according to some embodiments of the present description;
FIG. 7 is a plot of a listening index for a cavity-like structure having different sized leakage structures according to some embodiments of the present description;
FIG. 8 is a schematic diagram of an exemplary frequency response curve corresponding to different overlapping proportions of the projected area of the first projection and the projected area of the user's concha cavity on the sagittal plane, according to some embodiments of the present disclosure;
FIG. 9 is a schematic diagram of an exemplary frequency response curve corresponding to the dimension of the first projection in the long axis direction and the dimension in the short axis direction at different ratios according to some embodiments of the present disclosure;
fig. 10 is a plot of frequency response of a sound emitting portion having different dimensions in its thickness direction according to some embodiments of the present disclosure;
FIG. 11A is a schematic diagram of a different exemplary mating position of an earphone with a user's ear canal according to the present description;
FIG. 11B is a schematic view of a different exemplary mating position of an ear piece with a user's ear canal according to another embodiment of the present disclosure;
FIG. 11C is a schematic view of a different exemplary mating position of a headset with a user's ear canal according to yet another embodiment of the present disclosure;
FIG. 12 is a schematic diagram of exemplary frequency response curves corresponding to projections of the tip of the sound emitting portion in the sagittal plane and projections of the edge of the concha cavity in the sagittal plane at different distances according to some embodiments of the present disclosure;
FIG. 13A is a schematic diagram of an exemplary frequency response plot corresponding to the area of the first projection versus the area of the projection of the concha cavity on the sagittal plane at different overlap ratios, according to some embodiments of the present disclosure;
FIG. 13B is a schematic diagram of an exemplary frequency response plot corresponding to a centroid of a first projection and a centroid of a projection of an ear canal orifice on a sagittal plane at different distances, according to some embodiments of the present disclosure;
Fig. 14 is an exemplary wearing schematic diagram of headphones according to some embodiments of the present description;
fig. 15 is an exemplary wearing schematic diagram of headphones according to some embodiments of the present description;
Fig. 16A is an exemplary structural schematic diagram of a headset provided by some embodiments of the present description;
fig. 16B is a schematic diagram of a user wearing headphones provided in accordance with some embodiments of the present description;
Fig. 17 is an exemplary wearing schematic diagram of headphones according to further embodiments of the present description;
fig. 18 is an exemplary wearing schematic diagram of headphones according to further embodiments of the present description;
Fig. 19A is an exemplary wearing schematic diagram of an earphone according to other embodiments of the present disclosure;
fig. 19B is a schematic diagram of an earphone according to some embodiments of the present disclosure in an unworn state;
FIG. 20 is an exemplary wearing schematic of headphones according to further embodiments of the present description;
FIG. 21 is an exemplary wearing schematic diagram of a sound emitting portion of an earphone covering an antihelix region according to some embodiments of the present description;
FIG. 22 is an exemplary wearing schematic of headphones according to further embodiments of the present description;
FIG. 23 is an exemplary wearing schematic of headphones according to further embodiments of the present description;
FIG. 24 is a schematic diagram of exemplary frequency response curves corresponding to different overlapping ratios of the projected area of the first projection to the projected area of the user's concha cavity on the sagittal plane, according to some embodiments of the present disclosure;
FIG. 25A is a schematic view of a different exemplary mating position of an earphone with a user's ear canal according to one embodiment of the present disclosure;
FIG. 25B is a schematic view of a different exemplary mating position of an ear piece with a user's ear canal according to another embodiment of the present disclosure;
FIG. 25C is a schematic view of a different exemplary mating position of a headset with a user's ear canal according to yet another embodiment of the present disclosure;
FIG. 25D is a schematic view of a different exemplary mating position of a headset with a user's ear canal according to yet another embodiment of the present disclosure;
FIG. 25E is a schematic view of a different exemplary mating position of a headset with a user's ear canal according to yet another embodiment of the present disclosure;
FIG. 26 is a schematic diagram of exemplary frequency response curves corresponding to the projection of the tip of the sounding portion in the sagittal plane of FIG. 25E and the projection of the edge of the concha cavity in the sagittal plane at different distances;
FIG. 27A is a schematic diagram of an exemplary frequency response curve corresponding to a first projected area of the sound emitting portion on the sagittal plane and a projected area of the concha cavity on the sagittal plane at different overlapping ratios when the sound emitting portion does not extend into the concha cavity when the wearing scene is shown in other embodiments of the present disclosure;
Fig. 27B is a schematic diagram of exemplary frequency response curves corresponding to a centroid of a first projection of the sound generating portion on a sagittal plane and a centroid of a projection of the ear canal opening on the sagittal plane at different distances when the sound generating portion is not extended into a wearing scene of the concha cavity according to further embodiments of the present disclosure.
Detailed Description
In order to more clearly illustrate the technical solution of the embodiments of the present application, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is apparent that the drawings in the following description are only some examples or embodiments of the present application, and it is apparent to those of ordinary skill in the art that the present application may be applied to other similar situations according to the drawings without inventive effort. Unless otherwise apparent from the context of the language or otherwise specified, like reference numerals in the figures refer to like structures or operations.
Fig. 1 is a schematic illustration of an exemplary ear shown according to some embodiments of the present description. As shown in fig. 1, fig. 1 is a schematic diagram of an exemplary ear shown in accordance with some embodiments of the present application. Referring to fig. 1, ear 100 may include an external auditory canal 101, an concha cavity 102, an concha boat 103, a triangular fossa 104, an antitragus 105, an auricle 106, an auricle 107, an earlobe 108, an auricle foot 109, an outer contour 1013, and an inner contour 1014. For convenience of description, the upper and lower antihelix feet 1011 and 1012 and the antihelix 105 are collectively referred to as the antihelix region in the embodiment of the present specification. In some embodiments, stability of the acoustic device wear may be achieved by support of the acoustic device by one or more portions of the ear 100. In some embodiments, the external auditory meatus 101, the concha cavity 102, the concha boat 103, the triangular fossa 104 and other parts have a certain depth and volume in the three-dimensional space, and can be used for realizing the wearing requirement of the acoustic device. For example, an acoustic device (e.g., an in-ear earphone) may be worn in the external auditory canal 101. In some embodiments, the wearing of the acoustic device may be accomplished by other portions of the ear 100 than the external auditory canal 101. For example, the wearing of the acoustic device may be accomplished by means of a concha 103, triangular fossa 104, antihelix 105, arhat 106, or auricle 107, or a combination thereof. In some embodiments, to improve the comfort and reliability of the acoustic device in terms of wearing, the earlobe 108 of the user may be further utilized. By enabling the wearing of the acoustic device and the propagation of sound by other parts of the ear 100 than the external auditory meatus 101, the external auditory meatus 101 of the user can be "liberated". When the user wears the acoustic device (earphone), the acoustic device does not block the external auditory meatus 101 of the user, and the user can receive both sound from the acoustic device and sound from the environment (e.g., whistling, ringing, surrounding sounds, traffic sounds, etc.), so that the occurrence probability of traffic accidents can be reduced. In some embodiments, the acoustic device may be designed in a configuration that is compatible with the ear 100, depending on the configuration of the ear 100, to enable wearing of the sound emitting portion of the acoustic device at different locations of the ear. For example, where the acoustic device is a headset, the headset may include a suspension structure (e.g., an ear hook) and a sound emitting portion physically coupled to the suspension structure, and the suspension structure may be adapted to the shape of the auricle to place the entire or partial structure of the ear sound emitting portion on the front side of the auricle 109 (e.g., region J surrounded by a dashed line in FIG. 1). For another example, when the user wears the earphone, the entire or partial structure of the sound emitting portion may be in contact with the upper portion of the external auditory canal 101 (for example, a position where one or more portions of the auricle 109, the concha 103, the triangular fossa 104, the antitragus 105, the auricle 106, the auricle 107, and the like are located). For another example, when the user wears the headset, the entire or partial structure of the sound emitting portion may be located within a cavity (e.g., the area M 1 enclosed by the dashed lines in fig. 1 that includes at least the concha 103, the triangular fossa 104, and the area M 2 that includes at least the concha 102) formed by one or more portions of the ear (e.g., the concha 102, the concha 103, the triangular fossa 104, etc.).
Individual differences may exist for different users, resulting in different size differences in the shape, size, etc. of the ears. For ease of description and understanding, the present specification will further describe the manner in which the acoustic devices of the various embodiments are worn on an ear model having a "standard" shape and size, unless otherwise indicated, primarily by reference to that ear model. For example, simulators made based on ANSI: S3.36, S3.25 and IEC:60318-7 standards, such as GRAS KEMAR, HEAD diagnostics, B & K4128 series, or B & K5128 series, with the HEAD and its (left and right) ears, can be used as references for wearing acoustic devices, thereby presenting a scenario where most users wear acoustic devices normally. Taking GRAS KEMAR as an example, the simulator of the ear may be any of GRAS 45AC, GRAS 45BC, GRAS 45CC, GRAS43AG, or the like. Taking the HEAD physics as an example, the simulator of the ear can be any of HMS II.3, HMS II.3LN, or HMS II.3LN HEC, etc. It should be noted that the data ranges measured in the examples of this specification are measured on the basis of GRAS 45BC KEMAR, but it should be understood that there may be differences between different head models and ear models, and that there may be + -10% fluctuation in the relevant data ranges when using other models. For example only, the ear model as a reference may have the following relevant features: the dimension of the projection of the auricle on the sagittal plane in the vertical axis direction may be in the range of 55-65mm, and the dimension of the projection of the auricle on the sagittal plane in the sagittal axis direction may be in the range of 45-55 mm. The projection of the auricle in the sagittal plane refers to the projection of the edge of the auricle in the sagittal plane. The edge of auricle is composed of at least the external contour of auricle, the auricle contour, the tragus contour, the inter-screen notch, the opposite-screen tip, the trabecular notch and the like. Accordingly, in the present application, descriptions such as "user wearing", "in wearing state", and "in wearing state" may refer to the acoustic device of the present application being worn on the ear of the aforementioned simulator. Of course, in consideration of individual differences among different users, the structure, shape, size, thickness, etc. of one or more portions of the ear 100 may be differently designed according to the ear of different shapes and sizes, and these differently designed may be represented as characteristic parameters of one or more portions of the acoustic device (e.g., sound emitting portion, ear hook, etc. hereinafter) may have different ranges of values, thereby accommodating different ears.
It should be noted that: in the medical, anatomical, etc. fields, three basic slices of the sagittal (SAGITTAL PLANE), coronal (Coronal Plane) and Horizontal (Horizontal Plane) Plane of the human body and three basic axes of the sagittal (Sagittal Axis), coronal (Coronal Axis) and Vertical (Vertical Axis) axes may be defined. The sagittal plane is a section perpendicular to the ground and is divided into a left part and a right part; the coronal plane is a tangential plane perpendicular to the ground and is formed along the left-right direction of the body, and divides the human body into a front part and a rear part; the horizontal plane refers to a section parallel to the ground, which is taken in the vertical direction perpendicular to the body, and divides the body into upper and lower parts. Accordingly, the sagittal axis refers to an axis along the anterior-posterior direction of the body and perpendicular to the coronal plane, the coronal axis refers to an axis along the lateral direction of the body and perpendicular to the sagittal plane, and the vertical axis refers to an axis along the superior-inferior direction of the body and perpendicular to the horizontal plane. Further, the front side of the ear according to the present application is located along the sagittal axis and on the side of the ear facing the facial area of the human body. The front outline schematic diagram of the ear shown in fig. 1 can be obtained by observing the ear of the simulator along the direction of the coronal axis of the human body.
The above description of the ear 100 is for illustrative purposes only and is not intended to limit the scope of the present application. Various changes and modifications may be made by one of ordinary skill in the art in light of the description of the application. For example, a part of the structure of the acoustic device may shield part or all of the external auditory meatus 101. Such variations and modifications are intended to be within the scope of the present application.
Fig. 2 is an exemplary wearing schematic diagram of headphones according to some embodiments of the present description. As shown in fig. 2, the earphone 10 may include a sound emitting portion 11 and a hanging structure 12. In some embodiments, the earphone 10 may wear the sound emitting portion 11 on the user's body (e.g., the head, neck, or upper torso of a human body) through the suspension structure 12. In some embodiments, the hanging structure 12 may be an ear hook, and the sound emitting portion 11 is connected to one end of the ear hook, and the ear hook may be configured to fit the ear of the user. For example, the earhook may be an arcuate structure. In some embodiments, the suspension structure 12 may also be a gripping structure that fits around the pinna of the user so that the suspension structure 12 may grip at the pinna of the user. In some embodiments, the hanging structure 12 may include, but is not limited to, an ear hook, an elastic band, etc., so that the earphone 10 may better hang on the user, preventing the user from falling off during use.
In some embodiments, the sound emitting portion 11 may be adapted to be worn on the body of the user, and a speaker may be provided within the sound emitting portion 11 to generate sound for input to the user's ear 100. In some embodiments, the earphone 10 may be combined with glasses, headphones, a head mounted display device, an AR/VR helmet, or the like, in which case the sound emitting portion 11 may be worn in a hanging or clamping manner near the user's ear 100. In some embodiments, the sound emitting portion 11 may be circular, oval, polygonal (regular or irregular), U-shaped, V-shaped, semicircular, so that the sound emitting portion 11 may hang directly against the user's ear 100.
In conjunction with fig. 1 and 2, in some embodiments, at least a portion of sound producing portion 11 may be located in fig. 1 at an area J on the anterior side of the tragus or anterolateral area M 1 and area M 2 of the pinna in user's ear 100 when the user wears headset 10. The following will exemplify the different wearing positions (11A, 11B, and 11C) of the sound emitting portion 11. In the embodiments of the present disclosure, the front lateral surface of the auricle refers to a side of the auricle facing away from the head in the coronal axis direction, and the rear medial surface of the auricle refers to a side of the auricle facing toward the head in the coronal axis direction. In some embodiments, the sound emitting portion 11A is located on a side of the user's ear 100 facing the human face region in the sagittal axis direction, i.e., the sound emitting portion 11A is located on the human face region J on the front side of the ear 100. Further, a speaker is provided inside the housing of the sound emitting portion 11A, and at least one sound emitting hole (not shown in fig. 2) may be provided on the housing of the sound emitting portion 11A, and the sound emitting hole may be located on a side wall of the housing of the sound emitting portion facing or near the external auditory meatus 101 of the user, and the speaker may output sound to the external auditory meatus 101 of the user through the sound emitting hole. In some embodiments, the speaker may include a diaphragm, the cavity inside the housing of the sound generating part 11 is at least divided into a front cavity and a rear cavity by the diaphragm, the sound outlet is acoustically coupled with the front cavity, the vibration of the diaphragm drives the air vibration of the front cavity to generate air guiding sound, and the air guiding sound generated by the front cavity propagates to the outside through the sound outlet. In some embodiments, the casing of the sound generating portion 11 may further include one or more pressure relief holes, where the pressure relief holes may be located on a side wall of the casing adjacent to or opposite to a side wall where the sound generating holes are located, the pressure relief holes are acoustically coupled to the rear cavity, and the vibrating diaphragm vibrates and drives air in the rear cavity to vibrate to generate air guiding sound, so that the air guiding sound generated in the rear cavity can be transmitted to the outside through the pressure relief holes. Illustratively, in some embodiments, the speaker within the sound generating portion 11A may output sound having a phase difference (e.g., opposite phase) through the sound outlet and the pressure relief hole, the sound outlet may be located on a side wall of the housing of the sound generating portion 11A facing the external auditory meatus 101 of the user, the pressure relief hole may be located on a side of the housing of the sound generating portion 11 facing away from the external auditory meatus 101 of the user, at which time the housing may function as a baffle, increasing a sound path difference of the sound outlet and the pressure relief hole to the external auditory meatus 101 to increase a sound intensity at the external auditory meatus 101, and simultaneously decreasing a volume of far-field leakage sound. In some embodiments, the sound emitting portion 11 may have a long axis direction Y and a short axis direction Z perpendicular to the thickness direction X and orthogonal to each other. The long axis direction Y may be defined as a direction having a maximum extension (for example, a long axis direction, that is, a long direction of a rectangle or an approximately rectangle when the projected shape is a rectangle or an approximately rectangle) among the shapes of the two-dimensional projection surfaces of the sound generating section 11 (for example, a projection of the sound generating section 11 on a plane on which the outer side surface thereof is located, or a projection on a sagittal plane), and the short axis direction Z may be defined as a direction perpendicular to the long axis direction Y among the shapes of the sound generating section 11 projected on the sagittal plane (for example, a short axis direction, that is, a width direction of a rectangle or an approximately rectangle when the projected shape is a rectangle or an approximately rectangle). The thickness direction X may be defined as a direction perpendicular to the two-dimensional projection plane, e.g., a direction coincident with the coronal axis, both pointing in a direction to the left and right of the body. In some embodiments, when the sound generating portion 11 is in an inclined state in the wearing state, the long axis direction Y is still parallel or approximately parallel to the sagittal plane, and the long axis direction Y may have an angle with the sagittal axis direction, that is, the long axis direction Y is also correspondingly inclined, and the short axis direction Z may have an angle with the vertical axis direction, that is, the short axis direction Z is also inclined, as in the wearing situation of the sound generating portion 11B shown in fig. 2. In some embodiments, the entire or partial structure of the sound emitting portion 11B may extend into the concha cavity, that is, the projection of the sound emitting portion 11B onto the sagittal plane has a portion that overlaps with the projection of the concha cavity onto the sagittal plane. For the specific content of the sound emitting portion 11B, reference may be made to the content elsewhere in the specification, for example, fig. 3 and the corresponding specification content thereof. In some embodiments, the sounding part 11 may be in a horizontal state or an approximately horizontal state in the wearing state, as shown in the sounding part 11C of fig. 2, the long axis direction Y may be consistent or approximately consistent with the sagittal axis direction, and both point in the front-back direction of the body, and the short axis direction Z may be consistent or approximately consistent with the vertical axis direction, and both point in the up-down direction of the body. Note that, in the wearing state, the sound emitting portion 11C being in an approximately horizontal state may mean that an angle between the long axis direction Y of the sound emitting portion 11C and the sagittal axis shown in fig. 2 is within a specific range (for example, not more than 20 °). The wearing position of the sound emitting portion 11 is not limited to the sound emitting portion 11A, the sound emitting portion 11B, and the sound emitting portion 11C shown in fig. 2, and may satisfy the region J, the region M 1, or the region M 2 shown in fig. 1. For example, the sounding part 11 may be wholly or partially structured in a region J surrounded by a broken line in fig. 1. For another example, the entire or partial structure of the sound emitting portion may be in contact with one or more portions of the ear 100, such as the auricle 109, the concha 103, the triangular fossa 104, the antitragus 105, the auricle 106, and the auricle 107. As another example, the entire or partial structure of the sound emitting portion 11 may be located within a cavity (e.g., the area M 1 enclosed by the dashed lines in fig. 1 that includes at least the concha 103, the triangular fossa 104, and the area M 2 that includes at least the concha 102) formed by one or more portions of the ear 100 (e.g., the concha 102, the concha 103, the triangular fossa 104, etc.).
To improve the stability of the earphone 10 in the worn state, the earphone 10 may employ any one of the following or a combination thereof. First, at least a portion of the suspension structure 12 is configured as a contoured structure that conforms to at least one of the posterior medial side of the pinna and the head to increase the contact area of the suspension structure 12 with the ear and/or head, thereby increasing the resistance to the acoustic device 10 falling off of the ear. Secondly, at least part of the suspension structure 12 is configured as an elastic structure, so that the suspension structure has a certain deformation amount in a wearing state, so as to increase the positive pressure of the suspension structure 12 on the ear and/or the head, thereby increasing the resistance of the earphone 10 falling off from the ear. Third, the suspension structure 12 is at least partially configured to rest against the ear and/or the head in a worn state, such that it forms a reaction force against the ear, such that the sound-emitting portion 11 is pressed against the front outer side of the auricle (e.g., the region M 1 and the region M 2 shown in fig. 1), thereby increasing the resistance to the earphone 10 coming off the ear. Fourth, the sounding part 11 and the hanging structure 12 are provided to clamp the antitragus region, the concha region, etc. from both sides of the front outer side and the rear inner side of the auricle in a wearing state, thereby increasing the resistance of the earphone 10 coming off from the ear. Fifthly, the sounding part 11 or the structure connected with the sounding part is arranged to extend into the cavities of the concha cavity 102, the concha boat 103, the triangular fossa 104, the ear boat 106 and the like at least partially, so that the resistance of the acoustic earphone 10 falling off from the ear is increased.
Illustratively, in connection with fig. 3, in the worn state, the tip FE (also referred to as the free end) of the sound emitting portion 11 may protrude into the concha cavity. Alternatively, the sounding part 11 and the hanging structure 12 may be configured to clamp the aforementioned ear area from both front and rear sides of the ear area corresponding to the concha cavity together, thereby increasing resistance of the earphone 10 to falling off from the ear, and further improving stability of the earphone 10 in a worn state. For example, the distal end FE of the sound emitting portion is pressed in the concha cavity in the thickness direction X. For another example, the distal end FE abuts within the concha cavity in the long axis direction Y and/or the short axis direction Z (e.g., abuts an inner wall of an opposite distal end FE of the concha cavity). The end FE of the sound emitting portion 11 is an end portion of the sound emitting portion 11 that is disposed opposite to the fixed end connected to the suspension structure 12, and is also referred to as a free end. The sound emitting portion 11 may be a regular or irregular structure, and is exemplified here for further explanation of the end FE of the sound emitting portion 11. For example, when the sounding part 11 has a rectangular parallelepiped structure, the end wall surface of the sounding part 11 is a flat surface, and at this time, the end FE of the sounding part 11 is an end side wall of the sounding part 11 that is disposed opposite to the fixed end connected to the suspension structure 12. For another example, when the sound emitting portion 11 is a sphere, an ellipsoid, or an irregular structure, the end FE of the sound emitting portion 11 may refer to a specific area obtained by cutting the sound emitting portion 11 along the Y-Z plane (a plane formed by the short axis direction Z and the thickness direction X) and away from the fixed end, and the ratio of the size of the specific area along the long axis direction Y to the size of the sound emitting portion along the long axis direction Y may be 0.05 to 0.2.
By extending the sound emitting portion 11 at least partially into the concha cavity, the volume of sound at the listening position (e.g., at the ear canal opening), particularly at medium and low frequencies, can be increased while still maintaining a good far-field leakage cancellation effect. By way of example only, when the entire or partial structure of the sound-emitting portion 11 extends into the concha chamber 102, the sound-emitting portion 11 and the concha chamber 102 form a chamber-like structure (hereinafter simply referred to as a chamber-like structure), which in the illustrated embodiment may be understood as a semi-closed structure enclosed by the side walls of the sound-emitting portion 11 together with the concha chamber 102 structure, which semi-closed structure provides that the listening position (e.g., at the ear canal opening) is not completely sealed from the external environment, but has a leakage structure (e.g., openings, slits, pipes, etc.) that is in acoustic communication with the external environment. When the user wears the earphone 10, one or more sound outlet holes may be disposed on a side of the housing of the sound generating part 11, which is close to or faces the ear canal of the user, and one or more pressure relief holes may be disposed on other side walls (for example, side walls away from or facing away from the ear canal of the user) of the housing of the sound generating part 11, where the sound outlet holes are acoustically coupled with the front cavity of the earphone 10, and the pressure relief holes are acoustically coupled with the rear cavity of the earphone 10. Taking the sounding part 11 including a sounding hole and a pressure release hole as examples, the sound output by the sounding hole and the sound output by the pressure release hole can be approximately regarded as two sound sources, the sound phases of the two sound sources are opposite to form a dipole, the inner wall corresponding to the sounding part 11 and the concha cavity 102 forms a cavity-like structure, wherein the sound source corresponding to the sounding hole is located in the cavity-like structure, and the sound source corresponding to the pressure release hole is located outside the cavity-like structure, so as to form the acoustic model shown in fig. 4. As shown in fig. 4, a listening position and at least one sound source 401A may be contained in the cavity-like structure 402. "comprising" herein may mean that at least one of the listening position and the sound source 401A is inside the cavity-like structure 402, or that at least one of the listening position and the sound source 401A is at an inner edge of the cavity-like structure 402. The listening position may be equivalent to the ear canal opening of the ear, or may be an ear acoustic reference point, such as ERP, DRP, etc., or may be an entry structure leading to the listener, etc. The sound source 401B is located outside the cavity-like structure 402 and the opposite phase sound sources 401A and 401B constitute a dipole. The dipoles radiate sound to the surrounding space respectively and generate interference cancellation phenomena of sound waves, so that the effect of cancellation of sound leakage is realized. Since the difference in sound path between the two sounds is larger at the listening position, the effect of sound cancellation is relatively insignificant, and a larger sound can be heard at the listening position than at other positions. Specifically, since the sound source 401A is surrounded by the cavity-like structure 402, most of the sound radiated therefrom reaches the listening position by direct or reflected light. In contrast, without the cavity-like structure 402, the sound source 401A radiates sound that does not mostly reach the listening position. Thus, the provision of the cavity-like structure 402 results in a significant increase in the volume of sound reaching the listening position. At the same time, only a small portion of the inverted sound radiated from the inverted sound source 401B outside the cavity-like structure 402 enters the cavity-like structure 402 through the leakage structure 403 of the cavity-like structure 402. This corresponds to the creation of a secondary sound source 401B' at the leak structure 403, which has a significantly smaller intensity than the sound source 401B and also significantly smaller intensity than the sound source 401A. The sound generated by the secondary sound source 401B' has a weak effect of anti-phase cancellation on the sound source 401A in the cavity, so that the volume of the sound at the sound listening position is remarkably increased. For leaky sound, the sound source 401A radiates sound to the outside through the leaky structure 403 of the cavity, which is equivalent to generating one secondary sound source 401A 'at the leaky structure 403, since almost all sound radiated by the sound source 401A is output from the leaky structure 403 and the dimensions of the cavity-like structure 402 are much smaller (differ by at least an order of magnitude) than the spatial dimensions of the estimated leaky sound, the intensity of the secondary sound source 401A' can be considered to be equivalent to the sound source 401A. The sound cancellation effect of the secondary sound source 401A' and the sound source 401B is equivalent to the sound cancellation effect of the sound source 401A and the sound source 401B with respect to the external space. Namely, under the structure of the cavity, the equivalent sound leakage reducing effect is still maintained.
In a specific application scenario, the outer wall surface of the shell of the sound generating part 11 is usually a plane or a curved surface, and the outline of the concha cavity of the user is of an uneven structure, a cavity-like structure communicated with the outside is formed between the outline of the sound generating part 11 and the outline of the concha cavity by extending part 11 or the whole structure into the concha cavity, further, the sound outlet is arranged at the position, facing the ear canal opening of the user, of the shell of the sound generating part and close to the edge of the concha cavity, and the pressure relief hole is arranged at the position, facing away from or far away from the ear canal opening, of the sound generating part 11, so that the acoustic model shown in fig. 4 can be constructed, and the sound volume of the sound receiving position of the user at the ear opening can be improved when the user wears the earphone, and the far-field sound leakage effect can be reduced.
Fig. 5A and 5B are exemplary wearing schematic diagrams of headphones according to some embodiments of the present description.
In some embodiments, the sound emitting portion of the earphone may include a transducer and a housing containing the transducer, wherein the transducer is an element that receives an electrical signal and converts it to a sound signal for output. In some embodiments, the types of transducers may include low frequency (e.g., 30 Hz-150 Hz) speakers, medium low frequency (e.g., 150 Hz-500 Hz) speakers, medium high frequency (e.g., 500 Hz-5 kHz) speakers, high frequency (e.g., 5 kHz-16 kHz) speakers, or full frequency (e.g., 30 Hz-16 kHz) speakers, or any combination thereof, differentiated by frequency. The low frequency, the high frequency, and the like herein represent only the approximate range of frequencies, and may have different division schemes in different application scenarios. For example, a frequency division point may be determined, where a low frequency indicates a frequency range below the frequency division point and a high frequency indicates a frequency above the frequency division point. The crossover point may be any value within the audible range of the human ear, e.g., 500Hz,600Hz,700Hz,800Hz,1000Hz, etc.
In some embodiments, the transducer may include a diaphragm. When the diaphragm vibrates, sound may be emitted from the front and rear sides of the diaphragm, respectively. In some embodiments, a front cavity (not shown) for transmitting sound is provided in the housing 120 at a location on the front side of the diaphragm. The front cavity is acoustically coupled to the sound outlet aperture, and sound from the front side of the diaphragm may be emitted from the sound outlet aperture through the front cavity. A rear chamber (not shown) for transmitting sound is provided in the housing 120 at a position of the rear side of the diaphragm. The rear chamber is acoustically coupled with the pressure relief hole, and sound at the rear side of the diaphragm can be emitted from the pressure relief hole through the rear cavity.
Referring to fig. 3, which illustrates an ear hook as one example of the hanging structure 12, in some embodiments, the ear hook may include a first portion 121 and a second portion 122 connected in sequence, wherein the first portion 121 may be hung between a rear inner side of an auricle of a user and a head, and the second portion 122 may extend toward a front outer side of the auricle (a side of the auricle facing away from a head of a human body in a coronal axis direction) and connect the sound emitting portion 11, so that the sound emitting portion 11 is worn near an ear canal of the user but does not block the ear canal opening. In some embodiments, the sound outlet may be formed in a side wall of the housing of the sound generating part 11 facing the auricle, so that the sound generated by the transducer is guided out of the housing and then is transmitted to the ear canal opening of the user.
In conjunction with fig. 3 and 5A, in some embodiments, when the earphone 10 is worn by a user, the sound generating portion 11 has a first projection on a sagittal plane (i.e., a plane formed by the T axis and the S axis in fig. 5A) along the coronal axis direction R, the shape of the sound generating portion 11 may be a regular or irregular three-dimensional shape, correspondingly, when the first projection of the sound generating portion 11 on the sagittal plane is a regular or irregular shape, for example, when the shape of the sound generating portion 11 is a cuboid, or cylinder, the first projection of the sound generating portion 11 on the sagittal plane may be a rectangle or rectangle (e.g., a racetrack shape), and, considering that the first projection of the sound generating portion 11 on the sagittal plane may be an irregular shape, for convenience of describing the first projection, a rectangular area indicated by a solid line P may be defined around the sound generating portion 11 projection (i.e., the first projection) shown in fig. 5A and 5B, and the centroid O of the rectangular area indicated by the solid line P may be approximately regarded as the centroid of the first projection. It should be noted that the above description about the first projection and the centroid thereof is only an example, and the shape of the first projection relates to the shape of the sound emitting portion 11 or the wearing condition of the opposite ear. The pinna has a second projection on the sagittal plane along the coronal axis R. In order to enable the sound emitting hole of the sound emitting part 11 to be close to the ear canal opening in the wearing state of the earphone 10 to improve the sound effect of the ear canal opening of the user, in some embodiments, a distance h 1 (also referred to as a first distance) between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction (for example, the T-axis direction shown in fig. 5A) may be between 17mm and 43mm, at this time, at least part of the sound emitting part 11 may be located in the antitragus region of the user or extend into the concha cavity of the user, so that the sound emitting hole of the sound emitting part 11 may be close to the ear canal opening of the user, thereby ensuring that the ear canal opening of the user has a better sound effect. On the basis, the diaphragm of the sound generating part is not required to push excessive air, so that sufficient volume can be generated in the auditory canal of the user. In some embodiments, the size of the diaphragm in the sound emitting portion may be reduced to reduce the overall size of the sound emitting portion 11. In addition, an excessively large size of the sound emitting portion 11 may increase the weight of the sound emitting portion 11 itself to affect the comfort of wearing by the user. Based on this, in some embodiments, the area of the first projection may be between 202mm 2-560mm2. Preferably, the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction may be between 19mm and 40mm, the area of the first projection of the sounding part 11 on the sagittal plane may be 220mm 2-500mm2, and here, by narrowing the range of the first distance, the sounding part 11 does not completely cover the ear canal opening of the user, and at the same time, the sounding opening of the sounding part 11 is ensured to be closer to the ear canal opening of the user, and the sounding part 11 and the vibrating diaphragm are small in size, so that the sounding efficiency of the sounding part is improved, the weight of the sounding part 11 is reduced, and the wearing comfort of the user is improved. More preferably, the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction may be between 21mm and 35mm, and the area of the first projection of the sound generating part 11 on the sagittal plane may be 300mm 2-470 mm2, where by further narrowing the range of the first distance, the sound outlet of the sound generating part 11 is made closer to the ear canal opening of the user while the ear canal opening of the user remains in a sufficiently open state. In addition, the sizes of the sound generating part 11 and the vibrating diaphragm are further optimized, on the premise that the assembly of the internal elements of the sound generating part 11 is met, the sound generating efficiency of the sound generating part is improved, the weight of the sound generating part 11 is within a reasonable range, and the wearing comfort of a user is guaranteed. Based on the description of the above effects, it is further preferable that the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction may be between 25mm and 31mm, and the area of the first projection of the sounding part 11 on the sagittal plane may be 330mm 2-440 mm2.
In some embodiments, the sound generating portion 11 and the suspension structure 12 may be two independent structures or an integrally formed structure. In order to more clearly describe the first projection area of the sound emitting portion, a thickness direction X, a long axis direction Y, and a short axis direction Z are introduced here according to the three-dimensional structure of the sound emitting portion 11, wherein the long axis direction Y and the short axis direction Z are perpendicular, and the thickness direction X is perpendicular to a plane formed by the long axis direction Y and the short axis direction Z. By way of example only, the solid line box P is identified by identifying two points of the sound emitting portion 11 furthest apart in the long axis direction Y, and passing the two points as a first line segment and a second line segment parallel to the short axis direction Z, respectively. Two points farthest apart in the short axis direction Z of the sound emitting portion 11 are determined, and a third line segment and a fourth line segment parallel to the long axis direction Y are respectively made across the two points, and a rectangular region of the solid line frame P shown in fig. 5A and 5B can be obtained from the region formed by the above line segments.
In some embodiments, the distance w 1 (also referred to as the second distance) of the centroid O of the first projection from the end point of the second projection in the sagittal axis direction (e.g., the S-axis direction shown in fig. 5A) may be between 20mm-36 mm. Where the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal axis direction is controlled to be between 20mm and 36mm and the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction is controlled to be between 17mm and 43mm, a portion or the entire structure of the sound emitting portion 11 may substantially cover the antitragus region of the user (e.g., the position at the triangle fossa, the upper lobe, the lower lobe of the antitragus, or the antitragus, the position of the sound emitting portion 11C with respect to the ear shown in fig. 2) or a portion or the entire structure of the sound emitting portion 11 may protrude into the concha cavity (e.g., the position of the sound emitting portion 11B with respect to the ear shown in fig. 2). In some embodiments, the position of the sound emitting portion relative to the auricle may be further represented by a ratio of a distance of a centroid of the first projection to a highest point of the second projection to a height of the second projection on a vertical axis and a ratio of a distance of the centroid of the first projection to an ending point of the second projection to a width of the second projection on a sagittal axis. Taking the dimension of the auricle model as an example, the dimension of the second projection on the vertical axis is 71.33mm, the dimension of the second projection on the sagittal axis is 50.4mm, the ratio of the distance h 1 between the centroid O of the first projection and the highest point of the second projection on the vertical axis to the height h between the centroid O of the first projection and the second projection on the vertical axis is 0.25-0.6, and the ratio of the distance w 1 between the centroid O of the first projection and the end point of the second projection on the sagittal axis to the width w of the second projection on the sagittal axis is 0.4-0.7. Preferably, the ratio of the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction to the height h of the second projection in the vertical axis direction is between 0.3 and 0.56, and the ratio of the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal axis direction to the width w of the second projection in the sagittal axis direction is between 0.45 and 0.65. More preferably, the ratio of the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction to the height h of the second projection in the vertical axis direction is between 0.35 and 0.5, and the ratio of the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal axis direction to the width w of the second projection in the sagittal axis direction is between 0.5 and 0.6. More preferably, the ratio of the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction to the height h of the second projection in the vertical axis direction is between 0.4 and 0.5, and the ratio of the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal axis direction to the width w of the second projection in the sagittal axis direction is between 0.52 and 0.58.
It should be noted that, in the embodiment of the present disclosure, the highest point of the second projection may be understood as a point with the greatest distance in the vertical axis direction from the projection on the sagittal plane of a certain point of the neck of the user among all the projection points, that is, the projection of the highest point of the auricle (for example, the point A1 in fig. 5A) on the sagittal plane is the highest point of the second projection. The lowest point of the second projection may be understood as the point of which the distance in the vertical axis direction of the projection on the sagittal plane is smallest with respect to a certain point of the user's neck among all the projection points, that is, the projection of the lowest point of the auricle (for example, the point A2 in fig. 5A) on the sagittal plane is the lowest point of the second projection. The height of the second projection in the vertical axis direction is the difference between the point at which the distance in the vertical axis direction between the projection on the sagittal plane of a certain point of the neck of the user in all the projection points in the second projection is the largest and the point at which the distance in the vertical axis direction is the smallest (height h shown in fig. 5A), that is, the distance in the vertical axis T direction between the point A1 and the point A2. The end point of the second projection may be understood as the point of which all projection points are most distant in the sagittal axis direction with respect to the projection of the tip of the nose of the user onto the sagittal plane, that is, the projection of the end point of the auricle (for example, the point B1 shown in fig. 5A) onto the sagittal plane is the end point of the second projection. The front end point of the second projection may be understood as the point whose distance in the sagittal axis direction is smallest with respect to the projection of the tip of the nose of the user onto the sagittal plane, that is, the projection of the front end point of the auricle (for example, the point B2 shown in fig. 5A) onto the sagittal plane is the front end point of the second projection. The width of the second projection in the sagittal direction is the difference between the point at which the distance in the sagittal direction is largest and the point at which the distance in the sagittal direction is smallest (width w shown in fig. 5A) with respect to the projection of the tip of the nose on the sagittal plane in all the projection points of the second projection, that is, the distance between the point B1 and the point B2 in the sagittal direction S. In the present embodiment, the projection of the sound emitting portion 11, the auricle, or the like on the sagittal plane refers to the projection on the sagittal plane along the coronal axis R, and the description will not be repeated.
In some embodiments, in order for the entire or partial structure of the sound emitting portion 11 to cover the user's anthelix region (e.g., the position of the triangle fossa, the anthelix superior foot, the anthelix inferior foot, or the anthelix), for example, the position of the sound emitting portion 11C relative to the ear shown in fig. 2, the distance h 1 of the centroid O of the first projection from the highest point of the second projection in the vertical axis direction may be in the range of 17mm-29mm, the distance w 1 of the centroid O of the first projection from the end point of the second projection in the sagittal axis direction may be in the range of 20mm-31mm, and correspondingly, at this time, the ratio of the distance h 1 of the centroid O of the first projection from the highest point of the second projection in the vertical axis direction to the height h of the second projection in the vertical axis direction is in the range of 0.25-0.4, and the ratio of the distance w 1 of the centroid O of the first projection from the end point of the second projection in the sagittal axis direction to the width w of the second projection is in the range of 0.4-0.6. Preferably, in some embodiments, the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction may be in the range of 17mm-25mm, the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal axis direction may be in the range of 21mm-31mm, correspondingly, the ratio between the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction and the height h of the second projection in the vertical axis direction may be between 0.25-0.35, the ratio between the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal axis direction and the width w of the second projection in the sagittal axis direction may be between 0.42-0.6, at this time, more parts of the sound generating part 11 may be in contact with the antitragus region, in particular with the upper foot of the antitragus, the lower foot of the antitragus and the triangular fossa, the sound generating part 11 may form a stronger sound volume of the sound generating part of the inner wheel, and the sound generating part of the sound generating part is significantly reduced between the sound generating part of the inner wheel and the end of the sound generating part of the ear, and the sound generating part of the sound generating part is significantly reduced at the end of the sound generating part is significantly reduced. More preferably, the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction may be in the range of 17mm-24mm, the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal axis direction may be in the range of 21mm-28mm, correspondingly, the ratio of the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction and the height h of the second projection in the vertical axis direction may be between 0.25 and 0.34, and the ratio of the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal axis direction and the width w of the second projection in the sagittal axis direction may be between 0.42 and 0.55, at this time, the sounding part 11 may be fully attached to the auricular region, the sounding part 11 may not cover the auricle opening of the user, so that the auricle opening of the user may be fully opened, and the user may obtain external sound conveniently. In addition, the end FE of the sound generating part 11 may be closer to or abut against the inner contour of the auricle, and the acoustic short-circuit area between the end FE of the sound generating part 11 and the inner contour of the auricle is significantly reduced, so that the volume of the listening sound at the user's ear canal opening is significantly increased. Further, the end FE of the sounding part is close to the inner contour of the auricle, which can provide support for the sounding part 11, improving the stability of the user wearing the device. When the whole or part of the structure of the sound emitting part 11 covers the antitragus region of the user, the housing of the sound emitting part 11 itself can function as a baffle to increase the sound path difference from the sound outlet and the pressure release hole to the ear canal opening so as to increase the sound intensity at the ear canal opening. Further, in the wearing state, the side wall of the sounding part 11 is attached to the anthelix region, and the concave-convex structure of the anthelix region can also play a role of a baffle, which can increase the sound path of the sound emitted from the pressure release hole to the ear canal opening, thereby increasing the sound path difference from the sound release hole and the pressure release hole to the ear canal opening. In addition, when the whole or part of the sound emitting part 11 covers the antitragus region of the user, the sound emitting part 11 may not extend into the ear canal opening of the user, and it may be ensured that the ear canal opening remains in a sufficiently open state, so that the user obtains sound information in the external environment, and meanwhile, wearing comfort of the user is improved. For the specific content of the entire or partial structure of the sound emitting portion 11 that substantially covers the antihelix region of the user, reference may be made to the content elsewhere in this specification.
In some embodiments, in order to allow the whole or part of the structure of the sound generating portion 11 to extend into the concha cavity, for example, the position of the sound generating portion 11B relative to the ear portion shown in fig. 2, the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction may be in the range of 25mm-43mm, the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal axis direction may be in the range of 20mm-32.8, and correspondingly, at this time, the ratio of the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction to the height h of the second projection in the vertical axis direction may be in the range of 0.35-0.6, and the ratio of the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal axis direction to the width w of the second projection in the sagittal axis direction may be in the range of 0.4-0.65. In some embodiments, the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction may be in the range of 25mm-39mm, where the ratio of the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction and the height h between the centroid O of the second projection in the vertical axis direction may be between 0.35-0.55, the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal axis direction may be in the range of 22.6mm-30.2mm, where the ratio of the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal axis direction and the width w of the second projection in the sagittal axis direction may be between 0.45-0.5, where a larger portion of the sound generating portion 11 may extend into the concha cavity, and the size of the gap between the sound generating portion 11 and the concha cavity may be smaller, so that the sound effect of the user's ear canal mouth may be further improved. More preferably, the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction may be in the range of 28.5mm-35.7mm, the ratio of the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction to the height h of the second projection in the vertical axis direction may be between 0.35-0.5, the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal axis direction may be in the range of 25mm-28mm, the ratio of the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal axis direction to the width w of the second projection in the sagittal axis direction may be between 0.5-0.55, more part of the sound generating portion 11 may extend into the concha cavity, the end FE of the sound generating portion 11 may be closer to or abut against the antitragus, and the gap size between the sound generating portion 11 and the concha cavity may be further reduced. In addition, the antihelix can play a certain supporting role on the sounding part 11, and the stability of the antihelix when a user wears the antihelix device is improved. According to the earphone provided in the embodiment of the present disclosure, the ratio of the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction to the height h between the centroid and the end point of the second projection in the sagittal axis direction is controlled to be between 0.35 and 0.6, and the ratio of the distance between the centroid of the first projection and the end point of the second projection in the sagittal axis direction to the width of the second projection in the sagittal axis direction is controlled to be between 0.4 and 0.65, so that the sound emitting portion 11 extends into the concha cavity at least partially, and forms an acoustic model shown in fig. 4 with the concha cavity of the user, thereby improving the volume of sound of the earphone in the listening position (for example, at the ear canal opening), in particular, the volume of sound with middle and low frequencies, while maintaining a good far-field leakage sound cancellation effect. When part or the whole of the sound emitting part 11 extends into the concha cavity, the sound emitting hole is closer to the auditory meatus, and the volume of sound at the auditory meatus is further increased. In addition, the concha cavity can play a certain supporting and limiting role on the sounding part 11, and stability of the earphone in a wearing state is improved. It should be noted that, the position of the sounding part relative to the auricle may satisfy one of the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction and the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal axis direction, or both of the above two conditions may be satisfied.
It should be further noted that, the area of the first projection of the sound generating portion 11 on the sagittal plane is generally much smaller than the projected area of the auricle on the sagittal plane, so as to ensure that the user does not block the ear canal opening when wearing the earphone 10, and also reduce the load of the user when wearing, so as to facilitate the daily carrying of the user. Under the premise, when the ratio of the distance h 1 between the centroid O of the projection (first projection) of the sound generating part 11 on the sagittal plane and the projection (highest point of the second projection) of the highest point A1 of the auricle on the sagittal plane to the height h of the vertical axis direction of the second projection is too small or too large in the wearing state, a part of the structure of the sound generating part 11 may be located above the top of the auricle or at the earlobe of the user, so that the sound generating part 11 cannot be supported and limited sufficiently by the auricle, and the problem that the wearing is unstable and easy to fall off is caused. In order to ensure that the earphone does not block the ear canal opening of the user, ensure the stability and comfort of wearing the earphone by the user and have better listening effect, in some embodiments, the ratio of the distance h 1 between the centroid O of the first projection and the highest point A1 of the second projection in the vertical axis direction to the height h of the second projection in the vertical axis direction is controlled between 0.35-0.6, so that when part or the whole structure of the sound generating part stretches into the concha cavity, the acting force of the concha cavity on the sound generating part 11 can play a certain supporting and limiting role on the sound generating part 11, thereby improving the wearing stability and comfort of the user. Meanwhile, the sound emitting part 11 can also form an acoustic model shown in fig. 4 with the concha cavity, so that the sound volume of a user in a sound listening position (for example, an ear canal opening) is ensured, and the sound leakage volume of a far field is reduced. Preferably, the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction may be in the range of 25mm-39mm, and the ratio of the distance h 1 between the centroid O of the first projection and the highest point A1 of the second projection in the vertical axis direction to the height h of the second projection in the vertical axis direction is between 0.35-0.55. More preferably, the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction may be in the range of 28.5mm to 35.7mm, and the ratio of the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction to the height h between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction is controlled to be 0.4 to 0.5.
Similarly, when the ratio of the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal axis direction to the width w of the second projection in the sagittal axis direction is too large or too small, a part or the whole structure of the sound emitting portion 11 may be located in the face area on the front side of the ear or protrude beyond the outer contour of the auricle, which may also cause a problem that the sound emitting portion 11 cannot construct the acoustic model shown in fig. 4 with the concha cavity and may also cause the earphone 10 to wear unstably. Based on this, in the earphone provided in the embodiment of the present disclosure, by controlling the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal axis direction within the range of 20mm-32.8, at this time, the ratio of the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal axis direction and the width w of the second projection in the sagittal axis direction is between 0.4-0.65, so that the stability and comfort level of wearing the earphone can be improved while the acoustic output effect of the sound emitting portion is ensured. Preferably, the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal direction may be in the range of 22.6mm-30.2mm, and the ratio of the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal direction to the width w of the second projection in the sagittal direction is 0.45-0.6. More preferably, the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal direction may be in the range of 25mm-28mm, and the ratio of the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal direction to the width w of the second projection in the sagittal direction is 0.5-0.55. The technical effects corresponding to the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction and the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal axis direction in the different ranges are mentioned in the foregoing descriptions of the present specification, and are not repeated herein.
As previously described, when the user wears the earphone 10, at least part of its sound emitting portion 11 may extend into the user's concha cavity, forming the acoustic model shown in fig. 4. The outer wall surface of the casing of the sound generating part 11 is generally a plane or a curved surface, and the outline of the concha cavity of the user is an uneven structure, and when the sound generating part 11 or the whole structure is extended into the concha cavity, a gap corresponding to the leakage structure 403 shown in fig. 4 is formed because the sound generating part 11 cannot be tightly attached to the concha cavity. FIG. 6 is a schematic diagram of a cavity-like structure shown in accordance with some embodiments of the present description; fig. 7 is a plot of a listening index for a cavity-like structure having different sized leakage structures, according to some embodiments of the present description. As shown in fig. 6, the opening area of the leakage structure on the cavity-like structure is S, and the area of the cavity-like structure directly acted upon by the sound source (for example, "+" shown in fig. 6) contained therein is S0. The term "direct action" as used herein refers to the sound emitted by the contained sound source directly acting acoustically on the wall of the cavity-like structure without passing through the leak structure. The distance between the two sound sources is d0, and the distance from the center of the opening shape of the leak structure to the other sound source (e.g., "-" shown in fig. 6) is L. As shown in fig. 7, keeping L/d0=1.09 unchanged, the larger the relative opening size S/S0, the smaller the listening index. This is because the larger the relative opening, the more sound components the contained sound source radiates directly outward, and the less sound reaches the listening position, resulting in a decrease in listening volume with an increase in the relative opening, which in turn results in a decrease in the listening index. It can be inferred from this that the larger the opening, the smaller the volume of the sound at the listening position.
In some embodiments, considering that the relative position of the sound emitting portion 11 and the ear canal (e.g., the concha cavity) of the user may affect the size of the gap formed between the sound emitting portion 11 and the concha cavity, for example, the gap size may be smaller when the end FE of the sound emitting portion 11 abuts against the concha cavity and larger when the end FE of the sound emitting portion 11 does not abut against the concha cavity. Here, the gap formed between the sound generating portion 11 and the concha cavity may be regarded as a leakage structure in the acoustic model in fig. 4, so the relative position of the sound generating portion 11 and the ear canal (e.g. the concha cavity) of the user may affect the number of leakage structures of the cavity-like structure formed by the sound generating portion 11 and the concha cavity of the user and the opening size of the leakage structures, and the opening size of the leakage structures may directly affect the listening quality, specifically, the larger the opening of the leakage structures is, the more sound components are directly radiated outwards by the sound generating portion 11, and the less sound reaches the listening position. In order to ensure the sound output quality of the sound generating portion 11 by combining the sound volume of the sound generating portion 11 and the sound leakage reducing effect, the sound generating portion 11 can be attached to the concha cavity of the user as much as possible. Accordingly, the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction is controlled within the range of 25mm-43mm, at this time, the ratio of the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction to the height h of the second projection in the vertical axis direction is between 0.35-0.6, and the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal axis direction can be within the range of 20mm-32.8, at this time, the ratio of the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal axis direction to the width w of the second projection in the sagittal axis direction is between 0.4-0.65. Preferably, in some embodiments, in order to improve the wearing comfort of the earphone while ensuring the acoustic output quality of the sound emitting portion 11, a distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction may be in a range of 25mm-39mm, where a ratio of a distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction to a height h of the second projection in the vertical axis direction is between 0.35-0.55, and a distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal axis direction may be in a range of 22.6mm-30.2mm, where a ratio of a distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal axis direction to a width w of the second projection in the sagittal axis direction is between 0.45-0.5. More preferably, the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction may be in the range of 28.5mm to 35.7mm, where the ratio of the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction to the height h of the second projection in the vertical axis direction may be further in the range of 0.35 to 0.5, the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal axis direction may be in the range of 25mm to 28mm, and the ratio of the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal axis direction to the width w of the second projection in the sagittal axis direction may be in the range of 0.5 to 0.55. The technical effects corresponding to the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction and the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal axis direction in the different ranges are mentioned in the foregoing descriptions of the present specification, and are not repeated herein.
In some embodiments, the aforementioned ratio ranges may float over a range, taking into account that there may be some variance in shape and size of the ears of different users. For example, when the ear lobe of the user is longer, the height h of the second projection in the vertical axis direction is larger than that in general, and at this time, when the user wears the earphone 10, the ratio of the distance h 1 between the centroid O of the first projection and the highest point of the second projection in the vertical axis direction to the height h of the second projection in the vertical axis direction becomes smaller, for example, may be between 0.2 and 0.55. Similarly, in some embodiments, when the ear canal of the user is in a forward curved configuration, the width w of the second projection in the sagittal direction is smaller than the normal case, and the distance w 1 between the centroid O of the first projection and the end point of the second projection in the sagittal direction is smaller, and in this case, the ratio between the distance w 1 between the centroid O of the first projection and the end point of the second projection and the width w of the second projection in the sagittal direction may be greater, for example, between 0.4 and 0.75 when the user wears the earphone 10.
The ear of different users may be different, for example, the earlobe of some users may be longer, where the ratio of the distances between the centroid O of the first projection and the highest point of the second projection to the height of the second projection on the vertical axis may have an effect to define the earphone 10, as shown in fig. 5B, where the highest point A3 and the lowest point A4 of the connection area between the auricle and the head of the user are selected for illustration. The highest point at the junction between the pinna and the head is understood to be the location where the projection of the junction area of the pinna and the head in the sagittal plane has the greatest distance from the projection of the specific point at the neck in the sagittal plane. The highest level of the junction between the pinna and the head is understood to be the location where the projection of the junction area of the pinna and the head on the sagittal plane has the smallest distance from the projection of the specific point at the neck on the sagittal plane. In order to ensure both the volume of sound and the leakage-reducing effect of the sound generating portion 11 and to ensure the acoustic output quality of the sound generating portion 11, the sound generating portion 11 may be attached to the concha cavity of the user as much as possible. Accordingly, the ratio of the distance h 3 of the highest point of projection in the vertical axis direction of the centroid O of the first projection to the sagittal plane of the connection region of the auricle to the head to the height h 2 of the highest point and the lowest point of projection in the sagittal plane of the connection region of the auricle to the head can be controlled to be between 0.4 and 0.65, while the ratio of the distance w 1 of the centroid O of the first projection to the end point of the second projection in the sagittal axis direction to the width w of the second projection in the sagittal axis direction can be controlled to be between 0.4 and 0.65. Preferably, in some embodiments, in order to improve wearing comfort of the earphone while ensuring acoustic output quality of the sound emitting portion 11, a ratio of a distance h 3 of a highest point of projection on a sagittal plane of a connection region of the auricle and the head in a vertical axis direction to a height h 2 of highest point and lowest point of projection on the sagittal plane of the connection region of the auricle and the head in the vertical axis direction may be controlled to be between 0.45 and 0.6, and a ratio of a distance w 1 of a centroid O of the first projection and a terminal point of the second projection in the sagittal axis direction to a width w of the second projection in the sagittal axis direction may be between 0.45 and 0.68. More preferably, the ratio of the distance h 3 between the highest point of the projection of the centroid O of the first projection and the connection area of the auricle and the head in the sagittal plane to the height h 2 between the highest point and the lowest point of the projection of the connection area of the auricle and the head in the sagittal plane may be in the range of 0.5-0.6, and the ratio of the distance w 1 between the centroid O of the first projection and the end point of the second projection and the width w of the second projection in the sagittal axis may be in the range of 0.48-0.6.
Referring to fig. 6 and its corresponding disclosure, the larger the opening of the leakage structure in the cavity-like structure, the smaller the volume of the listening at the listening position. In some embodiments, to ensure the volume of the sound at the ear canal opening when the user wears the earphone, the overlapping portion of the area of the first projection of the sound emitting portion 11 on the sagittal plane and the projected area of the concha cavity on the sagittal plane may be controlled to be within a larger range, that is, more portion of the sound emitting portion 11 protrudes into the concha cavity to reduce the size of the gap between the sound emitting portion 11 and the concha cavity, thereby improving the sound effect at the ear canal opening of the user. The extent to which the sound emitting portion 11 protrudes into the concha cavity may be represented by the ratio of the overlapping portion of the area of the first projection and the projected area of the concha cavity on the sagittal plane to the first projected area. For example, a larger ratio indicates that the portion of the sound emitting portion 11 extending into the concha cavity is more. Considering that when the sounding part 11 stretches into the concha cavity more, the sounding part 11 can shield the auditory meatus, so that the auditory meatus of the user cannot be kept in a fully opened state, and the user is influenced to acquire sound information in the external environment. Based on this, while improving the listening effect at the user's ear canal opening, it is ensured that the user's ear canal opening remains sufficiently open to acquire sound information in the external environment, and in some embodiments, the ratio of the overlapping portion of the area of the first projection and the projected area of the concha cavity on the sagittal plane to the first projected area may be in the range of 0.25-0.8. Considering that the ratio of the overlapping part of the first projection area and the projection area of the concha cavity on the sagittal plane to the first projection area is larger, part of the ear canal opening of the user can be covered, the opening degree of the ear canal opening is affected, and then the sound information in the external environment of the user is obtained, the ratio of the overlapping part of the first projection area and the projection area of the concha cavity on the sagittal plane to the first projection area is smaller, the gap size between the sound generating part 11 and the concha cavity is larger, and more preferably, the ratio of the overlapping part of the first projection area and the projection area of the concha cavity on the sagittal plane to the first projection area can be in the range of 0.4-0.7, and the gap size between the sound generating part 11 and the concha cavity can be smaller on the premise of ensuring the opening degree of the ear canal opening is larger, so that the sound effect at the ear canal opening of the user is ensured as much as possible. Based on the above consideration, preferably, the ratio of the overlapping portion of the first projected area and the projected area of the concha cavity on the sagittal plane to the first projected area may be in the range of 0.45-0.65, and the ratio of the overlapping portion of the first projected area and the projected area of the concha cavity on the sagittal plane to the first projected area is set in a more suitable range, so that the overall performance of the earphone is improved on the premise of considering the opening degree of the ear canal opening and the size of the gap between the sounding part 11 and the concha cavity. In the embodiment of the present disclosure, the concha cavity refers to a recessed area under the foot of the helix, that is, the edge of the concha cavity is at least composed of the side wall under the truckle, the outline of the tragus, the inter-screen notch, the opposite-screen tip, the wheel-screen notch, and the outline of the opposite-ear wheel body corresponding to the concha cavity. The projection of the concha cavity in the sagittal plane refers to the projection of the concha cavity edge in the sagittal plane. Furthermore, the size and contour shape of the concha cavities of different users (e.g., different ages, different sexes, different height weights) may vary, with the projected area of the concha cavities of different users in the sagittal plane being within a certain range (e.g., 320mm 2-410mm2).
In some embodiments, the extent to which the sound emitting portion protrudes into the concha cavity may also be reflected by controlling the ratio (also referred to as the overlap ratio) of the area of the first projection to the projected area of the concha cavity in the sagittal plane, and controlling the ratio of the area of the first projection to the projected area of the concha cavity in the sagittal plane within a specific range to reduce the gap size. The following will specifically describe with reference to fig. 8.
Fig. 8 is a schematic diagram of an exemplary frequency response curve corresponding to the different overlapping proportions of the area of the first projection of the sound generating portion 11 on the sagittal plane and the projected area of the user's concha cavity on the sagittal plane according to some embodiments of the present disclosure. In fig. 8, the abscissa represents frequency (unit: hz), and the ordinate represents frequency response (unit: dB) at the ear canal orifice corresponding to different overlapping ratios. As can be seen from fig. 8, when the user wears the earphone and at least part of the structure of the sound generating portion 11 covers the concha cavity, that is, when the first projection of the sound generating portion 11 in the sagittal plane and the projection of the concha cavity in the sagittal plane have an overlapping region, the volume of the sound at the ear meatus of the user has a significant increase, especially in the middle-low frequency range, compared to when the first projection and the projection of the concha cavity in the sagittal plane do not have an overlapping region (the overlapping ratio is 0%). In some embodiments, to improve the listening effect when the user wears the earphone, the overlapping ratio of the area of the first projection of the sound generating part 11 on the sagittal plane and the area of the projection of the user's concha cavity on the sagittal plane may be not less than 9.26%. With continued reference to fig. 8, as the overlapping ratio of the area of the first projection of the sound generating portion 11 on the sagittal plane and the area of the projection of the user's concha cavity on the sagittal plane increases, the higher the hearing volume of the user at the ear canal opening increases, and particularly when the overlapping ratio of the area of the first projection and the area of the projection of the user's concha cavity on the sagittal plane increases from 36.58% to 44.01%, the hearing effect increases significantly. Based on this, in order to further enhance the listening effect of the user, the overlapping ratio of the area of the first projection and the area of the projection of the user's concha cavity on this sagittal plane is not less than 44.01%. Preferably, the overlapping ratio of the area of the first projection to the area of the projection of the user's concha cavity on this sagittal plane is not less than 57.89%. The frequency response curve corresponding to the overlapping ratio of the measured area of the first projection and the area of the projection of the user's concha cavity on the sagittal plane in the embodiment of the present disclosure is measured by changing the wearing position of the sound generating portion (for example, translating in the sagittal axis or the vertical axis) when the wearing angle of the sound generating portion (the angle between the upper side wall or the lower side wall and the horizontal direction) and the size of the sound generating portion are fixed.
The earphone provided in the embodiments of the present disclosure, by extending at least part of the sound generating portion 11 into the concha cavity, and controlling the overlapping ratio of the area of the first projection on the sagittal plane and the area of the projection of the concha cavity of the user on the sagittal plane to be not less than 44.01%, the sound generating portion 11 and the concha cavity of the user can be better matched to form the acoustic model shown in fig. 4, so as to improve the volume of the sound of the earphone at the listening position (for example, at the mouth of the ear canal), especially the volume of the sound of medium-low frequency sound.
It should be noted that, in order to ensure that the ear canal opening is not blocked by the user when wearing the earphone 10, so that the user can obtain the sound output by the earphone 10 and also obtain the sound in the external environment, the overlapping ratio of the area of the first projection of the sounding part 11 on the sagittal plane and the area of the projection of the concha cavity on the sagittal plane should not be too large. In the wearing state, when the overlapping proportion of the first projection area of the sound generating part 11 on the sagittal plane and the projection area of the user's concha cavity on the sagittal plane is too small, the undersize of the sound generating part 11 extending into the concha cavity leads to the smaller attaching area of the sound generating part 11 and the user's concha cavity, the concha cavity cannot be utilized to play a sufficient supporting and limiting role on the sound generating part 11, the problem that the wearing is unstable and easy to fall off exists, and on the other hand, the gap size formed by the sound generating part 11 and the concha cavity is too large, so that the hearing volume of the user's ear canal opening is influenced. In order to ensure that the earphone is not blocked on the premise of not blocking the ear canal opening of the user, the stability and the comfort of wearing the earphone by the user are ensured, and the better listening effect is achieved, in some embodiments, the overlapping proportion of the area of the first projection of the sound generating part 11 on the sagittal plane and the area of the projection of the user's concha cavity on the sagittal plane can be 44.01% -77.88%, so that when part or the whole structure of the sound generating part 11 stretches into the concha cavity, the sound generating part 11 can be supported and limited to a certain extent through the acting force of the concha cavity on the sound generating part 11, and the wearing stability and the comfort of the earphone are further improved. Meanwhile, the sound emitting part 11 can also form an acoustic model shown in fig. 4 with the concha cavity, so that the sound volume of a user in a sound listening position (for example, an ear canal opening) is ensured, and the sound leakage volume of a far field is reduced. Preferably, the overlapping ratio of the area of the first projection of the sound generating part 11 on the sagittal plane and the area of the projection of the user's concha cavity on the sagittal plane may be 46% -71.94%. More preferably, the overlapping ratio of the area of the first projection of the sound generating portion 11 on the sagittal plane and the area of the projection of the user's concha cavity on the sagittal plane may be 48% -65%. More preferably, the overlapping ratio of the area of the first projection of the sound generating portion 11 on the sagittal plane and the area of the projection of the user's concha cavity on the sagittal plane may be 57.89% -62%.
Referring to fig. 5A, the shape of the first projection of the sounding part 11 in the sagittal plane may include a long axis direction Y and a short axis direction Z. In some embodiments, when the size of the sound generating portion 11 in the long axis direction Y or the short axis direction Z is too small, the volume of the sound generating portion 11 is relatively small, so that the area of the diaphragm disposed inside the sound generating portion is also relatively small, which results in low efficiency of the diaphragm pushing the air inside the casing of the sound generating portion 11 to generate sound, and affects the acoustic output effect of the earphone. In addition, when the size of the sounding part 11 in the long axis direction Y is too large, the sounding part 11 exceeds the range of the concha cavity, cannot extend into the concha cavity, and cannot form a cavity-like structure, or the size of a gap formed between the sounding part 11 and the concha cavity is large, so that the hearing volume of the earphone 10 worn by the user at the ear canal opening and the leakage effect of the far field are affected. When the size of the sound emitting portion 11 in the short axis direction Z is too large, the sound emitting portion 11 may cover the user's ear canal opening, affecting the user to obtain sound information in the external environment. In some embodiments, in order to provide a user with a better acoustic output quality when wearing the earphone 10, the shape of the first projection may have a size in the long axis direction Y ranging between 12mm-32 mm. Preferably, the shape of the first projection has a dimension in the long axis direction Y in the range of 18mm-29 mm. More preferably, the dimension of the shape of the first projection along the long axis direction Y may range from 20mm to 27mm, and still more preferably, the dimension of the shape of the first projection along the long axis direction Y may range from 22mm to 25mm. Correspondingly, the shape of the first projection has a dimension in the short axis direction Z in the range of 4.5mm-18 mm. Preferably, the shape of the first projection has a dimension in the short axis direction Z in the range of 10mm-15 mm. More preferably, the shape of the first projection may have a size in the short axis direction Z in the range of 11mm-13.5mm. Further preferably, the shape of the first projection may have a size in the short axis direction Z in the range of 12mm-13mm. To further illustrate the effect of the shape of the first projection of the sound generating portion 11 in the sagittal plane on the listening effect of the user wearing the earphone, the following is an exemplary description of the ratio of the dimension of the shape of the first projection of the sound generating portion 11 in the sagittal plane along the long axis direction Y to the dimension of the shape of the first projection of the sound generating portion 11 in the sagittal plane along the short axis direction Z.
Fig. 9 shows an exemplary frequency response curve diagram corresponding to a dimension of the first projection of the sound generating portion 11 on the sagittal plane in the long axis direction Y and a dimension of the sound generating portion 11 on the short axis direction Z at different ratios when the first projection area of the sound generating portion 11 on the sagittal plane is constant (for example, 119mm 2). In fig. 9, the abscissa indicates the frequency (unit: hz), and the ordinate indicates the total sound pressure level (unit: dB) corresponding to the dimension of the first projection of the sound emitting portion 11 on the sagittal plane in the long axis direction Y and the dimension in the short axis direction Z at different ratios. In order to facilitate distinguishing between the different frequency response curves, here in the range of 100Hz-1000 Hz, the frequency response curves shown from top to bottom in fig. 9 correspond to L5, L4, L3, L2 and L1, respectively. Wherein L1 is a frequency response curve corresponding to a ratio of a dimension of the first projection in the major axis direction Y to a dimension in the minor axis direction Z of 4.99 (i.e., a dimension of the first projection in the major axis direction Y is 24.93mm, a dimension of the first projection in the minor axis direction Z is 4.99 mm), L2 is a frequency response curve corresponding to a ratio of a dimension of the first projection in the major axis direction Y to a dimension in the minor axis direction Z of 3.99 (i.e., a dimension of the first projection in the major axis direction Y is 22.43mm, a dimension of the first projection in the minor axis direction Z is 5.61 mm), L3 is a frequency response curve corresponding to a ratio of a dimension of the first projection in the major axis direction Y to a dimension in the minor axis direction Z of 3.04 (i.e., a dimension of the first projection in the major axis direction Y is 19.61mm, a dimension of the first projection in the minor axis direction Z is 6.54 mm), L4 is a frequency response curve corresponding to a ratio of a dimension of the first projection in the major axis direction Y in the minor axis direction Y is about 2.0 (i.e., a dimension of the first projection in the major axis direction Y is 16.33mm, a dimension of the first projection in the minor axis direction Z is 5.31 mm, and a ratio of the first projection in the minor axis direction is a dimension of the first projection in the minor axis direction Z is 12.31.12.0 mm). As can be seen from fig. 9, the resonance frequencies corresponding to the frequency response curves L1 to L5 are substantially the same (all are around 3500 Hz), but when the ratio of the dimension of the first projection in the long axis direction Y to the dimension in the short axis direction Z is 1.0 to 3.0, the frequency response curve of the sound emitting portion 11 is smoother as a whole, and has a better frequency response at 100Hz to Hz, and when the frequency is 5000Hz, the larger the ratio of the dimension of the first projection in the long axis direction Y to the dimension in the short axis direction Z is, the faster the sound frequency response of the sound emitting portion 11 at the ear canal opening is decreased. Based on this, in some embodiments, in order to enable a user to experience a better acoustic output effect when wearing the earphone, a ratio of a dimension of the first projection of the sound generating portion 11 on the sagittal plane along the long axis direction Y to a dimension of the projection of the sound generating portion 11 on the sagittal plane along the short axis direction Z may be between 1.0 and 3.0. In some embodiments, considering that, in the case that the area of the first projection is fixed, the smaller the ratio of the dimension of the first projection of the sound generating part 11 in the sagittal plane along the long axis direction Y to the dimension of the projection of the sound generating part 11 in the sagittal plane along the short axis direction Z is, the larger the dimension of the projection of the sound generating part 11 in the sagittal plane along the short axis direction Z is, since the dimension of the projection of the sound generating part 11 in the sagittal plane along the short axis direction Z is too large, the sound generating part 11 may not be well projected into the user's concha cavity, and thus cause wearing stability and comfort problems, so that, in order to ensure wearing stability and comfort at the same time, the ratio of the dimension of the first projection of the sound generating part 11 in the sagittal plane along the long axis direction Y to the dimension of the projection of the sound generating part 11 in the sagittal plane along the short axis direction Z is between 1.4 and 2.5. Preferably, the ratio of the dimension of the first projection of the sound generating part 11 in the sagittal plane along the long axis direction Y to the dimension of the projection of the sound generating part 11 in the sagittal plane along the short axis direction Z may be between 1.4 and 2.3. More preferably, the ratio of the dimension of the first projection of the sound generating part 11 on the sagittal plane along the long axis direction Y to the dimension of the projection of the sound generating part 11 on the sagittal plane along the short axis direction Z may be between 1.45 and 2.0. It can be understood that when the aspect ratio of the sound generating portion 11 is different, the first projection of the sound generating portion 11 on the sagittal plane and the projection of the concha cavity on the sagittal plane have different overlapping ratios, in some embodiments, the ratio of the size of the first projection of the sound generating portion 11 on the sagittal plane along the long axis direction Y to the size of the projection of the sound generating portion 11 on the sagittal plane along the short axis direction Z is controlled to be between 1.4 and 3, so that the projection area of the sound generating portion 11 projected on the sagittal plane in the normal wearing state is relatively moderate, that is, the size of a gap formed between the sound generating portion 11 and the concha cavity is relatively large due to the fact that the projection area of the sound generating portion 11 on the sagittal plane is too small, the volume of listening sound at the user's ear meatus is relatively low, and that the ear meatus opening cannot be kept open, and the sound in the external environment is affected, so that the user has better acoustic experience is avoided.
It should be noted that the frequency response curve measured in fig. 9 was obtained by a simulation experiment, in which the auditory system of the human body was simulated by a model of a model p.574.3 full-band human ear simulator, and the auricle of the human body was simulated by a auricle defined by the ITU-t p.57 standard, and the auricle under the standard included the geometry of the auditory canal. In addition, the frequency response curves corresponding to the measured dimensions in the long axis direction and the measured dimensions in the short axis direction in the embodiments of the present specification are measured by changing the measured dimensions in the long axis direction and the measured dimensions in the short axis direction at a constant wearing angle (angle between the upper side wall or the lower side wall and the horizontal direction) and wearing position of the sounding part.
In some embodiments, the size of the sound emitting portion 11 in the thickness direction X may also affect the listening effect of the earphone worn by the user, as will be further described with reference to fig. 10.
Fig. 10 shows frequency response curves when the area of the first projection of the sound generating portion 11 on the sagittal plane is constant and the ratio of the dimension of the first projection in the long axis direction Y to the dimension of the projection of the sound generating portion 11 on the sagittal plane in the short axis direction Z is constant, and the sound generating portion 11 has different dimensions in the thickness direction X thereof. In fig. 10, the abscissa represents frequency (unit: hz), and the ordinate represents sound pressure level (unit: dB) at the ear canal orifice at different frequencies. The frequency response curve 1001 corresponds to the sound generating unit 11 having a thickness direction of 20mm, the frequency response curve 1002 corresponds to the sound generating unit 11 having a thickness direction X of 10mm, the frequency response curve 1003 corresponds to the sound generating unit 11 having a thickness direction X of 5mm, and the frequency response curve 1004 corresponds to the sound generating unit 11 having a thickness direction X of 1 mm. The size (also called thickness) of the sound generating part 11 along the thickness direction X is proportional to the size of the front cavity of the sound generating part 11 along the thickness direction X, and the smaller the size of the front cavity along the thickness direction X is, the larger the resonance frequency corresponding to the resonance peak of the front cavity is, and the flatter the frequency response curve in the lower frequency range (100 Hz-1000 Hz) is. In some embodiments, the sound outlet is acoustically coupled to the front cavity, and sound in the front cavity is transmitted through the sound outlet to the user's ear canal opening and received by the user's auditory system. If the size of the sound generating portion 11 in the thickness direction X is too large, the resonance frequency corresponding to the front cavity resonance peak of the sound generating portion 11 is too small, which affects the acoustic performance of the sound generating portion 11 in a lower frequency band. In addition, the overall size or weight of the sound emitting portion 11 is large in the wearing state, and stability and comfort of wearing are affected. When the size of the sound emitting portion 11 in the thickness direction X is too small, the space of the front and rear chambers of the sound emitting portion 11 is limited, which affects the vibration amplitude of the diaphragm and limits the output of the sound emitting portion 11 at a low frequency and a large amplitude. Based on this, in order to ensure that the sound emitting portion 11 can have a good acoustic output effect and to ensure stability when worn, the thickness of the sound emitting portion 11 (the dimension in the thickness direction of the sound emitting portion 11) may be 2mm to 20mm in some embodiments. Preferably, the thickness of the sound emitting part 11 may be 5mm to 15mm. More preferably, the thickness of the sound emitting portion 11 may be set to 8mm to 12mm. In the wearing state, when at least one of the two side walls of the sound emitting portion 11 (i.e., the inner side surface facing the outside of the ear of the user and the outer side surface facing away from the outside of the ear of the user) that are disposed opposite to each other in the thickness direction X is non-planar, the thickness of the sound emitting portion 11 may refer to the maximum distance between the inner side surface and the outer side surface of the sound emitting portion 11 in the thickness direction X.
The frequency response curves corresponding to the measured different thicknesses in the embodiments of the present disclosure are measured by changing the thickness dimension of the sounding part when the wearing angle (angle between the upper side wall or the lower side wall and the horizontal direction), the wearing position, and the major axis dimension and the minor axis dimension of the sounding part are constant.
Fig. 11A-11C are schematic diagrams illustrating different exemplary mating positions of the earphone with the user's ear canal according to the present description.
The size of the gap formed between the sound emitting portion 11 and the edge of the concha cavity is related to the distance of the tip FE of the sound emitting portion 11 from the edge of the concha cavity, in addition to the inclination angle of the projection of the upper side wall 111 (also referred to as upper side surface) or the lower side wall 112 (also referred to as lower side surface) of the sound emitting portion 11 on the sagittal plane with respect to the horizontal direction (parallel to the sagittal axis S and in the same direction), the size of the sound emitting portion 11 (for example, the size in the short axis direction Z shown in fig. 11A, the long axis direction Y, the size in the thickness direction X shown in fig. 3), and the distance of the tip FE of the sound emitting portion 11 from the edge of the concha cavity can be characterized by the distance of the midpoint of the projection of the tip FE of the sound emitting portion 11 on the sagittal plane with respect to the projection of the edge of the concha cavity on the sagittal plane. The concha cavity refers to a recessed area under the foot of the helix, that is, the edge of the concha cavity at least consists of the side wall under the truckle, the outline of the tragus, the inter-screen notch, the opposite-screen tip, the tragus notch and the outline of the opposite-ear wheel body corresponding to the concha cavity. The projection of the edge of the concha cavity in the sagittal plane is the outline of the projection of the concha cavity in the sagittal plane. Specifically, one end of the sounding part 11 is connected to the suspension structure 12 (the second portion 122 of the ear hook), when the user wears the device, a part or the whole structure of the sounding part 11 extends into the concha cavity, and the position of the end FE (free end) of the sounding part 11 relative to the edge of the concha cavity affects the overlapping ratio of the area of the first projection of the sounding part 11 on the sagittal plane and the area of the projection of the concha cavity on the sagittal plane, thereby affecting the size of the gap formed between the sounding part 11 and the concha cavity, and further affecting the volume of the sound at the level of the user's ear meatus. Further, the projected distance of the midpoint of the projection of the tip FE of the sound emitting portion 11 on the sagittal plane and the edge of the concha cavity on the sagittal plane may reflect the position of the tip FE of the sound emitting portion 11 with respect to the concha cavity and the extent to which the sound emitting portion 11 covers the concha cavity of the user. It should be noted that, when the projection of the end FE of the sound generating portion 11 on the sagittal plane is a curve or a broken line, the midpoint of the projection of the end FE of the sound generating portion 11 on the sagittal plane may be selected by the following exemplary method: the projection of the end FE on the sagittal plane can be selected as a line segment along two points with the greatest distance in the short axis direction, and the midpoint on the line segment is selected as a perpendicular bisector, wherein the point where the perpendicular bisector intersects with the projection is the midpoint of the projection of the end of the sounding part 11 on the sagittal plane. In some embodiments, when the end FE of the sound generating portion 11 is curved, a tangent point where a tangent line parallel to the short axis direction Z is located on the projection thereof may be selected as a midpoint of the projection of the end FE of the sound generating portion 11 on the sagittal plane.
As shown in fig. 11A, when the sounding part 11 is not abutted against the edge of the concha chamber 102, the tip FE of the sounding part 11 is located in the concha chamber 102, that is, the midpoint of the projection of the tip FE of the sounding part 11 on the sagittal plane does not overlap with the projection of the edge of the concha chamber 102 on the sagittal plane. As shown in fig. 11B, the sound emitting portion 11 of the earphone 10 protrudes into the concha chamber 102, and the tip FE of the sound emitting portion 11 abuts against the edge of the concha chamber 102, that is, the midpoint of the projection of the tip FE of the sound emitting portion 11 on the sagittal plane overlaps with the projection of the edge of the concha chamber 102 on the sagittal plane. As shown in fig. 11C, the sound emitting portion 11 of the earphone 10 covers the concha cavity, and the tip FE of the sound emitting portion 11 is located between the edge of the concha cavity 102 and the inner contour 1014 of the auricle.
Referring to fig. 11A to 11C, when the end FE of the sound generating portion 11 is located within the edge of the concha cavity 102, the projected midpoint C3 of the end FE of the sound generating portion 11 on the sagittal plane is located too far from the projected area of the edge of the concha cavity 102 on the sagittal plane, so that the overlapping ratio of the area of the first projection of the sound generating portion 11 on the sagittal plane to the projected area of the concha cavity on the sagittal plane is too small, and the size of the gap formed between the sound generating portion 11 and the edge of the concha cavity 102 is large, affecting the volume of the listening sound at the user's ear meatus. When the midpoint C3 of the projection of the sounding tip FE on the sagittal plane is located at a position between the projection of the edge of the concha chamber 102 on the sagittal plane and the projection of the inner contour 1014 of the auricle on the sagittal plane, if the projection of the midpoint C3 of the projection of the sounding tip FE on the sagittal plane and the edge of the concha chamber 102 on the sagittal plane is too large, the tip FE of the sounding part 11 interferes with the auricle, and the proportion of the sounding part 11 covering the concha chamber 102 cannot be increased. In addition, when the user wears the ear nail chamber 102, if the end FE of the sound emitting portion 11 is not located in the ear nail chamber 102, the edge of the ear nail chamber 102 cannot limit the sound emitting portion 11, and the sound emitting portion is likely to fall off. In addition, the increased size of the sound emitting part 11 increases its own weight, affecting the comfort of wearing and portability of the user. When the projection of the end FE of the sound generating portion 11 on the sagittal plane is a curve or a polygonal line, the midpoint of the projection of the end FE of the sound generating portion 11 on the sagittal plane may be selected by the following exemplary method, a line segment may be selected from the beginning point and the end point of the projection of the end FE on the sagittal plane, a midpoint on the line segment may be selected to be a perpendicular bisector, and a point where the perpendicular bisector intersects the projection is the midpoint of the projection of the end of the sound generating portion 11 on the sagittal plane. In some embodiments, when the end FE of the sound generating portion 11 is curved, a tangent point where a tangent line parallel to the short axis direction Z is located on the projection thereof may be selected as a midpoint of the projection of the end FE of the sound generating portion 11 on the sagittal plane.
Fig. 12 is a schematic diagram of exemplary frequency response curves corresponding to projections of the tip of the sound emitting portion in the sagittal plane and projections of the edge of the concha cavity in the sagittal plane at different distances according to some embodiments of the present disclosure. Referring to fig. 12, where the abscissa indicates frequency (unit: hz), the ordinate indicates sound pressure level (unit: dB) at the ear canal orifice at different frequencies, the frequency response curve 1201 is a frequency response curve when the projection distance between the midpoint C3 of the projection of the sounding tip in the sagittal plane and the rim of the concha cavity in the sagittal plane is 0mm (for example, when the tip of the sounding tip 11 abuts against the rim of the concha cavity in the wearing state), the frequency response curve 1202 is a frequency response curve when the projection distance between the midpoint C3 of the projection of the sounding tip in the sagittal plane and the rim of the concha cavity in the sagittal plane is 4.77mm, the frequency response curve 1203 is a frequency response curve when the projection distance between the midpoint C3 of the projection of the sounding tip in the sagittal plane and the rim of the concha cavity in the sagittal plane is 7.25mm, the frequency response curve 1204 is a frequency response curve when the projection distance between the midpoint C3 of the projection of the sounding tip in the sagittal plane and the rim of the concha cavity in the sagittal plane is 10.48mm, and the frequency response curve 1205 is a frequency response curve when the projection distance between the midpoint C3 of the sounding tip in the sagittal plane and the rim of the concha cavity in the sagittal plane is 19.3 mm. As can be seen from fig. 12, when the projection distance between the midpoint C3 of the projection of the tip of the sound emitting portion 11 in the sagittal plane and the edge of the concha cavity in the sagittal plane is 0mm (for example, the tip of the sound emitting portion 11 abuts against the edge of the concha cavity in the wearing state), 4.77mm, 7.25mm, the sound pressure level of the sound measured at the meatus mouth is large. When the projection distance of the midpoint C3 of the projection of the tip of the sound emitting portion in the sagittal plane and the edge of the concha cavity in the sagittal plane is 19.24mm (for example, the tip of the sound emitting portion 11 abuts against the edge of the concha cavity in the wearing state), the sound pressure level of the sound measured at the meatus mouth is relatively small. That is, in the wearing state, when the distance between the midpoint C3 of the projection of the tip of the sound generating portion 11 in the sagittal plane and the projection of the edge of the concha cavity in the sagittal plane is larger, that is, the less the sound generating portion 11 protrudes into the concha cavity, the smaller the overlapping ratio of the area of the first projection of the sound generating portion 11 in the sagittal plane and the area of the projection of the edge of the concha cavity in the sagittal plane is, the worse the listening effect at the meatus. Based on this, in order to ensure that the earphone 10 has a good listening effect and also ensures the comfort and stability of wearing by the user, in some embodiments, the distance between the midpoint C3 of the projection of the end FE of the sound generating portion 11 on the sagittal plane and the projection of the edge of the concha cavity on the sagittal plane is not greater than 16mm. Preferably, the distance between the midpoint C3 of the projection of the end FE of the sound generating part 11 on the sagittal plane and the projection of the edge of the concha cavity on the sagittal plane is not more than 13mm. More preferably, the distance between the midpoint C3 of the projection of the end FE of the sound generating portion 11 on the sagittal plane and the projection of the edge of the concha cavity on the sagittal plane may be 0mm-10.92mm. By way of example only, in some embodiments, the midpoint C3 of the projection of the distal end FE of the sound emitting portion 11 onto the sagittal plane may be from 0mm to 15.3mm from the projection of the edge of the concha cavity onto the sagittal plane. Preferably, the distance between the midpoint C3 of the projection of the end FE of the sound generating part 11 on the sagittal plane and the projection of the edge of the concha cavity on the sagittal plane may be 0mm-10.48mm. More preferably, the distance between the midpoint C3 of the projection of the end FE of the sound generating portion 11 on the sagittal plane and the projection of the edge of the concha cavity on the sagittal plane may be 0mm-7.25mm. More preferably, the distance between the midpoint C3 of the projection of the end FE of the sound generating part 11 on the sagittal plane and the projection of the edge of the concha cavity on the sagittal plane may be 0mm-4.77mm. In some embodiments, the end of the sound generating portion may abut against the edge of the concha cavity, which may be understood herein that the projection of the end FE of the sound generating portion 11 in the sagittal plane overlaps with the projection of the edge of the concha cavity in the sagittal plane (for example, the position of the sound generating portion 11 relative to the concha cavity shown in fig. 11A), that is, when the projection of the end of the sound generating portion in the sagittal plane is 0mm away from the projection of the edge of the concha cavity in the sagittal plane, the sound generating portion 11 may have a better frequency response, and at this time, the end of the sound generating portion 11 abuts against the edge of the concha cavity, which may play a supporting and limiting role on the sound generating portion 11, so as to improve the stability of wearing the earphone by the user. It should be noted that, in some embodiments, the distance between the midpoint C3 of the projection of the end FE of the sound generating portion 11 on the sagittal plane and the projection of the edge of the concha cavity 102 on the sagittal plane may refer to the minimum distance between the midpoint C3 of the projection of the end FE of the sound generating portion 11 on the sagittal plane and the projection of the edge of the concha cavity 102 on the sagittal plane. In some embodiments, the distance of the midpoint C3 of the projection of the end FE of the sound emitting portion 11 onto the sagittal plane from the projection of the edge of the concha cavity 102 onto the sagittal plane may also refer to the distance in the sagittal axis direction. In fig. 12, the distance between the projection of the distal end of the sound emitting unit 11 on the sagittal plane and the projection of the edge of the concha cavity on the sagittal plane is measured on the scene where the distal end of the sound emitting unit 11 extends into the concha cavity. In a specific wearing scenario, the point other than the midpoint C3 in the projection of the end FE of the sound generating portion 11 on the sagittal plane may abut against the edge of the concha cavity, and the distance between the midpoint C3 of the projection of the end FE of the sound generating portion 11 on the sagittal plane and the projection of the edge of the concha cavity on the sagittal plane may be greater than 0mm. In some embodiments, the midpoint C3 of the projection of the end FE of the sound emitting portion 11 on the sagittal plane may be 2mm-16mm from the projection of the edge of the concha cavity on the sagittal plane. Preferably, the distance between the midpoint C3 of the projection of the end FE of the sound generating part 11 on the sagittal plane and the projection of the edge of the concha cavity on the sagittal plane may be 4mm-10.48mm. Furthermore, the concha cavity 102 is in a concave structure, the corresponding side wall of the concha cavity 102 is not a flat wall surface, and the projection of the edge of the concha cavity on the sagittal plane is an irregular two-dimensional shape, and the projection of the corresponding side wall of the concha cavity 102 on the sagittal plane may be on the contour of the shape or may be outside the contour of the shape, so that the midpoint of the projection of the end FE of the sound generating part 11 on the sagittal plane and the projection of the edge of the concha cavity 102 on the sagittal plane may not overlap. For example, the midpoint of the projection of the end FE of the sound emitting portion 11 on the sagittal plane may be inboard or outboard of the projection of the edge of the concha chamber 102 on the sagittal plane. In the embodiment of the present specification, when the end FE of the sound generating portion 11 is located in the concha chamber 102, the distance between the end FE of the sound generating portion 11 and the projection of the midpoint of the projection on the sagittal plane and the projection of the edge of the concha chamber 102 on the sagittal plane is within a specific range (for example, not more than 6 mm), both the end FE of the sound generating portion 11 and the edge of the concha chamber 102 can be regarded as abutting.
Note that, the frequency response curves of the end FE of the sounding part measured in the embodiment of the present disclosure, which correspond to the different distances between the midpoint of the projection on the sagittal plane and the projection of the edge of the concha cavity on the sagittal plane, are measured by changing the wearing position of the sounding part (for example, translating in the sagittal axis direction) at a constant wearing angle (angle between the upper side wall or the lower side wall and the horizontal direction) of the sounding part, and the dimensions in the major axis direction, the minor axis direction, and the thickness direction.
In some embodiments, referring to fig. 11A-11C, a first projection of the sound emitting portion 11 on the sagittal plane and a projection of the ear canal opening on the sagittal plane (e.g., dashed area 1016 shown in fig. 11A-11C) may at least partially overlap when the earphone 10 is in the worn state. The distance between the centroid O of the first projection of the sound generating part 11 on the sagittal plane and the centroid P' of the projection of the ear canal opening on the sagittal plane may reflect the relative positional relationship between the sound generating part 11 and the ear canal opening and the overlapping ratio of the area of the first projection of the sound generating part 11 on the sagittal plane and the area of the projection of the ear canal opening on the sagittal plane. The overlapping proportion can affect the number of leakage structures of the cavity-like structure formed by the sound generating part 11 and the ear of the user and the opening size of the leakage structure, and the opening size of the leakage structure can directly affect the listening quality, and the larger the opening of the leakage structure is, the more the sound components are directly radiated outwards by the sound generating part 11, and the less the sound reaches the listening position.
Fig. 13A is a schematic diagram of an exemplary frequency response curve corresponding to an area of a first projection of the sound generating portion 11 on the sagittal plane and an area of a projection of the concha cavity on the sagittal plane at different overlapping ratios according to some embodiments of the present disclosure, and fig. 13B is a schematic diagram of an exemplary frequency response curve corresponding to a centroid of the first projection of the sound generating portion 11 on the sagittal plane and a centroid of a projection of the ear canal opening on the sagittal plane at different distances according to some embodiments of the present disclosure.
Referring to fig. 13A, where the abscissa is the overlapping ratio of the area of the first projection of the sound generating portion 11 on the sagittal plane and the area of the projection of the concha cavity on the sagittal plane, and the ordinate is the sound pressure level of sound at the ear canal opening corresponding to the different overlapping ratio, and a straight line 1301 represents a linear relationship fitted according to the overlapping ratio of the area of the first projection and the area of the projection of the concha cavity on the sagittal plane and the sound pressure level at the ear canal opening at a frequency of 500 Hz; line 1302 represents a linear relationship fitted to the sound pressure level at the ear canal orifice according to the overlapping ratio of the area of the first projection and the area of the projection of the concha cavity on the sagittal plane at a frequency of 1 kHz; the line 1303 represents the linear relationship of the ratio of the overlap of the area of the first projection and the area of the projection of the concha cavity on the sagittal plane, fitted to the sound pressure level at the ear canal opening, at a frequency of 3 kHz. The open circle points in fig. 13A represent test data corresponding to the different overlapping ratios of the area of the first projection and the area of the projection of the concha cavity on the sagittal plane at a frequency of 500 Hz; the lighter gray scale circles in fig. 13A represent test data corresponding to different overlapping ratios of the area of the first projection and the area of the projection of the concha cavity on the sagittal plane at a frequency of 1 kHz; the black circles in fig. 13A represent test data corresponding to the case where the area of the first projection and the area of the projection of the concha cavity on the sagittal plane are in different overlapping ratios at a frequency of 3 kHz. As can be seen from fig. 13A, the overlapping ratio of the area of the first projection to the area of the projection of the concha cavity on the sagittal plane is approximately in positive correlation with the sound pressure level magnitude at the ear canal opening of the user at different frequencies, and when the area of the first projection of the sound emitting part 11 on the sagittal plane overlaps with the area of the projection of the concha cavity on the sagittal plane, there is a significant improvement when the area of the first projection of sound of a specific frequency (e.g., 500Hz, 1kHz, 3 kHz) with respect to the sound emitting part 11 on the sagittal plane and the area of the projection of the concha cavity on the sagittal plane are measured at the ear canal opening without overlapping ratio (overlapping ratio is 0). Based on this, in order to ensure the acoustic output quality of the sound emitting portion 11, the overlapping ratio of the first projection of the sound emitting portion 11 on the sagittal plane and the projection of the concha cavity on the sagittal plane may be made to be between 44.01% -80%. Referring to fig. 13A, when the overlapping ratio is 22% or 32%, the sound pressure level of the sound at the ear canal opening is high, but the structure of the sound emitting portion 11 protruding into the concha cavity is limited, the edge of the concha cavity cannot play a role in supporting and limiting the end of the sound emitting portion 11, and when the overlapping ratio is too high (for example, the overlapping ratio is greater than 80%), the overlapping ratio of the first projection of the sound emitting portion 11 on the sagittal plane and the projection of the concha cavity on the sagittal plane may be between 45% and 71.49% in spite of the high sound pressure level of the sound at the ear canal opening, which may affect the open state of the ear canal opening.
Referring to fig. 13B, the abscissa is the distance between the centroid O of the first projection of the sound generating portion 11 on the sagittal plane and the centroid P' of the projection of the ear canal opening on the sagittal plane, and the ordinate is the sound pressure level of sound at the ear canal opening corresponding to the different distances. Line 1304 represents the linear relationship of the distance of the centroid O of the first projection of the sound emitting portion 11 onto the sagittal plane from the centroid P' of the projection of the ear canal opening onto the sagittal plane fitted to the sound pressure level at the ear canal opening at a frequency of 500 Hz; line 1305 represents the linear relationship of the distance of the centroid O of the first projection of the sound generating portion 11 on the sagittal plane from the centroid P' of the projection of the ear canal opening on the sagittal plane, simulated with the sound pressure level at the ear canal opening, at a frequency of 1 kHz; the line 1306 represents the linear relationship between the distance of the centroid O of the first projection of the sound generating portion 11 on the sagittal plane and the centroid P' of the projection of the ear canal opening on the sagittal plane and the sound pressure level at the ear canal opening, at a frequency of 3 kHz. The open circle point in fig. 13B represents test data corresponding to the centroid O of the first projection of the sound emitting portion 11 on the sagittal plane and the centroid P' of the projection of the ear canal opening on the sagittal plane at a frequency of 500Hz at different distances; the black circle point in fig. 13B represents test data corresponding to the case where the centroid O of the first projection of the sound emitting portion 11 on the sagittal plane and the centroid P' of the projection of the ear canal opening on the sagittal plane are at different distances at a frequency of 1 kHz; the circular point with a shallow gray value in fig. 13B represents test data corresponding to the case where the centroid O of the first projection of the sound emitting portion 11 on the sagittal plane and the centroid P' of the projection of the ear canal opening on the sagittal plane are at different distances at a frequency of 3 kHz. As can be seen from fig. 13B, at different frequencies, the distance between the centroid O of the first projection of the sound emitting part 11 on the sagittal plane and the centroid P ' of the projection of the ear canal opening on the sagittal plane is approximately inversely related to the sound pressure level at the ear canal opening of the user, and as a whole, the sound pressure level of sound of a certain frequency (e.g., 500Hz, 1kHz, 3 kHz) measured at the ear canal opening has a decreasing tendency with increasing distance between the centroid O of the first projection of the sound emitting part 11 on the sagittal plane and the centroid P ' of the projection of the ear canal opening on the sagittal plane, where in combination with fig. 13A and 13B, the larger the distance between the centroid O of the first projection of the sound emitting part 11 on the sagittal plane and the centroid P ' of the projection of the ear canal opening on the sagittal plane is, the smaller the overlapping ratio of the area of the first projection of the sound emitting part 11 on the sagittal plane and the area of the projection of the ear canal opening on the sagittal plane is. The overlapping proportion can affect the number of leakage structures of the cavity-like structure formed by the sound generating part 11 and the ear of the user and the opening size of the leakage structure, and the opening size of the leakage structure can directly affect the listening quality, and the larger the opening of the leakage structure is, the more the sound components are directly radiated outwards by the sound generating part 11, and the less the sound reaches the listening position. Furthermore, when the distance between the centroid O of the first projection of the sounding part 11 on the sagittal plane and the centroid P' of the projection of the ear canal opening on the sagittal plane is too small, the overlapping ratio of the area of the first projection of the sounding part 11 on the sagittal plane and the area of the projection of the ear canal opening on the sagittal plane is too large, the sounding part 11 may cover the ear canal opening of the user, affecting the user to acquire sound information in the external environment. As can be seen from fig. 13B, taking a frequency of 3kHz as an example, the sound pressure levels at the ear canal orifice measured when the centroid O of the first projection of the sound emitting part 11 on the sagittal plane is 7mm and the centroid P 'of the projection of the ear canal orifice on the sagittal plane is 11mm are-72 dB and-70 dB, respectively, and the sound pressure levels at the ear canal orifice measured when the centroid O of the first projection of the sound emitting part 11 on the sagittal plane is 18mm and the centroid P' of the projection of the ear canal orifice on the sagittal plane is 22mm are-80 dB and-84.3 dB, respectively. It is understood that the distance between the centroid O of the first projection of the sound generating unit 11 on the sagittal plane and the centroid P' of the projection of the ear canal opening on the sagittal plane is not excessively large. In some embodiments, to ensure that the user can receive sound information in the external environment while ensuring the acoustic output quality of the sound emitting portion 11 (e.g., a sound pressure level at the ear canal opening greater than-80 dB), the distance between the centroid O of the first projection of the sound emitting portion 11 on the sagittal plane and the centroid P' of the projection of the ear canal opening on the sagittal plane can be 3mm-15mm. Preferably, the distance between the centroid O of the first projection of the sound generating part 11 on the sagittal plane and the centroid P' of the projection of the ear canal opening on the sagittal plane may be 4mm-13mm. More preferably, the distance between the centroid O of the first projection of the sound generating portion 11 on the sagittal plane and the centroid P' of the projection of the ear canal opening on the sagittal plane may be 8mm-10mm.
The frequency response curves corresponding to the different overlapping ratios measured in the embodiments of the present disclosure and the frequency response curve corresponding to the centroid of the first projection and the centroid of the projection of the ear canal orifice in the sagittal plane are measured by changing the wearing position of the sound emitting part (for example, translating in the sagittal axis direction) when the wearing angle of the sound emitting part (the angle between the upper side wall or the lower side wall and the horizontal direction) and the dimensions in the major axis direction, the minor axis direction, and the thickness direction are fixed.
The positional relationship between the sound emitting portion 11 and the auricle, concha cavity, or meatus in the embodiment of the present specification can be determined by the following exemplary method: first, taking a photograph of a model of a human head with an ear in a direction facing the sagittal plane at a specific location, marking the edge of the concha cavity rim, the ear canal mouth contour and the auricle contour (e.g., inner contour and outer contour), these marked contours can be regarded as projection contours of the respective configurations of the ear in the sagittal plane; then, a photograph of wearing the earphone on the human head model is taken at the same angle at the specific position, and the outline of the sound emitting part is marked, wherein the outline can be regarded as the projection of the sound emitting part on the sagittal plane, and the position relation between the sound emitting part (such as the centroid, the tail end and the like) and the edge of the concha cavity, the auditory meatus, the inner outline or the outer outline can be determined through comparative analysis.
Fig. 14 is an exemplary wearing schematic diagram of headphones according to further embodiments of the present description.
Referring to fig. 3 and 14, when the user wears the earphone 10, the centroid O of the first projection may be located in an area surrounded by a contour of the second projection when the sound emitting part 11 extends into the concha cavity, where the contour of the second projection may be understood as a projection of an outer contour of the user's helix, an earlobe contour, an tragus contour, an inter-screen notch, an opposite-screen tip, an on-screen notch, and the like on a sagittal plane. In some embodiments, the volume of the sound emitting portion, the leakage reduction effect, and the comfort and stability of wearing may also be improved by adjusting the distance between the centroid O of the first projection and the contour of the second projection. For example, when the sounding part 11 is located at the top of the auricle, at the earlobe, in a region of the face in front of the auricle, or between the inner contour 1014 of the auricle and the outer edge of the concha cavity, the distance between the centroid O of the first projection and a point in a certain region of the contour of the second projection is too small, and the distance between the centroid O of the first projection and a point in another region is too large, the sounding part cannot form a cavity-like structure (acoustic model shown in fig. 4) with the concha cavity, and the acoustic output effect of the earphone 10 is affected. To ensure acoustic output quality when the user wears the earphone 10, in some embodiments the centroid O of the first projection may be in the range of 10mm-52mm from the contour of the second projection, that is, the centroid O of the first projection may be in the range of 10mm-52mm from any point of the contour of the second projection. Preferably, in order to further enhance the wearing comfort of the earphone 10 and to optimize the cavity-like structure formed by the cooperation of the sound generating portion 11 and the concha cavity, the distance between the centroid O of the first projection and the contour of the second projection may be in the range of 12mm-50.5 mm. More preferably, the centroid O of the first projection may also be in a distance range between 13.5mm and 50.5mm from the contour of the second projection. In some embodiments, by controlling the distance between the centroid O of the first projection and the contour of the second projection to be in the range of 10mm-52mm, the sounding part 11 can be made to be mostly located near the ear canal of the user, and at least part of the sounding part can be made to extend into the concha cavity of the user to form the acoustic model shown in fig. 4, so that sound output by the sounding part 11 can be ensured to be better transmitted to the user. As a specific example, in some embodiments, the minimum distance d1 of the centroid O of the first projection from the contour of the second projection may be 20mm and the maximum distance d2 may be 48.5mm.
Referring to fig. 13A to 14, in the wearing state of the earphone, the distance from the centroid O of the first projection to the centroid P 'of the projection of the ear canal opening on the sagittal plane is approximately inversely related to the sound pressure level at the ear canal opening of the user, and when the distance between the centroid O of the first projection of the sound emitting part 11 on the sagittal plane and the centroid P' of the projection of the ear canal opening on the sagittal plane is too small, the overlapping ratio of the area of the first projection of the sound emitting part 11 on the sagittal plane to the area of the projection of the ear canal opening on the sagittal plane is too large, the sound emitting part 11 may cover the ear canal opening of the user, affecting the user to obtain sound information in the external environment. Considering that the position of the ear canal opening of the human ear is fixed relative to the auricle, in some embodiments the position of the sound emitting part 11 relative to the auricle and the ear canal opening when worn may also be reflected by the ratio of the distance of the centroid O of the first projection to the centroid P' of the projection of the ear canal opening in the sagittal plane to the distance of the projection of the centroid O of the first projection to the contour of the second projection in the sagittal plane. For example, the smaller the ratio, the closer the centroid O of the first projection is to the ear canal opening. In some embodiments, to ensure a listening effect at the user's ear canal opening and to keep the ear canal opening open for obtaining sound information in the external environment, the ratio of the distance P' of the centroid O of the first projection to the centroid of the projection of the ear canal opening in the sagittal plane to the distance of the projection of the centroid of the first projection to the contour of the second projection in the sagittal plane may be between 0.13-0.55. Preferably, the ratio of the distance P 'from the centroid of the first projection to the centroid of the projection of the ear canal opening in the sagittal plane to the distance from the centroid of the first projection to the projection of the contour of the second projection in the sagittal plane may be between 0.2 and 0.5, where the sound information in the external environment is obtained by adjusting the ratio range of the distance P' from the centroid of the first projection to the centroid of the projection of the ear canal opening in the sagittal plane to the distance from the centroid of the first projection to the projection of the contour of the second projection in the sagittal plane, so that the distance between the sound emitting hole of the sound emitting part and the ear canal opening is further reduced on the premise that the sound emitting part does not cover the ear canal opening as much as possible, thereby ensuring that the ear canal opening of the user has a better listening effect and keeping the ear canal opening in an open state. More preferably, the ratio of the distance P 'from the centroid of the first projection O to the centroid of the projection of the ear canal opening in the sagittal plane to the distance from the centroid of the first projection to the centroid of the projection of the contour of the second projection in the sagittal plane may be between 0.25 and 0.45, where the ratio of the distance P' from the centroid of the first projection O to the centroid of the projection of the ear canal opening in the sagittal plane to the distance from the centroid of the first projection to the projection of the contour of the second projection in the sagittal plane is adjusted to a suitable range, so as to further improve the sound effect at the ear canal opening of the user while ensuring that the ear canal opening remains open for obtaining sound information in the external environment.
In some embodiments, consider that when the user wears the earphone 10, if the distance between the centroid O of the first projection and the projection of the first portion 121 of the ear hook on the sagittal plane is too large, the problem of wearing instability (where the sound emitting portion 11 and the ear hook cannot form an effective grip on the ear) and the problem that the sound emitting portion 11 cannot effectively extend into the concha cavity may occur, and if the distance is too small, the relative position between the sound emitting portion 11 and the concha cavity and the ear meatus of the user may be affected, and the problem that the sound emitting portion 11 or the ear hook presses the ear may also result in poor wearing comfort. Based on this, to avoid the foregoing problems, in some embodiments, the centroid O of the first projection may be in the range of 18mm-43mm from the projection of the first portion 121 of the earhook onto the sagittal plane. By controlling the distance to be 18mm-43mm, the ear hook and the ear of the user can be well attached, meanwhile, the sound emitting part 11 is guaranteed to be just located at the position of the concha cavity of the user, and an acoustic model shown in fig. 4 can be formed, so that sound output by the sound emitting part 11 can be well transmitted to the user. Preferably, in order to further enhance the wearing stability of the earphone and to ensure the listening effect of the sound emitting portion 11 at the ear canal opening, in some embodiments, the centroid O of the first projection may be in the range of 20mm-41mm from the projection of the first part 121 of the ear hook on the sagittal plane. More preferably, the centroid O of the first projection may be in the range of 22mm-40.5mm from the projection of the first portion 121 of the earhook onto the sagittal plane. As a specific example, the minimum distance d3 of the projection of the centroid O of the first projection onto the sagittal plane of the user from the projection of the first part 121 of the ear hook onto this sagittal plane may be 21mm and the maximum distance d4 of the projection of the centroid O of the first projection onto the sagittal plane of the user from the projection of the first part 121 of the ear hook onto this sagittal plane may be 41.2mm.
In some embodiments, the distance between the sound emitting part 11 and the ear hook may vary somewhat between the worn state and the unworn state (typically the distance in the unworn state is smaller than the distance in the worn state) due to the elasticity of the ear hook itself. Illustratively, in some embodiments, the projected centroid of the sound emitting portion 11 onto a particular reference plane may be in the range of 15mm-38mm from the projection of the first portion 121 of the earhook onto that particular reference plane when the earphone 10 is in the unworn state. Preferably, the centroid of the projection of the sound emitting part 11 on a specific reference plane may be in the range of 16mm-36mm from the projection of the first part 121 of the ear hook on the specific reference plane when the earphone 10 is in the unworn state. In some embodiments, by making the projected centroid of the sound emitting portion on the specific reference plane and the projected distance of the first portion 121 of the ear hook on the specific reference plane slightly smaller than in the unworn state, the ear hook of the earphone 10 can generate a certain clamping force to the ear of the user when in the worn state, so that the stability of the earphone when worn by the user is improved without affecting the wearing experience of the user. In some embodiments, the particular reference plane may be a sagittal plane, where in the unworn state, the centroid of the projection of the sound emitting portion at the sagittal plane may be analogous to the centroid of the projection of the sound emitting portion at the particular reference plane. For example, the non-wearing state here may be represented by removing auricle structures in the human head model, and fixing the sound emitting portion to the human head model in the same posture as in the wearing state with a fixing member or glue. In some embodiments, the particular reference surface may be an ear-hook plane. The ear hook structure is an arc structure, and the plane of the ear hook is a plane formed by three points which are most outwards protruded on the ear hook, namely, the plane for supporting the ear hook when the ear hook is freely placed (i.e. is not acted by external force). For example, when the ear-hook is freely placed on a horizontal surface, which may be considered as an ear-hook plane, the horizontal surface supports the ear-hook. In other embodiments, an ear-hook plane may also refer to a plane formed by a bisector bisecting or substantially bisecting the ear-hook along its length. In the wearing state, although the plane of the ear hook is at a certain angle relative to the sagittal plane, the ear hook can be approximately regarded as fitting with the head, so that the angle is small, and for convenience of calculation and description, the plane of the ear hook is taken as a specific reference plane instead of the sagittal plane.
Fig. 15 is an exemplary wearing schematic diagram of headphones according to further embodiments of the present description.
Referring to fig. 15, in some embodiments, the projection of the sound emitting portion on the sagittal plane may have a portion that overlaps with the projection of the user's concha cavity (e.g., the dashed line portion in fig. 15) on the sagittal plane, that is, the portion or the entirety of the sound emitting portion covers the concha cavity when the user wears the headset, and the centroid O of the first projection is located within the projection area of the user's concha cavity on the sagittal plane when the headset is in the worn state. The position of the centroid O of the first projection is related to the size of the sound generating portion, for example, when the size of the sound generating portion 11 in the long axis direction Y or the short axis direction Z is too small, the volume of the sound generating portion 11 is relatively small, so that the diaphragm area set inside the sound generating portion is relatively small, the efficiency of the diaphragm pushing the air inside the casing of the sound generating portion 11 to generate sound is low, the acoustic output effect of the earphone is affected, and when the size of the sound generating portion 11 in the long axis direction Y or the short axis direction Z is too large, the sound generating portion 11 exceeds the range of the concha cavity and cannot extend into the concha cavity, and a cavity-like structure cannot be formed, or the total size of a gap formed between the sound generating portion 11 and the concha cavity is large, so that the sound volume of the earphone 10 worn by a user at the ear level and the far field is affected. In some embodiments, in order for the user to have a good acoustic output quality while wearing the headset 10, the centroid O of the first projection may be in the range of 4mm-25mm from the projection of the user's concha cavity edge onto the sagittal plane. Preferably, the projection of the centroid of the first projection onto the sagittal plane of the user may be in the range of 6mm-20mm from the projection of the edge of the concha cavity of the user onto the sagittal plane. More preferably, the first projection may have a centroid projected onto the sagittal plane of the user and a centroid projected onto the sagittal plane of the user's concha cavity edge may be in the range of 10mm-18mm. By way of specific example, in some embodiments, the minimum distance d5 of the centroid of the first projection from the projection of the user's concha cavity edge onto the sagittal plane may be 5mm and the maximum distance d6 of the centroid of the first projection from the projection of the user's concha cavity edge onto the sagittal plane may be 24.5mm. In some embodiments, by controlling the distance between the centroid of the first projection and the projection of the edge of the concha cavity of the user on the sagittal plane to be 4mm-25mm, at least part of the structure of the sound generating part 11 covers the concha cavity, so that a cavity-like acoustic model is formed with the concha cavity, and therefore, not only can sound output by the sound generating part be well transmitted to the user, but also the wearing stability of the earphone 10 can be improved through acting force of the concha cavity on the sound generating part 11.
The positional relationship between the sound emitting portion 11 and the auricle or concha cavity in the embodiment of the present specification can be determined by the following exemplary method: first, a photograph of a model of a human head with an ear is taken in a direction facing the sagittal plane at a specific location, and concha cavity edges and auricle contours (e.g., inner and outer contours) are identified, and these identified contours can be regarded as projection contours of the respective configurations of the ear in the sagittal plane; then, a photograph of wearing the earphone on the human head model is taken at the same angle at the specific position, and the outline of the sound emitting part is marked, wherein the outline can be regarded as the projection of the sound emitting part on the sagittal plane, and the position relation between the sound emitting part (such as the centroid, the tail end and the like) and the edge of the concha cavity and the auricle can be determined through comparative analysis.
Fig. 16A is an exemplary structural diagram of an earphone provided in some embodiments of the present specification, and fig. 16B is a schematic diagram of a user wearing the earphone provided in accordance with some embodiments of the present specification. As shown in fig. 16A and 16B, the earphone 10 may include a hanging structure 12, a sound emitting part 11, and a battery compartment 13, wherein the sound emitting part 11 and the battery compartment 13 are respectively located at both ends of the hanging structure 12. In some embodiments, the hanging structure 12 may be an ear hook as shown in fig. 16A or 16B, where the ear hook may include a first portion 121 and a second portion 122 connected in sequence, the first portion 121 may be hung between a rear inner side surface of an auricle of a user and a head portion, and extend along the rear inner side surface of the auricle toward a neck, and the second portion 122 may extend toward a front outer side surface of the auricle and connect with the sound emitting portion 11, so that the sound emitting portion 11 is worn near an ear canal of the user but does not block an ear canal opening, one end of the first portion 121 away from the sound emitting portion 11 is connected with the battery compartment 13, and a battery electrically connected with the sound emitting portion 11 is disposed in the battery compartment 13. In some embodiments, the ear hook is an arc structure adapted to the connection between the auricle and the head of the human body, when the earphone 10 is worn by the user, the sound generating part 11 and the battery compartment 13 may be located on the front outer side surface and the rear inner side surface of the auricle, respectively, where the sound generating part 11 extends toward the first portion 121 of the ear hook, so that the whole or part of the structure of the sound generating part 11 extends into the concha cavity and forms a cavity-like structure in cooperation with the concha cavity. When the dimension (length) of the first portion 121 in the extending direction thereof is too small, the battery compartment 13 may be located near the top of the auricle of the user, and at this time, the first portion 121 and the second portion 121 may not provide the earphone 10 with a sufficient contact area with the ear and/or the head, resulting in that the earphone 10 is easily detached from the ear, so that the length of the first portion 121 of the ear hook needs to be long enough to ensure that the ear hook may provide a sufficient contact area with the ear and/or the head, thereby increasing the resistance of the earphone to detachment from the ear and/or the head of the human body. In addition, when the distance between the tip of the sound emitting portion 11 and the first portion 121 of the ear hook is too large, the battery compartment 13 is far from the auricle in the worn state, and a sufficient clamping force cannot be provided to the earphone, and falling easily occurs. When the distance between the tip of the sound emitting part 11 and the first part 121 of the ear hook is too small, the battery compartment 13 or the sound emitting part 11 presses the auricle, and the comfort of the user is affected by wearing for a long time. Taking the ear-wearing of the ear-piece by the user as an example, the length of the first part 121 in the ear-hook in its extending direction and the distance between the end of the sound-generating part 11 and the first part 121 can be characterized by the distance between the centroid O of the projection of the sound-generating part 11 on the sagittal plane (i.e. the first projection) and the centroid Q of the projection of the battery compartment 13 on the sagittal plane, in order to ensure that the ear-hook can provide a sufficiently large contact area for the ear and/or the head, the distance between the centroid Q of the projection of the battery compartment 13 on the sagittal plane with respect to the horizontal plane (e.g. the ground plane) is smaller than the distance between the centroid O of the projection of the sound-generating part 11 on the sagittal plane, i.e. the centroid Q of the projection of the battery compartment 13 on the sagittal plane is located below the centroid O of the projection of the sound-generating part 11 on the sagittal plane in the wearing state. In the wearing state, the position of the sounding part 11 needs to be partially or wholly stretched into the concha cavity, the position of the sounding part is relatively fixed, if the distance between the projected centroid O of the sounding part 11 on the sagittal plane and the projected centroid Q of the battery compartment 13 on the sagittal plane is too small, the battery compartment 13 can be tightly clung to or even pressed on the inner side surface behind the auricle, so that the wearing comfort of a user is affected, and when the distance between the projected centroid O of the sounding part 11 on the sagittal plane and the projected centroid Q of the battery compartment 13 on the sagittal plane is too large, the length of the first part 121 in the ear hook is also longer, so that the user obviously feels that the earphone part positioned on the inner side surface behind the auricle is sunk when wearing or the position of the battery compartment 13 is far relative to the auricle, the user easily falls off when moving, and the wearing comfort of the user and the stability of the earphone when wearing are affected. In order to provide a user with a better stability and comfort when wearing the earphone 10, the fourth distance d8 between the centroid O of the projection of the sound generating part 11 on the sagittal plane and the centroid Q of the projection of the battery compartment 13 on the sagittal plane is in the range of 20mm-30mm in the worn state. Preferably, the fourth distance d8 between the centroid O of the projection of the sound generating portion 11 on the sagittal plane and the centroid Q of the projection of the battery compartment 13 on the sagittal plane is in the range of 22mm-28mm. More preferably, the fourth distance d8 between the centroid O of the projection of the sound generating portion 11 on the sagittal plane and the centroid Q of the projection of the battery compartment 13 on the sagittal plane is in the range of 23mm-26mm. Due to the elasticity of the ear hook itself, the distance between the centroid O of the projection of the sound generating portion 11 on the sagittal plane and the centroid Q of the projection of the battery compartment 13 on the sagittal plane will vary in the worn state and in the unworn state of the earphone 10. In some embodiments, the third distance d7 between the centroid of the projection of the sound emitting portion 11 at the particular reference plane and the centroid of the projection of the battery compartment 13 at the particular reference plane in the unworn state is in the range of 16.7mm-25mm. Preferably, in the unworn state, the third distance d7 between the centroid of the projection of the sound generating portion 11 on the specific reference plane and the centroid of the projection of the battery compartment 13 on the specific reference plane is in the range of 18mm to 23mm. More preferably, in the unworn state, the third distance d7 between the centroid of the projection of the sound emitting portion 11 on the specific reference surface and the centroid of the projection of the battery compartment 13 on the specific reference surface ranges from 19.6mm to 21.8mm. In some embodiments, the particular reference plane may be a sagittal plane of the human body or an ear-hook plane. In some embodiments, the particular reference plane may be a sagittal plane, where in the unworn state, the centroid of the projection of the sound emitting portion in the sagittal plane may be analogous to the centroid of the projection of the sound emitting portion in the particular reference plane, and the centroid of the projection of the battery compartment in the sagittal plane may be analogous to the centroid of the projection of the battery compartment in the particular reference plane. For example, the non-wearing state here may be represented by removing auricle structures in the human head model, and fixing the sound emitting portion to the human head model in the same posture as in the wearing state with a fixing member or glue. In some embodiments, the particular reference surface may be an ear-hook plane. The ear hook structure is an arc-shaped structure, and the plane of the ear hook is a plane formed by three points which are most outwards protruded on the ear hook, namely, a plane for supporting the ear hook when the ear hook is freely placed. For example, when the ear hook is placed on a horizontal surface, which may be considered as an ear hook plane, the horizontal surface supports the ear hook. In other embodiments, an ear-hook plane may also refer to a plane formed by a bisector bisecting or substantially bisecting the ear-hook along its length. In the wearing state, although the plane of the ear hook is at a certain angle relative to the sagittal plane, the ear hook can be approximately regarded as fitting with the head, so that the angle is small, and for convenience of calculation and description, the plane of the ear hook is taken as a specific reference plane instead of the sagittal plane.
Taking a specific reference plane as a sagittal plane as an example, in the wearing state and in the unworn state of the earphone 10, the distance between the centroid O of the projection of the sound generating portion 11 in the sagittal plane and the centroid Q of the projection of the battery compartment 13 in the sagittal plane may vary, and the variation value may reflect the softness of the ear hook. When the softness of the ear-hook is too big, the overall structure and the form of the earphone 10 are unstable, the sounding part 11 and the battery compartment 13 cannot be supported strongly, the wearing stability is poor, the falling off easily occurs, the fact that the ear-hook needs to be hung at the junction of the auricle and the head is considered, the earphone 10 is not easy to deform when the softness of the ear-hook is too small, and when a user wears the earphone, the ear-hook can be tightly attached to or even pressed on the area between the ears and/or the head of a human body, so that the wearing comfort is affected. In order to provide better stability and comfort when the earphone 10 is worn by a user, in some embodiments, a ratio of a distance variation value of a centroid O of a projection of the sound generating portion 11 in a sagittal plane of the earphone 10 in a wearing state and a non-wearing state to a distance of a centroid Q of a projection of the sound generating portion 11 in a sagittal plane of the battery compartment 13 in a non-wearing state to a centroid Q of a projection of the sound generating portion 11 in a sagittal plane of the earphone is in a range of 0.3-0.8. Preferably, the ratio of the value of the change in the distance between the centroid O of the projection of the sound emitting portion 11 in the sagittal plane and the centroid Q of the projection of the battery compartment 13 in the sagittal plane of the putting-on earphone 10 in the wearing state and the distance between the centroid O of the projection of the sound emitting portion 11 in the sagittal plane and the centroid Q of the projection of the battery compartment 13 in the sagittal plane of the earphone in the non-wearing state is in the range of 0.45-0.68.
It should be noted that, for the shape of the projection of the battery compartment 13 on the sagittal plane and the content of the centroid Q, reference is made to the description in the present specification regarding the shape of the projection of the sound emitting portion 11 on the sagittal plane and the centroid O. In addition, the battery compartment 13 and the first portion 121 of the ear hook may be independent structures, and the battery compartment 13 and the first portion 121 of the ear hook may be connected by an embedding, clamping, or other manner, so that a splice point or a splice line between the battery compartment 13 and the first portion 121 may be used to more accurately obtain the projection of the battery compartment 13 on the sagittal plane when determining the projection of the battery compartment 13.
In some embodiments, the sound emitting portion 11 may be a cuboid, cuboid-like, cylinder, ellipsoid, or other regular and irregular solid structure. When the sound generating portion 11 extends into the concha cavity, since the overall outline of the concha cavity is of an irregular structure like an arc, the sound generating portion 11 and the outline of the concha cavity are not completely covered or attached, so as to form a plurality of gaps, the overall size of the gaps can be approximately regarded as the opening S of the leakage structure in the cavity-like model shown in fig. 6, the size of the attached or covered sound generating portion 11 and the outline of the concha cavity can be approximately regarded as the non-perforated area S0 in the cavity-like structure shown in fig. 6, and as shown in fig. 7, the larger the relative opening size S/S0 is, the smaller the hearing index is. This is because the larger the relative opening, the more sound components the contained sound source radiates directly outward, and the less sound reaches the listening position, resulting in a decrease in listening volume with an increase in the relative opening, which in turn results in a decrease in the listening index. In some embodiments, the size of the gap formed between the sound generating portion 11 and the concha cavity needs to be as small as possible while ensuring that the auditory canal is not blocked, so that the overall volume of the sound generating portion 11 is not too large or too small, and therefore, on the premise that the overall volume or shape of the sound generating portion 11 is specific, the wearing angle of the sound generating portion 11 relative to the auricle and the concha cavity needs to be considered. For example, when the sound emitting portion 11 is of a cuboid-like structure, when the user wears the earphone 10, the upper side wall 111 (also referred to as an upper side surface) or the lower side wall 112 (also referred to as a lower side surface) of the sound emitting portion 11 is disposed parallel or approximately parallel to a horizontal plane and disposed vertically or approximately vertically (it is also understood that the projection of the upper side wall 111 or the lower side wall 112 of the sound emitting portion 11 on the sagittal plane is disposed parallel or approximately parallel to the sagittal axis and disposed vertically or approximately vertically), a gap with a larger size is formed when the sound emitting portion 11 is attached to or covers a part of the concha cavity, so as to affect the volume of the user's listening sound. As shown in fig. 17, in order to make the whole or part of the area of the sound generating portion 11 extend into the concha cavity and increase the area of the sound generating portion 11 covering the concha cavity, the size of the gap formed between the sound generating portion 11 and the edge of the concha cavity is reduced, the volume of the sound of the ear canal opening is increased, and in some embodiments, the projection of the upper side wall 111 or the lower side wall 112 of the sound generating portion 11 on the sagittal plane in the wearing state of the earphone 10 may have an inclination angle α ranging from 10 ° to 28 ° with respect to the horizontal direction. Preferably, the projection of the upper side wall 111 or the lower side wall 112 of the sound generating part 11 on the sagittal plane may have an inclination angle α ranging from 13 ° to 21 ° with respect to the horizontal direction in the wearing state of the earphone 10. More preferably, the projection of the upper side wall 111 or the lower side wall 112 of the sound generating part 11 on the sagittal plane may have an inclination angle α ranging from 15 ° to 19 ° with respect to the horizontal direction in the wearing state of the earphone 10. It should be noted that the projection of the upper side wall 111 of the sound generating part 11 on the sagittal plane may have the same or different inclination from the horizontal direction as the projection of the lower side wall 112 on the sagittal plane. For example, when the upper side wall 111 and the lower side wall 112 of the sound emitting portion 11 are parallel, the projection of the upper side wall 111 on the sagittal plane is the same as the inclination of the horizontal direction and the projection of the lower side wall 112 on the sagittal plane is the same as the inclination of the horizontal direction. For another example, when the upper side wall 111 and the lower side wall 112 of the sounding portion 11 are not parallel, or one of the upper side wall 111 or the lower side wall 112 is a planar wall and the other is a non-planar wall (e.g., a curved wall), the inclination angle of the projection of the upper side wall 111 on the sagittal plane and the inclination angle of the projection of the lower side wall 112 on the sagittal plane are the same. In addition, when the upper sidewall 111 or the lower sidewall 112 is curved, the projection of the upper sidewall 111 or the lower sidewall 112 on the sagittal plane may be a curve or a broken line, and at this time, the angle between the projection of the upper sidewall 111 on the sagittal plane and the horizontal may be the angle between the tangent line of the point with the largest distance between the curve or the broken line and the ground plane and the horizontal, and the angle between the tangent line of the point with the smallest distance between the projection of the lower sidewall 111 on the sagittal plane and the horizontal may be the angle between the tangent line of the point with the smallest distance between the curve or the broken line and the ground plane and the horizontal. In some embodiments, when the upper sidewall 111 or the lower sidewall 112 is curved, a tangent line parallel to the long axis Y on the projection thereof may be selected, and the angle between the tangent line and the horizontal represents the inclination angle between the projection of the upper sidewall 111 or the lower sidewall 112 on the sagittal plane and the horizontal.
It should be noted that, in the embodiment of the present disclosure, one end of the sound generating portion 11 is connected to the second portion 122 of the suspension structure, the end may be referred to as a fixed end, and the end of the sound generating portion 11 facing away from the fixed end may be referred to as a free end or a terminal end, where the terminal end of the sound generating portion 11 faces the first portion 121 of the ear hook. In the wearing state, the suspension structure 12 (e.g., an ear hook) has an upper peak (e.g., an upper peak T1 shown in fig. 16B), that is, a position at a highest distance from the horizontal plane, the upper peak T1 being near the junction of the first portion 121 and the second portion 122, the upper side wall being one side wall (e.g., the upper side wall 111 shown in fig. 16B and 17) of the sound emitting portion 11 other than the fixed end and the distal end, and having a center point (e.g., a geometric center point) at a minimum distance from the ear hook upper peak in the vertical axis direction. Correspondingly, the lower side wall is the side wall opposite to the upper side wall of the sound emitting portion 11, that is, the side wall center point (for example, geometric center point) of the sound emitting portion 11 other than the fixed end and the tip end is the side wall (for example, the lower side wall 112 shown in fig. 16B and 17) having the largest distance from the upper peak of the ear hook in the vertical axis direction.
The whole or part of the sound generating part 11 extends into the concha cavity to form a cavity-like structure as shown in fig. 4, and the sound receiving effect of the user wearing the earphone 10 is related to the size of a gap formed between the sound generating part 11 and the edge of the concha cavity, and the smaller the size of the gap is, the larger the volume of sound receiving at the opening of the auditory canal of the user is. The size of the gap formed between the sound emitting portion 11 and the edge of the concha cavity is related to the size of the sound emitting portion 11, for example, when the size of the sound emitting portion 11 (particularly, the size along the short axis direction Z shown in fig. 18) is too small, in addition to the inclination of the projection of the upper side wall 111 or the lower side wall 112 of the sound emitting portion 11 on the sagittal plane to the horizontal plane, the gap formed between the sound emitting portion 11 and the edge of the concha cavity may be too large, affecting the volume of listening sound at the user's meatus. When the size of the sound generating portion 11 (especially, the size along the short axis direction Z shown in fig. 18) is too large, the portion of the sound generating portion 11 that can extend into the concha cavity may be small or the sound generating portion 11 may completely cover the concha cavity, at this time, the ear canal opening is blocked, and communication between the ear canal opening and the external environment cannot be achieved, which does not achieve the design of the earphone itself. In addition, the oversized sound emitting part 11 affects the wearing comfort of the user and the convenience when carrying around. As shown in fig. 18, the ratio of the distance from the midpoint of the projection of the upper side wall 111 and the lower side wall 112 of the sound generating portion 11 on the sagittal plane to the highest point of the second projection to the distance from the centroid O of the first projection to the highest point of the second projection may reflect the size of the sound generating portion 11 in the short axis direction Z (the direction indicated by the arrow Z shown in fig. 18) and the position of the sound generating portion 11 with respect to the concha chamber. For example, when the dimension of the sounding part 11 in the short axis direction Z is fixed, the farther the sounding part 11 is from the highest point of the auricle, the greater the ratio of the distance from the midpoint C1 of the projection of the upper side wall 111 of the sounding part 11 on the sagittal plane to the distance from the centroid O of the first projection to the highest point A1 of the second projection to the distance from the midpoint C2 of the projection of the lower side wall 112 of the sounding part 11 on the sagittal plane to the highest point A1 of the second projection to the distance from the centroid O of the first projection to the highest point A1 of the second projection; similarly, when the distance from the centroid O of the first projection formed by the sounding part 11 to the highest point A1 of the second projection formed by the auricle is fixed, the larger the dimension of the sounding part 11 in the short axis direction Z is, the smaller the ratio of the distance from the midpoint C1 of the projection of the upper side wall 111 of the sounding part on the sagittal plane to the distance from the centroid O of the first projection to the highest point A1 of the second projection is, and the larger the ratio of the distance from the midpoint C2 of the projection of the lower side wall 112 of the sounding part 11 on the sagittal plane to the distance from the centroid O of the first projection to the highest point A1 of the second projection is. To ensure that the earphone 10 does not block the user's ear canal opening while improving the listening effect of the earphone 10, in some embodiments, the ratio of the distance from the midpoint C1 of the projection of the upper side wall 111 of the sound emitting part to the highest point A1 of the second projection to the distance from the centroid O of the first projection to the highest point A1 of the second projection may be in the range of 0.75-0.9, or the ratio of the distance from the midpoint C2 of the projection of the lower side wall 112 of the sound emitting part 11 to the highest point A1 of the second projection to the distance from the centroid O of the first projection to the highest point A1 of the second projection may be in the range of 1.1-1.35, described with reference to the upper side wall 111 of the sound emitting part. Preferably, the ratio of the distance from the midpoint C1 of the projection of the upper side wall 111 of the sound generating part to the highest point A1 of the second projection on the sagittal plane to the distance from the centroid O of the first projection to the highest point A1 of the second projection may be in the range of 0.78-0.85, or the ratio of the distance from the midpoint C2 of the projection of the lower side wall 112 of the sound generating part 11 to the highest point A1 of the second projection to the distance from the centroid O of the first projection to the highest point A1 of the second projection may be in the range of 1.15-1.3, where the ratio of the distance from the midpoint C1 of the projection of the upper side wall 111 of the sound generating part to the highest point A1 of the second projection to the distance from the centroid O of the first projection to the highest point A1 of the second projection or the distance from the midpoint C2 of the lower side wall 112 of the sound generating part 11 to the highest point A1 of the second projection to the auditory meatus of the first projection is adjusted, so that the acoustic meatus can be kept open to the auditory meatus in a state of the auditory meatus of the user, and the acoustic meatus can be kept in a state of the acoustic meatus is further opened to the acoustic meatus.
In some embodiments, the midpoint of the projection of the upper and lower sidewalls 111, 112 of the sound emitting portion 11 on the sagittal plane from the highest point of the second projection may also reflect the size of the sound emitting portion 11 in the short axis direction Z (the direction indicated by arrow Z shown in fig. 18) and the position of the sound emitting portion 11 relative to the concha cavity. To ensure that the earphone 10 does not block the user's ear canal opening while improving the listening effect of the earphone 10, in some embodiments, the distance d10 between the midpoint C1 of the projection of the upper side wall 111 of the sound emitting part 11 on the sagittal plane and the highest point A1 of the second projection ranges from 20mm to 38mm, and the distance d11 between the midpoint C2 of the projection of the lower side wall 112 of the sound emitting part 11 on the sagittal plane and the highest point A1 of the second projection ranges from 32mm to 57mm. Preferably, the distance d10 between the midpoint C1 of the projection of the upper side wall 111 of the sound generating part 11 on the sagittal plane and the highest point A1 of the second projection ranges from 24mm to 36mm, and the distance d11 between the midpoint C2 of the projection of the lower side wall 112 of the sound generating part 11 on the sagittal plane and the highest point A1 of the second projection ranges from 36mm to 54mm. More preferably, the distance between the midpoint C1 of the projection of the upper side wall 111 of the sound generating part 11 on the sagittal plane and the highest point A1 of the second projection is in the range of 27mm to 34mm, and the distance between the midpoint C2 of the projection of the lower side wall 112 of the sound generating part 11 on the sagittal plane and the highest point A1 of the second projection is in the range of 38mm to 50mm. It should be noted that, when the projection of the upper sidewall 111 of the sound generating portion 11 on the sagittal plane is a curve or a fold line, the midpoint C1 of the projection of the upper sidewall 111 of the sound generating portion 11 on the sagittal plane may be selected by the following exemplary method, two points with the greatest distance between the projections of the upper sidewall 111 on the sagittal plane along the long axis direction may be selected as a line segment, a midpoint on the line segment may be selected as a perpendicular bisector, and a point where the perpendicular bisector intersects the projection is a midpoint of the projection of the upper sidewall 111 of the sound generating portion 11 on the sagittal plane. In some alternative embodiments, the point of the projection of the upper side wall 111 on the sagittal plane that is the smallest in distance from the projection of the highest point of the second projection may be selected as the midpoint C1 of the projection of the upper side wall 111 of the sound generating portion 11 on the sagittal plane. The midpoint of the projection of the lower side wall 112 of the sound generating portion 11 on the sagittal plane is selected in the same manner as described above, and for example, a point at which the distance from the projection of the highest point of the second projection in the projection of the lower side wall 112 on the sagittal plane is largest may be selected as the midpoint C2 of the projection of the lower side wall 112 of the sound generating portion 11 on the sagittal plane.
In some embodiments, the distance of the mid-point of the projection of the upper and lower sidewalls 111, 112 of the sound emitting portion 11 on the sagittal plane from the projection of the supra-aural apex on the sagittal plane may reflect the dimension of the sound emitting portion 11 in the short-axis direction Z (the direction indicated by arrow Z shown in fig. 3). The upper peak of the ear hook may be a position on the ear hook having a maximum distance in the vertical axis direction with respect to a specific point at the neck of the user when the user wears the open-mode earphone, for example, the upper peak T1 shown in fig. 16B. To ensure that the earphone 10 does not block the user's ear canal opening while improving the listening effect of the earphone 10, in some embodiments, the distance d13 between the midpoint C1 of the projection of the upper side wall 111 of the sound generating portion 11 on the sagittal plane and the projection of the upper ear-hook vertex T1 on the sagittal plane is in the range of 17mm-36mm, and the distance between the midpoint C2 of the projection of the lower side wall 112 of the sound generating portion 11 on the sagittal plane and the projection of the upper ear-hook vertex d14 on the sagittal plane is in the range of 28mm-52mm. Preferably, the distance d13 between the midpoint C1 of the projection of the upper side wall 111 of the sound generating part 11 on the sagittal plane and the projection of the upper ear-hook vertex T1 on the sagittal plane ranges from 21mm to 32mm, and the distance d14 between the midpoint C2 of the projection of the lower side wall 112 of the sound generating part 11 on the sagittal plane and the projection of the upper ear-hook vertex T1 on the sagittal plane ranges from 32mm to 48mm. More preferably, the distance d13 between the midpoint C1 of the projection of the upper side wall 111 of the sound generating part 11 on the sagittal plane and the projection of the upper ear-hook vertex T1 on the sagittal plane ranges from 24mm to 30mm, and the distance d14 between the midpoint C2 of the projection of the lower side wall 112 of the sound generating part 11 on the sagittal plane and the projection of the upper ear-hook vertex T1 on the sagittal plane ranges from 35mm to 45mm.
In some embodiments, the distance of the centroid O of the first projection from the projection of the supra-aural vertex T1 in the sagittal plane may also reflect the dimension of the sound emitting portion 11 in the short axis direction Z. To enhance the listening effect of the earphone 10 while ensuring that the earphone 10 does not block the user's ear canal opening, in some embodiments, the centroid O of the first projection may be 29mm-38mm from the projection of the supra-aural vertex T1 in the sagittal plane. Preferably, the projection distance between the centroid O of the first projection and the top point T1 of the ear hook in the sagittal plane may be 32mm-36mm, where by adjusting the projection distance between the centroid O of the first projection and the top point T1 of the ear hook in the sagittal plane, the distance between the sound emitting hole of the sound emitting part and the ear canal opening can be further reduced on the premise that the sound emitting part does not cover the ear canal opening as much as possible, so as to ensure that the ear canal opening of the user has a better listening effect and keep the ear canal opening in an open state to obtain sound information in the external environment. Because the ear hook is of an elastic structure, the distance between the centroid O of the first projection and the projection of the upper peak T1 of the ear hook in the non-wearing state in the sagittal plane is slightly smaller than the distance between the centroid O of the first projection and the projection of the upper peak T1 of the ear hook in the wearing state in the sagittal plane. In some embodiments, the centroid O of the first projection may be 27mm-36mm from the projection of the supra-aural vertex T1 in the sagittal plane in the unworn state. Preferably, in the unworn state, the centroid O of the first projection may be 29mm-35mm from the projection of the supra-aural vertex T1 in the sagittal plane. More preferably, in the unworn state, the centroid O of the first projection may be from 30mm to 34mm from the projection of the supra-aural vertex T1 in the sagittal plane. Regarding the technical effect of the distance of the centroid O of the first projection from the projection of the supra-aural vertex T1 in the sagittal plane in the unworn state, reference may be made to the relevant description in the worn state. It should be noted that, in the unworn state, the distance between the centroid O of the first projection and the projection of the apex T1 of the ear hook on the sagittal plane may be measured by removing the auricle structure in the human head model mentioned in the present specification, and fixing the sound emitting part on the human head model in the same posture as in the wearing state by using a fixing member or glue.
Fig. 19A is an exemplary wearing schematic diagram of headphones according to further embodiments of the present description. Fig. 19B is a schematic diagram of an earphone according to some embodiments of the present disclosure in an unworn state.
Referring to fig. 19A, in some embodiments, in order for the user to wear the headset, a portion or the entire structure of the sound emitting portion may extend into the concha cavity with an angle between the upper side wall 111 of the sound emitting portion 11 and the second portion 122 of the ear hook. The angle may be represented by an angle beta of a tangent 126 that may be projected from the sagittal plane of the upper side wall 111 of the sound emitting portion 11 and projected from the connection of the second portion 122 of the ear hook to the upper side wall 111 of the sound emitting portion 11. Specifically, the upper side wall of the sound generating part 11 and the second part 122 of the ear hook have a connection, and the projection of the connection in the sagittal plane is a point U, and a tangent 126 of the projection of the second part 122 of the ear hook in the sagittal plane is made passing through the point U. When the upper sidewall 111 is curved, the projection of the upper sidewall 111 on the sagittal plane may be a curve or a broken line, and the angle between the projection of the upper sidewall 111 on the sagittal plane and the tangent line 126 may be the angle between the tangent line and the tangent line 126 at the point where the distance between the curve or the broken line and the ground plane is the greatest. In some embodiments, when the upper sidewall 111 is curved, a tangent line parallel to the long axis Y on its projection may be selected, and the angle between the tangent line and the horizontal represents the inclination angle between the projection of the upper sidewall 111 on the sagittal plane and the tangent line 126. In some embodiments, the included angle β may be in the range of 100 ° -150 °. Preferably, the angle β may be in the range of 110 ° -140 °. More preferably, the angle β may be in the range of 120 ° -135 °.
The human head can be regarded as a sphere-like structure, the auricle is a structure protruding outwards relative to the head, and when the user wears the earphone, a part of the area of the ear hook can be attached to the head of the user, so that the sounding part 11 can extend into the concha cavity 102, and a certain inclination angle is formed between the sounding part 11 and the plane of the ear hook. The inclination angle can be expressed by the angle between the plane corresponding to the sound emitting portion 11 and the plane of the ear hook. In some embodiments herein, an ear-hook plane may refer to a plane formed by a bisector bisecting or substantially bisecting the ear-hook along its length extension (e.g., the plane of dashed line 12A in fig. 19B). In some implementations, the plane of the ear hook may also be a plane formed by three points protruding from the ear hook, i.e., a plane that supports the ear hook when the ear hook is freely placed (without external forces). For example, when the ear hook is placed on a horizontal surface, which may be considered as an ear hook plane, the horizontal surface supports the ear hook. In some embodiments, the corresponding plane 11A of the sound emitting portion 11 may include a side wall of the sound emitting portion 11 facing toward the anterior lateral side of the user's auricle (also referred to as a medial side) or a side wall facing away from the anterior lateral side of the user's auricle (also referred to as a lateral side). When the side wall of the sound generating portion 11 facing the front outer side surface of the auricle of the user or the side wall facing away from the front outer side surface of the auricle of the user is a curved surface, the plane corresponding to the sound generating portion 11 may refer to a tangential plane corresponding to the curved surface at the center position or a plane approximately coinciding with a curve defined by the edge contour of the curved surface. Here, taking as an example a case where the sound emitting portion 11 is along a plane 11A of a side wall facing the front outer side of the auricle of the user, an angle θ formed between the plane 11A and the ear-hook plane 12A is an inclination angle of the sound emitting portion 11 with respect to the ear-hook plane. In some embodiments, the included angle θ may be measured by an exemplary method of respectively obtaining, along the short axis direction Z of the sounding part 11, a projection of a side wall (hereinafter referred to as an inner side surface) of the sounding part 11 near to the ear hook on the X-Y surface and a projection of the ear hook on the X-Y surface, selecting two points, which are most protruding, on a side of the projection of the inner side surface of the sounding part 11 near to (or away from) the X-Y surface, as a first straight line, where when the projection of the inner side surface of the sounding part 11 on the X-Y surface is a straight line, the included angle between the first straight line and the projection of the inner side surface on the X-Y surface is the included angle θ. When the inner surface of the sound generating portion 11 is curved, the angle between the first straight line and the long axis direction Y can be approximately regarded as the angle θ. It should be noted that, the above method may be used to measure the inclination angle θ of the sound emitting portion 11 with respect to the plane of the ear hook in both the wearing state and the wearing state of the earphone, and the difference is that the above method may be directly used to measure in the unworn state, and the above method may be used to measure in the wearing state of the earphone worn on the model of the human head or the model of the ear. Considering that the contact area between the sounding part 11 and the front outer side surface of the auricle of the user is small due to the overlarge angle, enough contact resistance cannot be provided, the user easily falls off when wearing the ear shell, and in addition, the gap size in the cavity-like structure formed between the sounding part 11 and the concha cavity 102 of the user is inevitably overlarge, so that the hearing volume of the ear canal opening of the user is affected. And the angle is too small, so that the sounding part 11 can not effectively extend into the concha cavity when a user wears the ear nail. To ensure that the user can have a good listening effect while wearing the earphone 10, and to ensure stability when wearing, in some embodiments, the inclination angle θ of the sound emitting portion 11 with respect to the plane of the ear hook may be in the range of 15 ° -28 ° when the earphone is in the wearing state. Preferably, the inclination angle θ of the sound emitting portion 11 with respect to the plane of the ear hook may be in the range of 16 ° to 25 °. More preferably, the sound emitting portion 11 may have an inclination angle θ ranging from 18 ° to 23 ° with respect to the plane of the ear hook.
Since the ear hook itself has elasticity, the inclination angle of the sound emitting portion 11 with respect to the ear hook plane 12A may be changed to some extent in the worn state and in the unworn state, for example, the inclination angle in the unworn state is smaller than that in the worn state. In some embodiments, when the earphone is in the unworn state, the inclination angle of the sound emitting portion 11 relative to the plane of the ear hook may range from 15 ° to 23 °, so that the ear hook of the earphone 10 can generate a certain clamping force on the ear of the user when in the wearing state, and thus the stability of the earphone when worn by the user is improved without affecting the wearing experience of the user. Preferably, in the unworn state, the sound emitting portion 11 may have an inclination angle in the range of 16.5 ° -21 ° with respect to the ear-hook plane 12A. Preferably, the sound emitting portion 11 may be inclined at an angle in the range of 18-20 ° with respect to the plane of the ear hook 12A in the unworn state.
When the size of the sound emitting portion 11 in the thickness direction X is too small, the volumes of the front and rear chambers formed by the diaphragm and the housing of the sound emitting portion 11 are too small, the vibration amplitude of the vibration is limited, and a large sound volume cannot be provided. When the size of the sound emitting portion 11 in the thickness direction X is excessively large, the end FE of the sound emitting portion 11 cannot be completely abutted against the edge of the concha chamber 102 in the wearing state, so that the earphone is easily detached. The side wall of the sound emitting part 11 facing the ear of the user along the coronal axis direction has an inclination angle with the ear hanging plane, and the distance between the furthest point of the sound emitting part 11 from the ear hanging plane and the ear hanging plane is equal to the dimension of the sound emitting part 11 in the thickness direction X. Because the sound emitting portion 11 is disposed obliquely with respect to the plane of the ear hook, the point on the sound emitting portion 11 furthest from the plane of the ear hook may be referred to as the intersection point I of the fixed end, the lower side wall, and the outer side surface of the sound emitting portion 11, which are connected to the ear hook. Further, the extent to which the sound generating part 11 extends into the concha cavity 11 can be judged by the distance between the point, closest to the concha plane, on the sound generating part 11 and the concha plane, and the distance between the point, closest to the concha plane, on the sound generating part 11 and the concha plane is set in a proper range, so that the wearing comfort of a user can be ensured while the small size of a gap formed between the sound generating part 11 and the concha cavity can be ensured. The point on the sound emitting portion 11 closest to the ear-hook plane may be referred to as the intersection point H of the distal end FE, upper side wall, and inner side surface of the sound emitting portion 11. In some embodiments, in order to ensure that the sound generating portion 11 may have a better acoustic output effect and ensure stability and comfort when worn, when the earphone is in a wearing state, a distance between a point I farthest from the ear-hanging plane 12A on the sound generating portion 11 and the ear-hanging plane 12A may be 11.2mm-16.8mm, and a distance between a point H closest to the ear-hanging plane 12A on the sound generating portion 11 and the ear-hanging plane 12A may be 3mm-5.5mm. Preferably, the distance between the point I on the sound emitting part 11, which is farthest from the ear-hanging plane 12A, and the ear-hanging plane 12A may be 12mm-15.6mm, and the distance between the point H on the sound emitting part 11, which is closest to the ear-hanging plane 12A, and the ear-hanging plane 12A may be 3.8mm-5mm. Preferably, the distance between the point I of the sound generating part 11 farthest from the ear-hanging plane 12A and the ear-hanging plane 12A may be 13mm-15mm, and the distance between the point H of the sound generating part 11 closest to the ear-hanging plane 12A and the ear-hanging plane 12A may be 4mm-5mm.
Fig. 20 is an exemplary wearing schematic diagram of headphones according to further embodiments of the present description.
Referring to fig. 20, in some embodiments, in a wearing state of the earphone, at least a portion of the sound generating portion 11 may extend into the concha cavity of the user, so that the wearing stability of the earphone is improved by acting force of the concha cavity on the sound generating portion 11 while ensuring the acoustic output effect of the sound generating portion 11, and at this time, a sidewall of the sound generating portion 11 facing away from the head of the user or toward the ear canal opening of the user may have a certain inclination angle with respect to the auricle surface of the user. The side wall of the sound emitting part 11 facing away from the user's head or toward the user's ear canal opening may be a plane or a curved surface, and when the side wall is a curved surface, the inclination angle of the side wall of the sound emitting part 11 facing away from the user's head or toward the user's ear canal opening with respect to the user's auricle surface may be represented by the inclination angle of the tangential plane (or the plane substantially coincident with the curve formed by the edge profile of the curved surface) corresponding to the curved surface at the central position with respect to the user's auricle surface. It should be noted that, in some embodiments of the present disclosure, the auricle surface of the user may refer to a plane (e.g., a plane in which points D1, D2, and D3 in fig. 15) that is farthest from the sagittal plane of the user from three points in different regions (e.g., the top auricle region, the tragus region, and the antitragus) on the auricle of the user.
Because the projection of the sound generating part 11 on the sagittal plane is far smaller than the projection of the auricle on the sagittal plane, and the concha cavity is a concave cavity in the auricle structure, when the range of the inclination angle of the sound generating part 11 relative to the auricle surface is small, for example, when the side wall of the sound generating part 11 facing away from the head of the user or towards the ear canal opening of the user is approximately parallel to the auricle surface of the user, the sound generating part 11 cannot extend into the concha cavity or the gap size of the cavity-like structure formed between the sound generating part 11 and the concha cavity is very large, and the user cannot obtain a better listening effect when wearing the earphone. Meanwhile, the sound emitting part 11 cannot be abutted against the edge of the concha cavity, and the user is easy to fall off when wearing the earphone. When the range of the inclination angle of the sound emitting portion 11 with respect to the auricle face is large, the sound emitting portion 11 excessively goes deep into the concha cavity and presses the user's ear, and the user may feel a strong uncomfortable feeling when wearing the ear for a long time. In order to ensure the wearing stability and comfort while the user can experience a better acoustic output effect when wearing the earphone, the inclination angle of the side wall of the sound generating part 11 facing away from the head of the user or towards the ear canal opening of the user relative to the auricle surface of the user is 40-60 degrees, and part or the whole structure of the sound generating part 11 can extend into the concha cavity of the user, at this time, the sound generating part 11 can have relatively better acoustic output quality, and the contact force between the sound generating part 11 and the ear canal of the user is relatively moderate, so that the user wears more stably relative to the ear of the user, and the user has more comfortable wearing experience. Preferably, in some embodiments, in order to further optimize the acoustic output quality and wearing experience of the earphone in the worn state, the inclination angle of the sound emitting part 11 thereof with respect to the auricle face may be controlled to be within a range of 42 ° -55 °. More preferably, in some embodiments, in order to further optimize the acoustic output quality and wearing experience of the earphone in the wearing state, the inclination angle range of the sound generating part 11 relative to the auricle surface can be controlled between 44 ° -52 °.
In fig. 15, the auricle face is inclined upward with respect to the sagittal plane, and the inclination angle between the auricle face and the sagittal plane is γ1. In order that the distal end of the sound generating part 11 protrudes into the concha cavity recessed relative to the auricle, the outer side or inner side of the sound generating part 11 is inclined downward relative to the sagittal plane, the inclination angle of the outer side or inner side of the sound generating part 11 to the sagittal plane is γ2, and the included angle of the sound generating part 11 to the auricle plane is the sum of the inclination angle γ1 between the auricle plane and the sagittal plane and the inclination angle γ2 of the long axis direction Y of the sound generating part 11 to the sagittal plane. That is, the inclination angle of the outer side or inner side of the sound emitting portion 11 with respect to the auricle face of the user can be determined by calculating the sum of the angle γ1 between the auricle face and the sagittal face and the angle γ2 between the outer side or inner side of the sound emitting portion 11 and the sagittal face. The inclination angle of the lateral side or the medial side of the sound generating portion 11 with respect to the sagittal plane can be approximately regarded as the inclination angle of the long axis direction Y of the sound generating portion 11 with respect to the sagittal plane. In some embodiments, the calculation may also be performed by the angle between the projection of the auricle face on the plane formed by the T axis and the R axis (hereinafter referred to as T-R face) and the projection of the outer side face or the inner side face of the sound emitting portion 11 on the T-R face. When the outer side surface or the inner side surface of the sound emitting portion 11 is a plane, the outer side surface or the inner side surface of the sound emitting portion 11 is projected as a straight line on the T-R surface, and the angle between the straight line and the projection of the auricle surface on the T-R surface is the inclination angle of the sound emitting portion 11 with respect to the auricle surface. When the outer side surface or the inner side surface of the sound emitting portion 11 is a curved surface, the inclination angle of the sound emitting portion 11 with respect to the auricle surface can be approximately regarded as an angle between the long axis direction Y of the sound emitting portion 11 and the projection of the auricle surface on the T-R surface.
The positional relationship between the sound emitting portion 11 and the auricle, concha cavity, or meatus in the embodiment of the present specification can be determined by the following exemplary method: first, taking a photograph of a model of a human head with an ear in a direction facing the sagittal plane at a specific location, marking the edge of the concha cavity rim, the ear canal mouth contour and the auricle contour (e.g., inner contour and outer contour), these marked contours can be regarded as projection contours of the respective configurations of the ear in the sagittal plane; then, a photograph of wearing the earphone on the human head model is taken at the same angle at the specific position, and the outline of the sound emitting part is marked, wherein the outline can be regarded as the projection of the sound emitting part on the sagittal plane, and the position relation between the sound emitting part (such as the centroid, the tail end and the like) and the edge of the concha cavity, the auditory meatus, the inner outline or the outer outline can be determined through comparative analysis.
The foregoing fig. 3-20 and the corresponding description relate to the case where the entire or part of the sound emitting portion extends into the concha cavity in the wearing state of the earphone, and in some embodiments, the sound emitting portion 11 may not extend into the concha cavity. For example, the sound emitting portion 11 shown in fig. 21 at least partially covers the antihelix region. For another example, the sounding part 11 as shown in fig. 25E covers the antihelix region and is suspended from the concha cavity. The following will specifically describe with reference to fig. 21 to 27B.
Fig. 21 is an exemplary wearing schematic diagram of headphones according to further embodiments of the present description. Referring to fig. 21, in some embodiments, at least a portion of sound emitting portion 11 may cover an anthelix region of the user in a worn state, wherein the anthelix region may include any one or more of anthelix 105, anthelix upper foot 1011, and anthelix lower foot 1012 shown in fig. 1, when sound emitting portion 11 is positioned over concha 102 and the ear meatus, and the ear meatus of the user is in an open state. In some embodiments, the casing of the sound generating part 11 may include at least one sound outlet and a pressure release hole, where the sound outlet is acoustically coupled with the front cavity of the earphone 10, and the pressure release hole is acoustically coupled with the rear cavity of the earphone 10, where the sound output by the sound outlet and the sound output by the pressure release hole may be approximately regarded as two point sound sources, and the sound of the two point sound sources have opposite phases, so as to form a dipole. When the user wears the earphone, the sound outlet is positioned on the side wall of the sound generating part 11 facing or approaching the ear canal opening of the user, and the pressure relief is positioned on the side wall of the sound generating part 11 far away or deviating from the ear canal opening of the user. Here, the housing of the sound generating portion 11 itself may function as a baffle to increase the sound path difference from the sound outlet hole and the pressure release hole to the external auditory meatus 101 to increase the sound intensity at the external auditory meatus 101. Further, in the wearing state, the inner side surface of the sound producing portion 11 is abutted against the auricle region, and the concave-convex structure of the auricle region can also function as a baffle plate, which can increase the sound path of the sound emitted from the pressure release hole to the external auditory meatus 101, thereby increasing the sound path difference from the sound release hole and the pressure release hole to the external auditory meatus 101.
Fig. 22 and 23 are exemplary wearing schematic diagrams of headphones according to further embodiments of the present description. As shown in fig. 22 and 23, in some embodiments, the sound emitting portion may be substantially parallel or at an oblique angle with respect to the horizontal when the earphone 10 is in the worn state. In some embodiments, the sound emitting portion 11 and the auricle of the user have a first projection (the rectangular area shown by the solid line box shown in fig. 22 and 23 is approximately equivalent to the first projection) and a second projection, respectively, on the sagittal plane of the user' S head (for example, reference may be made to the S-T plane in fig. 22 and 23) when the earphone 10 is in the worn state. In order that the whole or part of the structure of the sound emitting part 11 covers the antitragus region of the user (e.g. at the position of the antitragus, the triangle fossa, the upper lobe of the antitragus or the lower lobe of the antitragus), wherein the ratio of the distance h 6 of the centroid O of the first projection to the highest point A6 of the second projection in the vertical axis direction (e.g. the T-axis direction shown in fig. 22 and 23) to the height h of the second projection in the vertical axis direction may be between 0.25 and 0.4, and the ratio of the distance w 6 of the centroid O of the first projection to the end point B6 of the second projection in the sagittal axis direction (e.g. the S-axis direction shown in fig. 22 and 23) (also referred to as the first distance) to the width w of the second projection in the sagittal axis direction may be between 0.4 and 0.6. In some embodiments, the position of the sound emitting part 11 relative to the auricle may also be represented by a distance of the centroid O of the first projection from the highest point A6 of the second projection in the vertical axis and a distance of the centroid O of the first projection from the end point B6 of the second projection in the sagittal axis, in order to make the whole or part of the structure of the sound emitting part 11 cover the antitragus region of the user and to make the sound emitting hole of the sound emitting part 11 close to the ear canal opening, in some embodiments, a distance h 6 (also referred to as a second distance) of the centroid O of the first projection from the highest point A6 of the second projection in the vertical axis may be in the range of 17mm-29mm, and a distance w 6 of the centroid O of the first projection from the end point B6 of the second projection in the sagittal axis may be in the range of 20mm-31 mm.
Considering that the side wall of the sound emitting part 11 is abutted against the antihelix region, in order to make the sound emitting part 11 abutted against the antihelix region of a larger region, the concave-convex structure of the region can also function as a baffle to increase the sound path of sound emitted from the pressure release hole to propagate to the external auditory meatus 101, thereby increasing the sound path difference from the sound release hole and the pressure release hole to the external auditory meatus 101 to increase the sound intensity at the external auditory meatus 101 and simultaneously reduce the volume of far-field leakage sound. In order to ensure the acoustic output quality of the sound emitting unit 11 by combining the volume of sound emitted from the sound emitting unit 11 and the volume of sound emitted from the sound emitting unit 11, the sound emitting unit 11 can be attached to the antihelix region of the user as much as possible. In some embodiments, the distance h 6 between the centroid O of the first projection and the highest point A6 of the second projection in the vertical axis direction and the distance w 6 between the centroid O of the first projection and the end point B6 of the second projection in the sagittal axis direction may be adjusted to ensure the acoustic output quality of the sound emitting portion 11, so that the sound emitting portion 11 may be attached to the antitragus region of the user as much as possible. In some embodiments, the distance h 6 between the centroid O of the first projection and the highest point A6 of the second projection in the vertical axis direction may be in the range of 17mm-29mm, the distance w 6 between the centroid O of the first projection and the end point B6 of the second projection in the sagittal axis direction may be in the range of 20mm-31mm, when the ratio of the distance h 6 between the centroid O of the first projection of the sound generating part 11 on the sagittal plane of the user's head and the highest point A6 of the second projection of the auricle of the user on the sagittal plane to the height h of the second projection in the vertical axis direction is between 0.25-0.4, and the ratio of the distance w 6 between the centroid O of the first projection of the sound generating part 11 on the sagittal plane and the end point B6 of the second projection of the auricle of the user on the sagittal plane in the sagittal axis direction to the width w of the second projection in the sagittal axis direction is between 0.4-0.6. In order to improve wearing comfort of the earphone while ensuring acoustic output quality of the sound emitting portion 11, preferably, a distance h 6 of a centroid O of the first projection from a highest point A6 of the second projection in a vertical axis direction may be in a range of 17mm to 25mm, a distance w 6 of a centroid O of the first projection from a terminal point B6 of the second projection in a sagittal axis direction may be in a range of 21mm to 31mm, a ratio of a distance h 6 of the centroid O of the first projection from the highest point A6 of the second projection in the vertical axis direction to a height h of the second projection in the vertical axis direction may be in a range of 0.25 to 0.35, the ratio of the distance w 6 between the centroid O of the first projection and the end point B6 of the second projection in the sagittal axis direction to the width w of the second projection in the sagittal axis direction (the distance between the end point B6 of the auricle and the front end point B7 of the auricle in fig. 22) may be between 0.42 and 0.6, at this time, more parts of the sound emitting part 11 may be attached to the antitragus region, especially to the upper lobe, the lower lobe and the triangular fossa of the antitragus, the sound emitting part 11 may have a stronger baffle effect than the antitragus region, and at the same time, the end FE of the sound emitting part 11 is closer to the inner contour of the auricle, and the sound short-circuit region between the end FE of the sound emitting part 11 and the inner contour of the auricle is significantly reduced, so that the volume of the listening sound at the auricle is significantly improved. More preferably, the distance h 6 between the centroid O of the first projection and the highest point A6 of the second projection in the vertical axis direction may be in the range of 17mm to 24mm, the distance w 6 between the centroid O of the first projection and the end point B6 of the second projection in the sagittal axis direction may be in the range of 21mm to 28mm, the ratio of the distance h 6 between the centroid O of the first projection and the highest point A6 of the second projection in the vertical axis direction and the height h of the second projection in the vertical axis direction may be between 0.25 and 0.34, and the ratio of the distance w 6 between the centroid O of the first projection and the end point B6 of the second projection in the sagittal axis direction and the width w of the second projection in the sagittal axis direction may be between 0.42 and 0.55. At this time, the sound generating part 11 can be fully attached to the antitragus region, and the sound generating part 11 does not cover the ear canal opening of the user, so that the ear canal opening of the user can be fully opened, and the user can conveniently acquire external sound. In addition, the end FE of the sound generating part 11 may be closer to or abut against the inner contour of the auricle, and the acoustic short-circuit area between the end FE of the sound generating part 11 and the inner contour of the auricle is significantly reduced, so that the volume of the listening sound at the user's ear canal opening is significantly increased. Further, the end FE of the sounding part is close to the inner contour of the auricle, which can provide support for the sounding part 11, improving the stability of the user wearing the device.
Similarly, when there is a difference in the shape and size of the user's ears, the aforementioned ratio range may float over a range. For example, when the ear lobe of the user is longer, the height h of the second projection in the vertical axis direction is larger than that in general, and at this time, when the user wears the earphone 10, the ratio of the distance h 6 between the centroid O of the first projection and the highest point A6 of the second projection in the vertical axis direction to the height h of the second projection in the vertical axis direction becomes smaller, for example, may be between 0.2 and 0.35. Similarly, in some embodiments, when the ear canal of the user is in a forward curved shape, the width w of the second projection in the sagittal direction is smaller than the width w of the first projection in the sagittal direction, and the distance w 6 between the centroid O of the first projection and the end point B6 of the second projection in the sagittal direction is smaller, and in this case, the ratio of the distance w 6 between the centroid O of the first projection and the end point B6 of the second projection in the sagittal direction to the width w of the second projection in the sagittal direction may be larger, for example, between 0.4 and 0.7 when the user wears the earphone 10.
The ear canal opening is in the ear canal opening, and when the user wears the earphone, in order to make the sound outlet of the sound generating part 11 approach the ear canal opening, the sound generating part needs to approach the ear canal opening or be suspended at the ear canal opening to ensure the hearing effect of the user at the ear canal opening. In some embodiments, the overlapping portion of the first projection area of the sound generating portion 11 on the sagittal plane and the projection area of the concha cavity on the sagittal plane may be controlled within a certain range, so as to ensure that the sound outlet is close to the ear canal opening of the user, and simultaneously, the ear canal opening of the user can be kept in a completely and fully opened state. In some embodiments, the extent to which the sound emitting portion 11 covers the concha cavity may be represented by the ratio of the area of the first projection to the overlapping portion of the area of projection of the concha cavity on the sagittal plane to the first projected area. For example, a larger ratio indicates that the portion of the sound emitting portion 11 covering the concha cavity is more. Based on this, in some embodiments, the ratio of the overlapping portion of the area of the first projection and the projected area of the concha cavity on the sagittal plane to the first projected area may be not less than 0.18. Considering that the ratio of the overlapping part of the first projection area and the projection area of the concha cavity on the sagittal plane to the first projection area is larger, the part of the ear canal opening of the user can be covered, the opening degree of the ear canal opening is affected, and further the sound information in the external environment of the user is obtained, the ratio of the overlapping part of the first projection area and the projection area of the concha cavity on the sagittal plane to the first projection area is smaller, the sound emitting hole of the sound emitting part 11 is far away from the ear canal opening, the sound emitting effect of the ear canal opening of the user is affected, preferably, the ratio of the overlapping part of the first projection area and the projection area of the concha cavity on the sagittal plane to the first projection area can be in the range of 0.2-0.8, and the sound emitting hole of the sound emitting part 11 can be close to the ear canal opening of the user on the premise of ensuring that the opening degree of the ear canal opening is larger, so that the sound emitting effect of the ear canal opening of the user is ensured. Preferably, the ratio of the overlapping part of the first projection area and the projection area of the concha cavity on the sagittal plane to the first projection area can be in the range of 0.3-0.7, the ratio of the overlapping part of the first projection area and the projection area of the concha cavity on the sagittal plane to the first projection area is set in a more proper range, and the overall performance of the earphone is improved on the premise of considering the opening degree of the ear canal opening and the approach of the sound emitting part 11 and the sound emitting hole of the sound emitting part 11 to the ear canal opening. Based on the above considerations, it is more preferable that the ratio of the overlapping portion of the area of the first projection and the projected area of the concha cavity on the sagittal plane to the first projected area may be in the range of 0.4-0.6. In some embodiments, the extent to which the sound emitting portion covers the concha chamber may also be reflected by controlling the ratio (also referred to as the overlap ratio) of the area of the first projection to the projected area of the concha chamber on the sagittal plane, as will be further described below in connection with fig. 24.
Fig. 24 is a schematic diagram of an exemplary frequency response curve corresponding to a first projection of the sound generating portion 11 on the sagittal plane and a projection of the concha cavity on the sagittal plane at different overlapping ratios in a wearing manner in which the sound generating portion 11 at least partially covers the antihelix region according to some embodiments of the present specification. In fig. 24, the abscissa represents frequency (unit: hz), and the ordinate represents sound pressure level (unit dB) measured at different frequencies at the ear canal orifice. As can be seen from fig. 24, in a specific experiment, since the three-dimensional structure and the overall size of the sound generating portion 11 are constant, in order to ensure that the area of the first projection of the sound generating portion 11 in the sagittal plane is constant, experimental values of different coverage ratios are obtained by performing translation along the sagittal axis and/or the vertical axis. The position of the sound-emitting part 11 relative to the antihelix region is changed by means of translation, and correspondingly, the effect of the baffle formed by the sound-emitting part 11 and the antihelix region is weakened. In the worn state, the sound outlet is usually provided on the side wall of the sound emitting portion 11 near or toward the ear canal opening, and at this time, if the overlapping ratio of the area of the first projection on the sagittal plane of the sound emitting portion 11 to the area of the projection of the concha cavity on the sagittal plane is larger, this means that the sound outlet of the sound emitting portion 11 is usually closer to the ear canal opening, so that the volume of the listening sound at the ear canal opening can be increased even if the baffle effect on the auricle area and the sound emitting portion 11 is weakened. With continued reference to fig. 24, the overlapping ratio of the area of the first projection of the sound generating portion 11 on the sagittal plane and the area of the projection of the concha cavity on the sagittal plane is not less than 11.82% compared to the overlapping ratio of less than 11.821%, and the volume of the sound at the meatus has a significant increase, that is, the sound generating portion 11 can also generate a better frequency response in the case of covering part of the concha cavity and the antitragus region at the same time. Based on this, in some embodiments, in order to improve the better listening effect when the user wears the earphone, the sounding part 11 needs to cover the antitragus while also satisfying the overlapping ratio of the area of the first projection on the sagittal plane to the area of the projection of the user's concha cavity on the sagittal plane to be not less than 11.82%. Preferably, in some embodiments, the overlapping ratio of the projected area of the first projection of the sound generating portion 11 on the sagittal plane to the projected area of the user's concha cavity on the sagittal plane may be not less than 31.83%. Considering that the overlapping ratio of the area of the first projection of the sound generating part 11 in the sagittal plane and the area of the projection of the concha cavity in the sagittal plane is too large, the sound generating part 11 can cover the meatus, and the meatus can not be kept in a sufficiently open state, so that the user can be influenced to acquire the sound in the external environment. More preferably, in some embodiments, the overlapping ratio of the area of the first projection of the sound generating portion 11 on the sagittal plane to the area of the projection of the user's concha cavity on the sagittal plane may be 11.82% -62.50%. Further preferably, in some embodiments, the overlapping ratio of the area of the first projection of the sound generating portion 11 on the sagittal plane to the area of the projection of the user's concha cavity on the sagittal plane may be 31.83% -50.07%. More preferably, the overlapping ratio of the area of the first projection of the sound generating portion 11 on the sagittal plane and the area of the projection of the user's concha cavity on the sagittal plane may be 35.55% -45%. Note that, in the embodiment of the present disclosure, the frequency response curve corresponding to the overlapping ratio of the measured area of the first projection and the area of the projection of the user's concha cavity on the sagittal plane is measured by changing the wearing position of the sound generating part (for example, translating in the sagittal axis or the vertical axis) when the wearing angle of the sound generating part (the angle between the upper side wall or the lower side wall and the horizontal direction, for example, the angle between the upper side wall and the horizontal direction is 0 °) and the size of the sound generating part are fixed.
In the wearing manner of the sound emitting portion 11 at least partially covering the antitragus of the user, since the sound emitting portion 11 does not extend into the concha cavity of the user, the angle between the sound emitting portion 11 and the sagittal plane may be slightly smaller than the wearing manner of the ear speaker in fig. 3 in which at least part of the sound emitting portion 11 extends into the concha cavity, so in the wearing manner of the ear speaker in which at least part of the sound emitting portion 11 covers the antitragus region of the user, the projection area of the sound emitting portion on the sagittal plane in the ear speaker in fig. 14 may be slightly larger than the projection area of the sound emitting portion on the sagittal plane in the ear speaker in fig. 14, for example, in some embodiments, the first projection area of the sound emitting portion 11 on the sagittal plane may be 236mm 2-565mm2 in the wearing state. In some embodiments, in order to avoid that the area of the first projection of the sound generating portion 11 in the sagittal plane is too small, which results in too bad baffle effect, and at the same time, avoid that the area of the first projection of the sound generating portion 11 in the sagittal plane is too large to cover the meatus of the ear, which affects the user to acquire the sound in the external environment, the area of the first projection of the sound generating portion 11 in the sagittal plane may be between 250mm 2-550mm2 in the wearing state. Preferably, in the wearing state, the area of the first projection of the sound generating part 11 in the sagittal plane may be 270mm 2-500mm2. Preferably, in the wearing state, the area of the first projection of the sound generating part 11 in the sagittal plane may be 290mm 2-450mm2. More preferably, in the wearing state, the area of the first projection of the sound generating part 11 in the sagittal plane may be 320mm 2-410mm2.
Referring to fig. 22, the projection shape of the first projection of the sounding part 11 in the sagittal plane may include a long axis direction Y and a short axis direction Z. In some embodiments, when the size of the sound generating portion 11 in the long axis direction Y or the short axis direction Z is too small, the volume of the sound generating portion 11 is relatively small, so that the area of the diaphragm disposed inside the sound generating portion is also relatively small, which results in low efficiency of pushing the air inside the casing of the sound generating portion 11 to generate sound at low frequency by the diaphragm, and affects the acoustic output effect of the earphone. Further, when the size of the sounding part 11 in the long axis direction Y is too small or the size in the short axis direction Y is too small, the distance between the sounding hole of the sounding part 11 and the pressure release hole is too small, resulting in a small difference in sound path between the sound at the sounding hole and the sound at the pressure release hole, affecting the volume of the sound at the user's ear canal opening. When the dimension of the sound emitting portion 11 in the longitudinal direction Y is too large, the sound emitting portion 11 may protrude from the auricle of the user, and thus the wearing may be uncomfortable. When the size of the sound emitting portion 11 in the longitudinal direction Y is too small, a gap is provided between the end FE of the sound emitting portion 11 and the inner contour 1014 of the auricle, and the sound emitted from the sound emitting hole and the sound emitted from the pressure release hole are subjected to a sound short circuit in the region between the end FE of the sound emitting portion 11 and the inner contour 1014 of the auricle, so that the volume of the sound at the auditory meatus of the user is reduced, and the sound short circuit phenomenon becomes more remarkable as the region between the end FE of the sound emitting portion 11 and the inner contour 1014 of the auricle is larger. When the size of the sound emitting portion 11 in the short axis direction Z is too large, the sound emitting portion 11 may cover the user's ear canal opening, affecting the user to obtain sound information in the external environment. In some embodiments, in order to provide a user with a better acoustic output quality and wearing comfort when wearing the earphone 10, the shape of the first projection may have a size in the long axis direction Y ranging between 21mm and 33 mm. Preferably, the shape of the first projection may have a size in the range of 21.5mm-31mm along the long axis direction Y. More preferably, the shape of the first projection may have a size in the long axis direction Y ranging from 21.5mm to 26.5mm. Correspondingly, in some embodiments, the shape of the first projection ranges from 11mm to 18mm in size along the short axis direction Z. Preferably, the shape of the first projection may have a size in the short axis direction Z in the range of 11.5mm-16.5mm. More preferably, the shape of the first projection may have a size in the short axis direction Z in the range of 11.5mm-16mm. To further illustrate the effect of the shape of the first projection of the sound generating portion 11 in the sagittal plane on the listening effect of the user wearing the earphone, the following is an exemplary description of the ratio of the dimension of the shape of the first projection of the sound generating portion 11 in the sagittal plane along the long axis direction Y to the dimension of the shape of the first projection of the sound generating portion 11 in the sagittal plane along the short axis direction Z.
In the case where the wearing manner is constant (for example, the wearing position and the wearing angle are fixed), the wearing manner in which the sound emitting portion 11 covers the antitragus may be regarded as substantially the same as the wearing manner in which the sound emitting portion 11 extends into the concha cavity as described above, in which the ratio of the dimension of the sound emitting portion 11 in the long axis direction Y to the dimension in the short axis direction Z has an influence on the acoustic output effect of the sound emitting portion 11. When the ratio of the dimension of the sounding part 11 in the first projection of the sagittal plane in the long axis direction Y to the dimension in the short axis direction Z is 1.0-3.0, the frequency response curve of the sounding part 11 as a whole is relatively smoother and has a better frequency response in the middle-low frequency range. When the frequency is in the high frequency range, the larger the ratio of the dimension of the first projection in the long axis direction Y to the dimension in the short axis direction Z is, the faster the sound frequency response of the sound emitting portion 11 at the ear canal opening is reduced. Based on this, in some embodiments, in order to enable a user to experience a better acoustic output effect when wearing the earphone, a ratio of a dimension of the first projection of the sound generating portion 11 on the sagittal plane along the long axis direction Y to a dimension of the projection of the sound generating portion 11 on the sagittal plane along the short axis direction Z may be between 1.0 and 3.0. Similarly, to ensure both stability and comfort of wear, in some embodiments, the ratio of the dimension of the first projection of the sound generating portion 11 on the sagittal plane along the long axis direction Y to the dimension of the projection of the sound generating portion 11 on the sagittal plane along the short axis direction Z may be between 1.4-2.5. Preferably, the ratio of the dimension of the first projection of the sound generating part 11 in the sagittal plane along the long axis direction Y to the dimension of the projection of the sound generating part 11 in the sagittal plane along the short axis direction Z may be between 1.4 and 2.3. More preferably, the ratio of the dimension of the first projection of the sound generating part 11 on the sagittal plane along the long axis direction Y to the dimension of the projection of the sound generating part 11 on the sagittal plane along the short axis direction Z may be between 1.45 and 2.0.
The frequency response curves corresponding to the measured dimensions in the long axis direction and the measured dimensions in the short axis direction in the embodiments of the present disclosure are measured by changing the measured dimensions in the long axis direction and the measured dimensions in the short axis direction when the wearing angle (the angle between the upper side wall or the lower side wall and the horizontal direction) and the wearing position of the sounding part are fixed.
Similarly, in the case where the wearing manner is constant (for example, the wearing position and the wearing angle are fixed), the wearing manner in which the sound emitting portion 11 covers the antitragus may be regarded as the same as the wearing manner in which the sound emitting portion 11 extends into the concha cavity, in which the thickness of the sound emitting portion 11 affects the acoustic output effect of the sound emitting portion 11. The size (also referred to as thickness) of the sound generating portion 11 in the thickness direction X is proportional to the size of the front cavity of the sound generating portion 11 in the thickness direction X, and the smaller the size of the front cavity in the thickness direction X is, the larger the resonance frequency corresponding to the resonance peak of the front cavity is, and the flatter the frequency response curve in the lower frequency band range (for example, 100Hz-1000 Hz) is. In some embodiments, the sound outlet is acoustically coupled to the front cavity, and sound in the front cavity is transmitted through the sound outlet to the user's ear canal opening and received by the user's auditory system. If the size of the sounding part 11 in the thickness direction X is too large, the resonance frequency corresponding to the front cavity resonance peak corresponding to the sounding part 11 is too small, and in addition, when the wearing state is in a wearing state, the overall size or weight of the sounding part 11 is large, the wearing stability and comfort are affected, and the acoustic performance of the sounding part 11 in a lower frequency band is affected by the too large size of the sounding part 11 in the thickness direction X. When the size of the sound emitting portion 11 in the thickness direction X is too small, the space of the front and rear chambers of the sound emitting portion 11 is limited, which affects the vibration amplitude of the diaphragm and limits the low frequency output of the sound emitting portion 11. Based on this, in order to ensure that the sound emitting portion 11 can have a good acoustic output effect z and to ensure stability when worn, the thickness of the sound emitting portion 11 (the dimension in the thickness direction of the sound emitting portion 11) may be 2mm to 20mm in some embodiments. Preferably, the thickness of the sound emitting part 11 may be 5mm to 15mm. More preferably, the thickness of the sound emitting portion 11 may be set to 8mm to 12mm. In the wearing state, when at least one of the two side walls of the sound emitting portion 11 (i.e., the inner side surface facing the outside of the ear of the user and the outer side surface facing away from the outside of the ear of the user) that are disposed opposite to each other in the thickness direction X is non-planar, the thickness of the sound emitting portion 11 may refer to the maximum distance between the inner side surface and the outer side surface of the sound emitting portion 11 in the thickness direction X.
The frequency response curves corresponding to the measured different thicknesses in the embodiments of the present disclosure are measured by changing the thickness dimension of the sounding part when the wearing angle (the angle between the upper side wall or the lower side wall and the horizontal direction, for example, the angle between the upper side wall and the horizontal direction is 0 °), the wearing position is constant, and the dimension in the major axis direction and the dimension in the minor axis direction are constant.
Fig. 25A-25E are exemplary wearing schematic diagrams of headphones according to other embodiments of the present description. Referring to fig. 25A, 25D, and 25E, in some embodiments, the upper side wall 111 (also referred to as an upper side) or the lower side wall 112 (also referred to as a lower side) of the sound emitting portion 11 may be parallel or approximately parallel with respect to a horizontal plane in a wearing state. As shown in fig. 25A, in some embodiments, the projection of the distal end FE of the sound emitting portion 11 on the sagittal plane may be located in the region between the projection of the inner contour 1014 of the auricle on the sagittal plane and the projection of the edge of the concha cavity 102 on the sagittal plane, that is, the midpoint of the projection of the distal end FE of the sound emitting portion 11 on the sagittal plane is located between the projection of the inner contour 1014 of the auricle on the sagittal plane and the projection of the edge of the concha cavity 102 on the sagittal plane. As shown in fig. 25D, in some embodiments, the end FE of the sound emitting portion 11 may abut against the edge of the concha cavity 102, the fixed end of the sound emitting portion 11 may be located on the front side of the tragus, and at least a portion of the sound emitting portion 11 may cover the concha cavity 102 of the user. As shown in fig. 25E, in some embodiments, the midpoint of the projection of the end FE of the sound emitting portion 11 in the sagittal plane may be located within the projection area of the concha cavity 102 in the sagittal plane, and the projection of the fixed end of the sound emitting portion 11 in the sagittal plane may be located outside the projection area of the auricle of the user in the sagittal plane.
Referring to fig. 25B and 25C, in some embodiments, the upper side wall 111 or the lower side wall 112 of the sound emitting part 11 may be inclined at an angle with respect to the horizontal in the worn state. As shown in fig. 25B, in some embodiments, the end FE of the sound emitting portion 11 may be inclined to the area of the pinna top relative to the fixed end of the sound emitting portion 11, and the end FE of the sound emitting portion 11 may abut against the inner contour 1014 of the pinna. As shown in fig. 25C, in some embodiments, the fixed end of the sound emitting portion 11 may be inclined relative to the end FE of the sound emitting portion 11 toward the area of the top of the auricle, and the end FE of the sound emitting portion 11 may be located between the edge of the concha cavity 102 and the inner contour 1014 of the auricle, that is, the midpoint C3 of the projection of the end FE of the sound emitting portion 11 on the sagittal plane is located between the projection of the inner contour 1014 of the auricle on the sagittal plane and the projection of the edge of the concha cavity 102 on the sagittal plane.
It will be appreciated that, when the user wears the device, if the distance between the midpoint C3 of the projection of the end FE of the sound generating portion 11 on the sagittal plane and the projection of the inner contour 1014 of the auricle on the sagittal plane is too large, the end FE of the sound generating portion 11 cannot abut against the inner contour 1014 of the auricle, and thus the sound generating portion 11 cannot be limited, and is easy to fall off. In addition, when the distance between the centroid O of the first projection and a point in a certain area of the boundary of the second projection is too large, there may be a gap between the end FE of the sound generating part 11 and the inner contour 1014 of the auricle, and the sound generated from the sound generating hole and the sound generated from the pressure release hole may be shorted in the area between the end FE of the sound generating part 11 and the inner contour 1014 of the auricle, resulting in a decrease in volume of the sound at the user's ear canal opening, and the larger the area between the end FE of the sound generating part 11 and the inner contour 1014 of the auricle, the more obvious the phenomenon of the acoustic short. The inner contour 1014 of the auricle may refer to the inner wall of the auricle, and correspondingly, the outer contour 1013 of the auricle may refer to the outer wall of the auricle. In some embodiments, in order to provide better wearing stability of the earphone, the distance between the midpoint C3 of the projection of the end FE of the sound generating part 11 on the sagittal plane and the projection of the inner contour 1014 of the auricle on the sagittal plane may be no more than 8mm. Preferably, the distance between the midpoint C3 of the projection of the end FE of the sound generating part 11 on the sagittal plane and the projection of the inner contour 1014 of the auricle on the sagittal plane may be 0mm-6mm. More preferably, the mid-point C3 of the projection of the end FE of the sound emitting portion 11 on the sagittal plane may be 0mm-5.5mm from the projection of the inner contour 1014 of the auricle on the sagittal plane. In some embodiments, the distance between the midpoint C3 of the projection of the end FE of the sound generating portion 11 on the sagittal plane and the projection of the inner contour 1014 of the auricle on the sagittal plane may be 0, when the distance is equal to 0, it means that the end FE of the sound generating portion 11 abuts against the inner contour 1014 of the auricle, and the sound generating portion 11 abuts against the inner contour 1014 of the auricle in the wearing state, thereby improving the stability of the earphone when worn. In addition, the area between the end FE of the sound emitting portion 11 and the inner contour 1014 of the auricle can be made as small as possible to reduce the sound short-circuit area around the sound emitting portion 11, thereby increasing the volume of the sound of the user's ear canal opening. In a specific scenario, it may also be that, in the projection of the end FE of the sound generating portion 11 on the sagittal plane, a point other than the midpoint C3 abuts against the edge of the inner contour 1014 of the auricle, and the distance between the midpoint C3 of the projection of the end FE of the sound generating portion 11 on the sagittal plane and the projection of the inner contour 1014 of the auricle on the sagittal plane may be greater than 0mm. In some embodiments, the midpoint C3 of the projection of the end FE of the sound emitting portion 11 on the sagittal plane may be 2mm-10mm from the projection of the inner contour 1014 of the auricle on the sagittal plane. Preferably, the distance between the midpoint C3 of the projection of the end FE of the sound generating part 11 on the sagittal plane and the projection of the inner contour 1014 of the auricle on the sagittal plane may be 4mm-8mm.
In this specification, the end FE of the sounding part 11 refers to an end of the sounding part 11 away from a connection between the sounding part 11 and the ear hook, and when the projection of the end FE of the sounding part 11 on the sagittal plane is a curve or a fold line, the midpoint C3 of the projection of the end FE of the sounding part 11 on the sagittal plane may be selected by the following exemplary method, a line segment may be selected from a start point and a terminal point of the projection of the end FE on the sagittal plane, a midpoint on the line segment may be selected to be a perpendicular bisector, and a point where the perpendicular bisector intersects the projection is the midpoint C3 of the projection of the end of the sounding part 11 on the sagittal plane. In some embodiments, when the end FE of the sound generating portion 11 is curved, a tangent point where a tangent line parallel to the short axis direction Z is located on the projection thereof may be selected as a midpoint of the projection of the end FE of the sound generating portion 11 on the sagittal plane.
In addition, in some embodiments herein, the distance between the midpoint of the projection of the end FE of the sound emitting portion 11 on the sagittal plane and the projection of the inner contour 1014 of the auricle on the sagittal plane may refer to the minimum distance between the projection of the end FE of the sound emitting portion 11 on the sagittal plane and the projection area of the inner contour 1014 of the auricle on the sagittal plane. Or the distance of the midpoint C3 of the projection of the end FE of the sound emitting part 11 on the sagittal plane from the projection of the inner contour 1014 of the auricle on the sagittal plane may refer to the distance of the midpoint C3 of the projection of the end FE of the sound emitting part 11 on the sagittal plane from the projection of the inner contour 1014 of the auricle on the sagittal plane from the sagittal axis.
The length of the baffle formed by the sound emitting part 11 and the antitragus region is related to the distance range between the end FE of the sound emitting part 11 and the projection of the midpoint C3 of the projection on the sagittal plane and the projection of the inner contour 1014 of the auricle on the sagittal plane, for example, the smaller the distance between the end FE of the sound emitting part 11 and the projection of the midpoint C3 of the projection on the sagittal plane and the projection of the inner contour 1014 of the auricle on the sagittal plane, the longer the length of the baffle formed by the sound emitting part 11 and the antitragus region, the larger the sound path difference between the sound outlet hole and the pressure relief hole to the external auditory meatus 101, and the larger the sound intensity received at the external auditory meatus 101. In addition, the inclination of the projection of the upper side wall 111 or the lower side wall 112 of the sound generating part 11 with respect to the horizontal direction also affects the position of the sound emitting hole with respect to the ear canal opening, for example, the smaller the inclination of the projection of the upper side wall 111 or the lower side wall 112 of the sound generating part 11 with respect to the horizontal direction, the closer the sound emitting hole is to the ear canal opening. The following is a detailed description of fig. 25A to 25E, respectively.
In some embodiments, the shape of the sound emitting portion 11 may be a regular shape such as a cuboid, a cuboid-like (e.g., racetrack-like), a cylinder, or other irregular shape. Referring to fig. 25A, 25D, and 25E, in some embodiments, when the sound emitting portion 11 is of a cuboid-like structure, the upper side wall 111 or the lower side wall 112 of the sound emitting portion 11 may be parallel or approximately parallel with respect to the horizontal direction in the worn state. At this time, the projection of the upper side wall 111 or the lower side wall 112 of the sounding part 11 on the sagittal plane may have an inclination angle ranging from 0 ° to 20 ° with respect to the horizontal direction, and the distance between the midpoint C3 of the projection of the tip FE of the sounding part 11 on the sagittal plane and the projection of the inner contour 1014 of the auricle on the sagittal plane may range from 0mm to 18mm. Illustratively, when the wearing mode as shown in fig. 25A is adopted, the inclination angle of the projection of the upper side wall 111 or the lower side wall 112 of the sound generating portion 11 on the sagittal plane with respect to the horizontal may range from 5 ° to 15 °, and the distance between the midpoint C3 of the projection of the end FE of the sound generating portion 11 on the sagittal plane and the projection of the inner contour 1014 of the auricle on the sagittal plane may range from 0mm to 11mm; when the wearing mode as shown in fig. 25D is adopted, the inclination angle of the projection of the upper side wall 111 or the lower side wall 112 of the sound generating part 11 on the sagittal plane relative to the horizontal direction may be 7 ° -12 °, and the distance between the midpoint C3 of the projection of the end FE of the sound generating part 11 on the sagittal plane and the projection of the inner contour 1014 of the auricle on the sagittal plane may be 3mm-12mm; when the wearing mode as shown in fig. 25E is adopted, the projection of the upper side wall 111 or the lower side wall 112 of the sound generating part 11 on the sagittal plane may range from 8 ° to 10 ° with respect to the horizontal direction, and the distance between the midpoint C3 of the projection of the end FE of the sound generating part 11 on the sagittal plane and the projection of the inner contour 1014 of the auricle on the sagittal plane may range from 8mm to 12mm. In some embodiments, when the earphone is in a wearing state, the end FE of the sound emitting portion 11 may abut against the inner contour 1014 of the auricle, and meanwhile, the ear hook may be attached to the rear side of the ear of the user, so that the sound emitting portion 11 and the ear hook cooperate to clamp the ear of the user from the front side and the rear side, which increases the resistance for preventing the earphone 10 from falling off from the ear, and improves the wearing stability of the earphone 10.
With continued reference to fig. 25B and 25C, in some embodiments, the upper side wall 111 or the lower side wall 112 of the sound generating portion 11 may also be inclined at an angle with respect to the horizontal plane, but when the upper side wall 111 or the lower side wall 112 of the sound generating portion 11 is inclined at an excessive angle with respect to the horizontal plane, the sound generating portion 11 may protrude from the auricle of the user, causing problems of wearing discomfort and unstable wearing. Thus, in order to ensure that the sound emitting portion 11 covers the area of the antitragus region, so that there is a good sound intensity at the ear canal opening, while ensuring good wearing stability and comfort of the earphone, in some embodiments, the projection of the upper side wall 111 or the lower side wall 112 of the sound emitting portion 11 on the sagittal plane may have an inclination angle of not more than 43 ° from the horizontal in the wearing state of the earphone 10. In some embodiments, the projection of the upper side wall 111 or the lower side wall 112 of the sound emitting portion 11 on the sagittal plane may range from 0 ° to 43 ° with respect to the horizontal direction when worn in the wearing manner shown in fig. 25B and 25C, and the distance between the midpoint C3 of the projection of the tip FE of the sound emitting portion 11 on the sagittal plane and the projection of the inner profile 1014 of the auricle on the sagittal plane may range from 0mm to 15mm. Illustratively, when the wearing mode as shown in fig. 25B is adopted, the inclination angle of the projection of the upper side wall 111 or the lower side wall 112 of the sound generating part 11 on the sagittal plane with respect to the horizontal may range from 30 ° to 45 °, and the distance between the midpoint C3 of the projection of the end FE of the sound generating part 11 on the sagittal plane and the projection of the inner contour 1014 of the auricle on the sagittal plane may range from 0mm to 10mm; when the wearing mode as shown in fig. 25C is adopted, the projection of the upper side wall 111 or the lower side wall 112 of the sound generating part 11 on the sagittal plane may range from 25 ° to 45 ° with respect to the horizontal direction, and the distance between the midpoint C3 of the projection of the end FE of the sound generating part 11 on the sagittal plane and the projection of the inner contour 1014 of the auricle on the sagittal plane may be 3mm to 11mm.
It should be noted that the projection of the upper side wall 111 of the sound generating part 11 on the sagittal plane may have the same or different inclination from the horizontal direction as the projection of the lower side wall 112 on the sagittal plane. For example, when the upper side wall 111 and the lower side wall 112 of the sound emitting portion 11 are parallel, the projection of the upper side wall 111 on the sagittal plane is the same as the inclination of the horizontal direction and the projection of the lower side wall 112 on the sagittal plane is the same as the inclination of the horizontal direction. For another example, when the upper side wall 111 and the lower side wall 112 of the sounding portion 11 are not parallel, or one of the upper side wall 111 or the lower side wall 112 is a planar wall and the other is a non-planar wall (e.g., a curved wall), the inclination angle of the projection of the upper side wall 111 on the sagittal plane and the inclination angle of the projection of the lower side wall 112 on the sagittal plane and the horizontal direction may be different. In addition, when the upper sidewall 111 or the lower sidewall 112 is curved or concave-convex, the projection of the upper sidewall 111 or the lower sidewall 112 on the sagittal plane may be a curve or a broken line, and at this time, the angle between the projection of the upper sidewall 111 on the sagittal plane and the horizontal may be the angle between the tangent line of the point with the maximum distance between the curve or the broken line and the ground plane and the horizontal, and the angle between the projection of the lower sidewall 112 on the sagittal plane and the horizontal may be the angle between the tangent line of the point with the minimum distance between the curve or the broken line and the ground plane and the horizontal.
It should be noted that, the sounding part 11 of the earphone shown in fig. 21 may not cover the auricle area, for example, the wearing position shown in fig. 25E, where the sounding part 11 does not extend into the concha cavity, but the side wall facing the outer side of the ear of the user is suspended relative to the concha cavity of the user, that is, the sounding part 11 itself functions as a baffle, and a larger overlapping ratio of the first projection area of the sounding part 11 on the sagittal plane and the projection area of the concha cavity on the sagittal plane means that the sound outlet of the sounding part 11 is closer to the ear meatus, and the listening volume of the ear meatus of the user is larger. The projection of the tail end of the sound generating part 11 in the sagittal plane is in positive correlation with the projection distance of the edge of the concha cavity in the sagittal plane, and the overlapping proportion of the first projection area of the sound generating part 11 in the sagittal plane and the projection area of the concha cavity in the sagittal plane, and further, the position of the sound outlet of the sound generating part 11 relative to the ear canal opening is in positive correlation with the projection distance of the tail end of the sound generating part 11 in the sagittal plane and the projection distance of the edge of the concha cavity in the sagittal plane. The following is a detailed description with reference to fig. 26.
Fig. 26 shows exemplary frequency response plots corresponding to the projection of the tip of the sounding portion in the sagittal plane of fig. 25E and the projection of the edge of the concha cavity in the sagittal plane at different distances. Referring to fig. 26, wherein the abscissa indicates frequency (unit: hz), the ordinate indicates sound pressure level (unit: dB) at the ear canal orifice at different frequencies, a curve 1801 is a frequency response curve corresponding to a distance of 0 between a projection of the tip of the sounding part 11 in the sagittal plane and a projection of the concha cavity edge in the sagittal plane, a curve 1802 is a frequency response curve corresponding to a distance of 3.72mm between a projection of the tip of the sounding part 11 in the sagittal plane and a projection of the concha cavity edge in the sagittal plane, and a curve 1803 is a frequency response curve corresponding to a distance of 10.34mm between a projection of the tip of the sounding part 11 in the sagittal plane and a projection of the concha cavity edge in the sagittal plane. As can be seen from fig. 26, the frequency response when the projection of the tip of the sound generating part 11 in the sagittal plane is at a distance of 0mm and 3.72mm from the projection of the edge of the concha cavity in the sagittal plane is superior to the frequency response when 10.34mm. Based on this, in some embodiments, in order to ensure that the earphone 10 has a better listening effect, the distance between the projection of the end FE of the sound generating part 11 on the sagittal plane and the projection of the edge of the concha cavity on the sagittal plane may be no more than 10.34mm. Preferably, the projection of the end FE of the sound generating part 11 on the sagittal plane is distant from the projection of the edge of the concha cavity on the sagittal plane by 0mm-7mm. More preferably, the projection of the end FE of the sound generating portion 11 on the sagittal plane is distant from the projection of the edge of the concha cavity on the sagittal plane by 0mm-5mm. More preferably, the projection of the end FE of the sound emitting part 11 on the sagittal plane is distant from the projection of the edge of the concha cavity on the sagittal plane by 0mm-3.72mm. In a specific scenario, the point other than the midpoint C3 in the projection of the end FE of the sound generating portion 11 on the sagittal plane may abut against the edge of the concha cavity, and the distance between the midpoint C3 of the projection of the end FE of the sound generating portion 11 on the sagittal plane and the projection of the edge of the concha cavity on the sagittal plane may be greater than 0mm. In some embodiments, the midpoint C3 of the projection of the end FE of the sound emitting portion 11 on the sagittal plane may be 2mm-7mm from the projection of the edge of the concha cavity on the sagittal plane. Preferably, the distance between the midpoint C3 of the projection of the end FE of the sound generating part 11 on the sagittal plane and the projection of the edge of the concha cavity on the sagittal plane may be 2mm-3.74mm.
It should be noted that, when the projection of the end FE of the sound generating portion 11 on the sagittal plane is a curve or a broken line, the midpoint C3 of the projection of the end FE of the sound generating portion 11 on the sagittal plane may be selected by the following exemplary method, two points with the greatest distance in the short axis direction Z of the projection of the end FE on the sagittal plane may be selected as a line segment, the midpoint of the line segment is selected as a perpendicular bisector, and the point where the perpendicular bisector intersects the projection is the midpoint C3 of the projection of the end of the sound generating portion 11 on the sagittal plane. In some embodiments, when the end FE of the sound generating portion 11 is curved, a tangent point where a tangent line parallel to the short axis direction Z is located on the projection thereof may be selected as a midpoint of the projection of the end FE of the sound generating portion 11 on the sagittal plane. In addition, in some embodiments in this specification, the distance of the midpoint of the projection of the end FE of the sound emitting portion 11 on the sagittal plane from the projection of the edge of the concha cavity on the sagittal plane may refer to the minimum distance of the midpoint of the projection of the end FE of the sound emitting portion 11 on the sagittal plane from the projection area of the edge of the concha cavity on the sagittal plane. Or the distance of the midpoint C3 of the projection of the end FE of the sound generating portion 11 on the sagittal plane from the projection of the edge of the concha cavity on the sagittal plane may refer to the distance of the midpoint C3 of the projection of the end FE of the sound generating portion 11 on the sagittal plane from the projection of the edge of the concha cavity on the sagittal plane from the sagittal axis.
The frequency response curves corresponding to the different distances between the end FE of the sounding part measured in the embodiment of the present specification and the projection of the midpoint of the projection on the sagittal plane and the projection of the edge of the concha cavity on the sagittal plane are measured by changing the wearing position of the sounding part (for example, translation in the sagittal axis direction) at a certain timing with respect to the wearing angle of the sounding part (for example, the angle between the upper side wall or the lower side wall and the horizontal direction is 0 °) and the dimension in the long axis direction, the dimension in the short axis direction and the dimension in the thickness direction.
With continued reference to fig. 25A-25C, in the case where the dimensions of the sound emitting portion 11 and the auricle of the user are constant and the inclination of the sound emitting portion 11 with respect to the horizontal direction is constant in the worn state, the distance between the centroid O of the first projection of the sound emitting portion 11 in the sagittal plane and the centroid P' of the projection of the ear canal opening (for example, the dashed line region 1016 shown in fig. 25A-25E) in the sagittal plane affects the baffle effect formed by the sound emitting portion 11 and the antitragus region and the position of the sound emitting hole of the sound emitting portion 11 with respect to the ear canal opening, ultimately affecting the sound intensity at the ear canal opening. For example, the smaller the distance between the centroid O of the first projection of the sound generating portion 11 in the sagittal plane and the centroid P' of the projection of the ear canal opening in the sagittal plane, the smaller the contact area of the sound generating portion 11 with the antitragus region, the weaker the baffle effect formed by the sound generating portion 11 and the antitragus region, but the larger the overlapping ratio of the first projection area of the sound generating portion 11 in the sagittal plane and the projection area of the concha cavity in the sagittal plane at this time means that the sound outlet of the sound generating portion 11 will be closer to the ear canal opening, and the same effect of improving the listening effect at the ear canal opening can be achieved. Therefore, on the premise that the whole volume and the wearing mode of the sound generating portion 11 are constant, a distance between the centroid O of the first projection of the sound generating portion 11 in the sagittal plane and the centroid P' of the projection of the ear canal opening in the sagittal plane needs to be considered with great importance.
Fig. 27A is a schematic diagram of an exemplary frequency response curve corresponding to an area of a first projection of the sound generating portion 11 on a sagittal plane and an area of a projection of the concha cavity on a sagittal plane when the sound generating portion 11 does not extend into the concha cavity according to other embodiments of the present disclosure, and fig. 27B is a schematic diagram of an exemplary frequency response curve corresponding to a centroid of a first projection of the sound generating portion 11 on a sagittal plane and a centroid of a projection of the ear canal opening on a sagittal plane when the sound generating portion 11 does not extend into the concha cavity according to other embodiments of the present disclosure.
Referring to fig. 27A, where the abscissa is the overlapping ratio of the area of the first projection of the sound generating portion 11 on the sagittal plane and the area of the projection of the concha cavity on the sagittal plane, and the ordinate is the sound pressure level of sound at the ear canal opening corresponding to the different overlapping ratio, and the straight line 1601 represents the linear relationship of the overlapping ratio of the area of the first projection and the area of the projection of the concha cavity on the sagittal plane and the sound pressure level at the ear canal opening simulated at the frequency of 500 Hz; line 1602 represents the linear relationship of the ratio of the overlap of the area of the first projection and the area of the projection of the concha cavity on the sagittal plane to the sound pressure level at the ear canal orifice simulated at a frequency of 1 kHz; line 1603 represents the overlapping ratio of the area of the first projection to the area of the projection of the concha cavity on the sagittal plane, at a frequency of 3kHz, in a linear relationship with the sound pressure level at the ear canal orifice. The open circle points in fig. 27A represent test data corresponding to the different overlapping ratios of the area of the first projection and the area of the projection of the concha cavity on the sagittal plane at a frequency of 500 Hz; the black circle in fig. 27A represents test data corresponding to the case where the area of the first projection and the area of the projection of the concha cavity on the sagittal plane are different in overlapping ratio at a frequency of 1 kHz; the circular dots with lighter gray values in fig. 27A represent test data corresponding to the case where the area of the first projection and the area of the projection of the concha cavity on the sagittal plane overlap at different ratios at a frequency of 3 kHz. As can be seen from fig. 27A, at different frequencies, the overlapping ratio of the area of the first projection to the area of the projection of the concha cavity on the sagittal plane varies approximately linearly with the sound pressure level at the ear canal opening of the user, and when the overlapping ratio of the area of the first projection of the sound emitting portion 11 on the sagittal plane to the area of the projection of the concha cavity on the sagittal plane is greater than 10%, there is a significant increase when the sound of a specific frequency (e.g., 500Hz, 1kHz, 3 kHz) is measured at the ear canal opening with respect to the overlapping ratio (overlapping ratio is 0) of the area of the first projection of the sound emitting portion 11 on the sagittal plane to the area of the projection of the concha cavity on the sagittal plane. In addition, since the overlapping ratio of the area of the first projection of the sound generating portion 11 on the sagittal plane and the area of the projection of the concha cavity on the sagittal plane may affect the open state of the ear canal opening and thus affect the acquisition of sound in the external environment by the user, the overlapping ratio of the area of the first projection of the sound generating portion 11 on the sagittal plane and the area of the projection of the concha cavity on the sagittal plane is not preferably excessively large, for example, the overlapping ratio of the area of the first projection of the sound generating portion 11 on the sagittal plane and the area of the projection of the concha cavity on the sagittal plane is not more than 62%. Based on this, in order to ensure the acoustic output quality of the sound emitting portion 11, the overlapping ratio of the first projection of the sound emitting portion 11 on the sagittal plane and the projection of the concha cavity on the sagittal plane may be made to be between 10% and 60%. Preferably, the overlapping ratio of the first projection of the sound generating part 11 on the sagittal plane and the projection of the concha cavity on the sagittal plane may be between 10% -45%. More preferably, the ratio of overlap of the first projection of the sound emitting portion 11 on the sagittal plane and the projection of the concha cavity on the sagittal plane may be between 11.82% -40%. Preferably, the overlapping ratio of the first projection of the sound generating part 11 on the sagittal plane and the projection of the concha cavity on the sagittal plane may be between 18% -38%. More preferably, the ratio of overlap of the first projection of the sound emitting portion 11 on the sagittal plane and the projection of the concha cavity on the sagittal plane may be between 25% -38%.
Referring to fig. 27B, the abscissa is the distance between the centroid O of the first projection of the sound generating portion 11 on the sagittal plane and the centroid P' of the projection of the ear canal opening on the sagittal plane, and the ordinate is the frequency response sound pressure level of the sound at the ear canal opening corresponding to the different distances. Line 1604 represents the linear relationship between the distance of the centroid O of the first projection of the sound emitting part 11 on the sagittal plane and the centroid P' of the projection of the ear canal opening on the sagittal plane and the sound pressure level at the ear canal opening at a frequency of 500Hz in an ideal state; line 1605 represents the linear relationship between the distance of the centroid O of the first projection of the sound emitting portion 11 onto the sagittal plane and the centroid P' of the projection of the ear canal opening onto the sagittal plane and the sound pressure level at the ear canal opening at a frequency of 1 kHz; the line 1606 represents the linear relationship of the distance of the centroid O of the first projection of the sound emitting portion 11 onto the sagittal plane from the centroid P' of the projection of the ear canal opening onto the sagittal plane with the sound pressure level at the ear canal opening at a frequency of 3 kHz. The open circle point in fig. 27B represents test data corresponding to the centroid O of the first projection of the sound emitting portion 11 on the sagittal plane and the centroid P' of the projection of the ear canal opening on the sagittal plane at a frequency of 500Hz at different distances; the black circle point in fig. 27B represents test data corresponding to the case where the centroid O of the first projection of the sound emitting portion 11 on the sagittal plane and the centroid P' of the projection of the ear canal opening on the sagittal plane are at different distances at a frequency of 1 kHz; the circular point with a shallow gray value in fig. 27B represents test data corresponding to the case where the centroid O of the first projection of the sound emitting portion 11 on the sagittal plane and the centroid P' of the projection of the ear canal opening on the sagittal plane are different distances at a frequency of 3 kHz. As can be seen from fig. 27B, at different frequencies, the distance between the centroid O of the first projection of the sound emitting part 11 on the sagittal plane and the centroid P ' of the projection of the ear canal opening on the sagittal plane is approximately inversely related to the sound pressure level at the ear canal opening of the user, and as a whole, the sound pressure level of sound of a certain frequency (e.g., 500Hz, 1kHz, 3 kHz) measured at the ear canal opening has a decreasing trend with increasing distance between the centroid O of the first projection of the sound emitting part 11 on the sagittal plane and the centroid P ' of the projection of the ear canal opening on the sagittal plane, wherein in connection with fig. 27A and 27B, the larger the distance between the centroid O of the first projection of the sound emitting part 11 on the sagittal plane and the centroid P ' of the projection of the ear canal opening on the sagittal plane is, the smaller the overlapping ratio of the area of the first projection of the sound emitting part 11 on the sagittal plane and the area of the projection of the ear canal opening on the sagittal plane is. This overlapping ratio affects the relative position between the sound outlet of the sound generating portion 11 and the ear canal opening. For example, the larger the distance between the centroid O of the first projection of the sound emitting part 11 on the sagittal plane and the centroid P' of the projection of the meatus opening on the sagittal plane, the larger the overlapping ratio, and at this time, the closer the sound emitting hole of the sound emitting part 11 is to the meatus opening, the better the listening effect at the meatus opening. Furthermore, when the distance between the centroid O of the first projection of the sounding part 11 on the sagittal plane and the centroid P' of the projection of the ear canal opening on the sagittal plane is too small, the overlapping ratio of the area of the first projection of the sounding part 11 on the sagittal plane and the area of the projection of the ear canal opening on the sagittal plane is too large, the sounding part 11 may cover the ear canal opening of the user, affecting the user to acquire sound information in the external environment. As can be seen from fig. 27B, taking a frequency of 3kHz as an example, sound pressure levels at the ear canal orifice measured when the centroid O of the first projection of the sound emitting part 11 on the sagittal plane is 4mm, 5.8mm, 12mm from the centroid P 'of the projection of the ear canal orifice on the sagittal plane are-73 dB, -76dB, and-82 dB, respectively, and sound pressure levels at the ear canal orifice measured when the centroid O of the first projection of the sound emitting part 11 on the sagittal plane is 17mm, 22mm from the centroid P' of the projection of the ear canal orifice on the sagittal plane are-85 dB and-83 dB, respectively. It is understood that the distance between the centroid O of the first projection of the sound generating unit 11 on the sagittal plane and the centroid P' of the projection of the ear canal opening on the sagittal plane is not excessively large. In some embodiments, in order to provide a better acoustic output quality of the earphone in the worn state (e.g. a sound pressure level at the ear canal opening of more than-82 dB) and to ensure that the user can receive sound information in the external environment, the distance between the centroid O of the first projection of the sound emitting part 11 on the sagittal plane and the centroid P' of the projection of the ear canal opening on the sagittal plane may be 3mm-13mm. Preferably, the distance between the centroid O of the first projection of the sound generating part 11 on the sagittal plane and the centroid P' of the projection of the ear canal opening on the sagittal plane may be 4mm-10mm. Preferably, the distance between the centroid O of the first projection of the sound generating part 11 on the sagittal plane and the centroid P' of the projection of the ear canal opening on the sagittal plane may be 4mm-7mm. Preferably, the distance between the centroid O of the first projection of the sound generating part 11 on the sagittal plane and the centroid P' of the projection of the ear canal opening on the sagittal plane may be 4mm-6mm.
The frequency response curves corresponding to the different overlapping ratios measured in the embodiments of the present disclosure and the frequency response curve corresponding to the centroid of the first projection and the centroid of the projection of the ear canal opening in the sagittal plane are measured by changing the wearing position of the sounding part (for example, shifting in the sagittal axis direction) at a certain time when the wearing angle of the sounding part (the angle between the upper side wall or the lower side wall and the horizontal direction, for example, the angle between the upper side wall and the horizontal direction is 0 °), and the dimensions in the long axis direction, the short axis direction, and the thickness direction.
Referring to fig. 22, in some embodiments, the volume of listening, the leakage reduction effect, and the comfort and stability of wearing of the sound emitting portion 11 may also be improved by adjusting the distance between the centroid O of the first projection and the contour of the second projection. For example, when the sound emitting portion 11 is located at the top of the auricle, at the earlobe, in a region of the face in front of the auricle, or between the inner contour of the auricle and the edge of the concha cavity, the distance between the centroid O of the first projection and a point in a certain region of the boundary of the second projection is too small, and the distance between the centroid O of the first projection and a point in the other region is too large, the auricle region cannot cooperate with the sound emitting portion 11 to function as a baffle, and the acoustic output effect of the earphone is affected. In addition, when the distance between the centroid O of the first projection and a point in a certain area of the boundary of the second projection is too large, there may be a gap between the end FE of the sound generating part 11 and the inner contour 1014 of the auricle, and the sound generated from the sound generating hole and the sound generated from the pressure release hole may be shorted in the area between the end FE of the sound generating part 11 and the inner contour 1014 of the auricle, resulting in a decrease in volume of the sound at the user's ear canal opening, and the larger the area between the end FE of the sound generating part 11 and the inner contour 1014 of the auricle, the more obvious the phenomenon of the acoustic short. In some embodiments, when the headset 10 is worn with the sound-emitting portion 11 at least partially covering the antihelix region of the user, the centroid O of the first projection of the sound-emitting portion 11 on the sagittal plane of the user's head may also lie in the region enclosed by the outline of the second projection, but in this worn state there may be a certain difference in the distance range of the centroid O of the first projection of the sound-emitting portion 11 on the sagittal plane of the user's head from the outline of the second projection as compared to when at least part of the sound-emitting portion 11 extends into the concha cavity of the user. In the earphone shown in fig. 21, 23-25E, at least part of the sound-producing portion 11 covers the antihelix region, so that the ear canal opening is fully exposed, and the user can better receive the sound in the external environment. In some embodiments, in order to achieve the listening volume, the leakage-reducing effect, and the effect of receiving the sound of the external environment of the sound generating portion 11 and the area between the end FE of the sound generating portion 11 and the inner contour 1014 of the auricle as low as possible in this wearing manner, the sound generating portion 11 has a better acoustic output quality, and the distance between the centroid O of the first projection and the contour of the second projection may be in a range of 13mm-54 mm. Preferably, the centroid O of the first projection may be in a distance range between 18mm-50mm from the contour of the second projection. More preferably, the centroid of the first projection may also be in the range of 20mm-45mm from the contour of the second projection. In some embodiments, by controlling the distance of the centroid O of the first projection of the sound emitting portion 11 on the sagittal plane of the user's head from the contour of the second projection to be in the range of 23mm-40mm, the sound emitting portion 11 can be positioned approximately in the antitragus region of the user, and at least part of the sound emitting portion 11 can be made to form a baffle with the antitragus region to increase the sound path of sound emitted from the pressure relief hole to propagate to the external auditory canal 101, thereby increasing the sound path difference of the sound emitting hole and the pressure relief hole to the external auditory canal 101 to increase the sound intensity at the external auditory canal 101 while reducing the volume of far-field leakage sound.
In connection with fig. 22 and 27B, in the wearing state of the earphone, the distance from the centroid O of the first projection to the centroid P 'of the projection of the ear canal opening in the sagittal plane is approximately inversely related to the sound pressure level at the ear canal opening of the user, and when the distance between the centroid O of the first projection of the sound emitting part 11 in the sagittal plane and the centroid P' of the projection of the ear canal opening in the sagittal plane is too small, the overlapping ratio of the area of the first projection of the sound emitting part 11 in the sagittal plane to the area of the projection of the ear canal opening in the sagittal plane is too large, the sound emitting part 11 may cover the ear canal opening of the user, affecting the user to obtain sound information in the external environment. Considering that the position of the ear canal opening of the human ear is fixed relative to the auricle, in some embodiments the position of the sound emitting part 11 relative to the auricle and the ear canal opening when worn may also be reflected by the ratio of the distance of the centroid O of the first projection to the centroid P' of the projection of the ear canal opening in the sagittal plane to the distance of the projection of the centroid O of the first projection to the contour of the second projection in the sagittal plane. For example, the smaller the ratio, the closer the centroid O of the first projection is to the ear canal opening. In some embodiments, to ensure a listening effect at the user's ear canal opening and to keep the ear canal opening open for obtaining sound information in the external environment, the ratio of the distance P' of the centroid O of the first projection to the centroid of the projection of the ear canal opening in the sagittal plane to the distance of the projection of the centroid of the first projection to the contour of the second projection in the sagittal plane may be between 0.07-0.54. Preferably, the ratio of the distance P 'from the centroid of the first projection to the centroid of the projection of the ear canal opening in the sagittal plane to the distance from the centroid of the first projection to the projection of the contour of the second projection in the sagittal plane may be between 0.15 and 0.45, where the sound information in the external environment is obtained by adjusting the ratio range of the distance P' from the centroid of the first projection to the centroid of the projection of the ear canal opening in the sagittal plane to the distance from the centroid of the first projection to the projection of the contour of the second projection in the sagittal plane, so that the distance between the sound emitting hole of the sound emitting part and the ear canal opening is further reduced on the premise that the sound emitting part does not cover the ear canal opening as much as possible, thereby ensuring that the ear canal opening of the user has a better listening effect and keeping the ear canal opening in an open state. More preferably, the ratio of the distance P 'from the centroid of the first projection O to the centroid of the projection of the ear canal opening in the sagittal plane to the distance from the centroid of the first projection to the centroid of the projection of the contour of the second projection in the sagittal plane may be between 0.2 and 0.4, where the ratio of the distance P' from the centroid of the first projection O to the centroid of the projection of the ear canal opening in the sagittal plane to the distance from the centroid of the first projection to the projection of the contour of the second projection in the sagittal plane is adjusted to a suitable range, so as to further improve the sound effect at the ear canal opening of the user while ensuring that the ear canal opening remains open for obtaining sound information in the external environment.
In some embodiments, to avoid the problem of the first projected centroid O being too far from the projection of the first portion of the earhook 121 on the sagittal plane causing instability of wear and possibly making the area between the tip FE of the sound producing portion 11 and the inner contour 1014 of the auricle large, while avoiding the problem of the first projected centroid O being too far from the projection of the first portion of the earhook 121 on the sagittal plane causing poor wearing comfort and not being able to cooperate with the antitragus area to achieve a good acoustic output quality, the projected centroid O of the first projection of the sound producing portion 11 on the sagittal plane of the user may be controlled to have a distance in the range of 8mm-45mm from the projection of the first portion of the earhook 121 on the sagittal plane. It will be appreciated that by controlling this distance to be between 8mm and 45mm, the first portion 121 of the ear hook can be made to fit well against the rear inner side of the auricle of the user when worn, while ensuring that the sound generating portion 11 is located exactly in the antitragus region of the user, so that the sound generating portion 11 and the antitragus region form a baffle to increase the sound path of sound emitted from the pressure release hole to propagate to the external auditory canal 101, thereby increasing the sound path difference between the sound output hole and the pressure release hole to the external auditory canal 101, increasing the sound intensity at the external auditory canal 101, and reducing the volume of far-field leakage sound. In addition, the distance between the centroid O of the first projection of the sound generating part 11 on the sagittal plane of the user and the projection of the first part 121 of the ear hook on the sagittal plane is controlled to be between 8mm and 45mm, so that the area between the tail end FE of the sound generating part 11 and the inner contour 1014 of the auricle can be reduced as much as possible, and the sound short-circuit area around the sound generating part 11 is reduced, thereby improving the hearing volume of the auditory meatus of the user. Preferably, to further enhance the wearing stability of the headset, in some embodiments, the centroid O of the first projection of the sound emitting portion 11 onto the sagittal plane of the user may be in the range of 10mm-41mm from the projection of the first portion 121 of the ear hook onto the sagittal plane. More preferably, the centroid O of the first projection of the sound emitting part 11 on the sagittal plane of the user may be in the range of 13mm-37mm from the projection of the first part 121 of the ear hook on the sagittal plane. More preferably, the centroid O of the first projection of the sound emitting part 11 on the sagittal plane of the user may be in the range of 15mm-33mm from the projection of the first part 121 of the ear hook on the sagittal plane. Further preferably, the centroid O of the first projection of the sound emitting part 11 on the sagittal plane of the user may be in the range of 20mm-25mm from the projection of the first part 121 of the ear hook on the sagittal plane.
In some embodiments, the earhook may be resilient, which may deform somewhat in the worn state as compared to the unworn state. Illustratively, in some embodiments, the centroid of the first projection of the sound emitting portion 11 onto the sagittal plane of the user may be farther from the projection of the first portion 121 of the earhook onto the sagittal plane in the worn state than in the unworn state. Illustratively, in some embodiments, the centroid of the projection of the sound emitting portion 11 onto the particular reference plane may be in the range of 6mm-40mm from the projection of the first portion 121 of the earhook onto the particular reference plane when the earphone 10 is in the unworn state. Preferably, the centroid of the sound emitting portion on the specific reference plane may be in the range of 9mm-32mm from the projection of the first portion 121 of the earhook on the specific reference plane. It will be appreciated that in some embodiments, by having the centroid of the sound emitting portion 11 on the particular reference plane and the projected distance of the first portion 121 of the ear hook on the particular reference plane slightly smaller in the unworn state than in the worn state, the ear-hook and the sound emitting portion of the earphone 10 can be made to generate a certain clamping force on the user's ear when in the worn state, thereby making it possible to improve the stability of the user when wearing without affecting the user wearing experience. The content of the specific reference plane can refer to the content of other places in the specification of the present application, and is not repeated herein.
In some embodiments, when the headset 10 is worn with its sound-emitting portion 11 at least partially covering the antitragus region of the user, the centroid O of the first projection of the sound-emitting portion 11 on the sagittal plane of the user may lie outside the projected region of the user's meatus on the sagittal plane, such that the meatus remains sufficiently open to better receive sound information in the external environment. The position of the centroid O of the first projection is related to the size of the sound generating portion, and when the size of the sound generating portion 11 in the long axis direction Y or the short axis direction Z is too small, the volume of the sound generating portion 11 is relatively small, so that the area of the vibrating diaphragm arranged inside the sound generating portion is relatively small, the efficiency of the vibrating diaphragm pushing the air inside the casing of the sound generating portion 11 to generate sound is low, and the acoustic output effect of the earphone is affected. When the size of the sound generating portion 11 in the long axis direction Y is too large, the sound generating portion 11 may exceed the auricle, and the inner outline of the auricle cannot support and limit the sound generating portion 11, so that the sound generating portion 11 is easy to fall off in the wearing state. When the size of the sound emitting portion 11 in the longitudinal direction Y is too small, a gap is provided between the end FE of the sound emitting portion 11 and the inner contour 1014 of the auricle, and the sound emitted from the sound emitting hole and the sound emitted from the pressure release hole are subjected to a sound short circuit in the region between the end FE of the sound emitting portion 11 and the inner contour 1014 of the auricle, so that the volume of the sound at the auditory meatus of the user is reduced, and the sound short circuit phenomenon becomes more remarkable as the region between the end FE of the sound emitting portion 11 and the inner contour 1014 of the auricle is larger. When the size of the sound emitting portion 11 in the short axis direction Z is excessively large, the sound emitting portion 11 may cover the user's ear canal opening, affecting the user to acquire sound information in the external environment. In some embodiments, in order to provide a sound emitting portion with a good acoustic output quality, a centroid of a first projection of the sound emitting portion onto a sagittal plane of the user may be no more than 25mm from a centroid of a projection of the ear canal opening of the user onto the sagittal plane when the earphone is in a worn state. Preferably, the centroid of the first projection of the sound emitting part on the sagittal plane of the user is distant from the centroid of the projection of the ear canal opening of the user on the sagittal plane may be 5mm-23mm. More preferably, the centroid of the first projection of the sound emitting portion on the sagittal plane of the user may be 8mm-20mm from the centroid of the projection of the ear canal opening on the sagittal plane of the user. In some embodiments, by controlling the distance between the centroid of the first projection of the sound generating part on the sagittal plane of the user and the centroid of the projection of the ear canal opening of the user on the sagittal plane to be 10mm-17mm, the centroid O of the first projection can be approximately located in the antitragus region of the user, so that not only can the sound output by the sound generating part be well transmitted to the user, but also the ear canal opening can be kept in a sufficiently open state to acquire sound information in the external environment, and meanwhile, at least part of the sound generating part 11 can be subjected to acting force which prevents the sound generating part from sliding downwards, so that the wearing stability of the earphone 10 can be improved to a certain extent. It should be noted that, the shape of the projection of the ear canal opening on the sagittal plane may be regarded as an ellipse, and correspondingly, the centroid of the projection of the ear canal opening on the sagittal plane may be the geometric center of the ellipse.
In some embodiments, when the earphone 10 is worn, and at least part of the sound-generating portion 11 covers the antitragus region of the user, the distance between the centroid O of the first projection and the centroid W of the projection of the battery compartment 13 on the sagittal plane may change somewhat compared to the wearing manner in which at least part of the sound-generating portion 11 extends into the concha cavity of the user. In order to provide better stability and comfort when the earphone 10 is worn by the user, the distance (sixth distance) between the centroid O of the projection of the sound generating portion 11 in the sagittal plane and the projected centroid W of the battery compartment 13 in the sagittal plane in the wearing state may be controlled to be in the range of 20mm-31mm, in the same manner as the wearing manner in which at least part of the sound generating portion 11 extends into the concha cavity of the user, with reference to fig. 25A-25E. Preferably, the distance between the centroid O of the projection of the sound generating portion 11 on the sagittal plane and the centroid W of the projection of the battery compartment 13 on the sagittal plane may be in the range of 22mm-28mm. More preferably, the distance between the centroid O of the projection of the sound generating portion 11 on the sagittal plane and the centroid W of the projection of the battery compartment 13 on the sagittal plane may be in the range of 23mm-26mm. Since the ear hook itself has elasticity, the distance between the projected centroid O corresponding to the sound emitting portion 11 and the projected centroid W corresponding to the battery compartment 13 may vary between the worn state and the unworn state of the earphone 10. In some embodiments, the distance between the centroid O projected by the sound emitting portion 11 on the specific reference plane and the centroid W projected by the battery compartment 13 on the specific reference plane (fifth distance) may be in the range of 16.7mm to 25mm in the unworn state. Preferably, in the unworn state, the distance between the centroid O projected by the sound emitting portion 11 on the specific reference plane and the centroid W projected by the battery compartment 13 on the specific reference plane may be in the range of 18mm to 23mm. More preferably, in the unworn state, the distance between the centroid O of the projection of the sound generating portion 11 on the specific reference plane and the centroid W of the projection of the battery compartment 13 on the specific sagittal plane may be in the range of 19.6mm to 21.8mm.
Taking a specific reference plane as a sagittal plane as an example, in some embodiments, the change value of the distance between the centroid O of the projection corresponding to the sound generating part 11 and the centroid W of the projection corresponding to the battery compartment 13 (the ratio of the difference between the fourth distance and the third distance to the third distance) may reflect the softness of the ear hook in the worn state and in the unworn state of the earphone 10. It can be understood that when the softness of the ear hook is too high, the overall structure and the shape of the earphone 10 are unstable, the sounding part 11 and the battery compartment 13 cannot be strongly supported, the wearing stability is poor, and the earphone is easy to fall off. Considering that the ear hook needs to be hung at the junction of the auricle and the head, when the softness of the ear hook is too small, the earphone 10 is not easy to deform, and when the earphone is worn by a user, the ear hook can be tightly attached to or even pressed on the area between the ears and/or the head of the human body, so that wearing comfort is affected. Based on this, in order to provide better stability and comfort when the user wears the earphone 10, in some embodiments, a ratio of a distance change value of the centroid O of the first projection of the earphone 10 in the worn state and the non-worn state from the centroid W of the projection of the battery compartment 13 in the sagittal plane to a distance of the centroid O of the first projection of the earphone in the non-worn state from the centroid W of the projection of the battery compartment 13 in the sagittal plane may be in a range of 0.3-0.7. Preferably, the ratio of the value of the change in the distance between the centroid O of the projection of the sound emitting portion 11 on the sagittal plane and the centroid W of the projection of the battery compartment 13 on the sagittal plane of the earphone 10 in the worn state and the unworn state to the distance between the centroid O of the sound emitting portion 11 and the centroid W of the battery compartment 13 of the earphone in the unworn state may be in the range of 0.45-0.68. The content regarding a specific reference plane may refer to the content elsewhere in this specification, for example, fig. 16A and 16B and their corresponding content.
In addition, the size of the baffle plate (especially, the size along the long axis direction Y of the first projection) formed by the sound emitting part 11 and the antihelix region needs to be considered as large as possible while the auditory canal is not blocked, and the whole volume of the sound emitting part 11 is not too large nor too small, so that the wearing angle of the sound emitting part 11 relative to the antihelix region needs to be considered on the premise that the whole volume or shape of the sound emitting part 11 is specific.
The whole or part of the structure of the sound generating part 11 covers the anthelix region to form a baffle, and the sound receiving effect of the user wearing the earphone 10 is related to the distance between the sound generating hole and the pressure release hole of the sound generating part 11, and the closer the distance between the sound generating hole and the pressure release hole is, the more sounds generated by the sound generating hole and the pressure release hole are counteracted at the auditory meatus of the user, and the lower the volume of sound receiving at the auditory meatus of the user is. The spacing between the sound emitting holes and the pressure release holes is related to the size of the sound emitting portion 11, for example, the sound emitting holes may be disposed on a side wall (e.g., a lower side wall or an inner side surface) of the sound emitting portion 11 near the user's ear canal opening, and the pressure release holes may be disposed on a side wall (e.g., an upper side wall or an outer side surface) of the sound emitting portion 11 far from the user's ear canal opening. Therefore, the size of the sound emitting portion may affect the volume of the sound at the level of the user's ear canal, for example, when the size is too large, a sense of pressure may be given to most areas of the ear, which affects the wearing comfort of the user and the convenience when the user carries about. The ratio of the distance from the midpoint of the projection of the upper and lower side walls 111, 112 of the sound emitting portion 11 on the sagittal plane to the highest point of the second projection to the distance from the centroid O of the first projection to the highest point of the second projection may reflect the size of the sound emitting portion 11 in the short axis direction Z and the position of the sound emitting portion 11 with respect to the ear canal opening. For example, when the dimension of the sounding part 11 in the short axis direction Z is fixed, the farther the sounding part 11 is from the highest point of the auricle, the greater the ratio of the distance from the midpoint of the projection of the upper side wall 111 of the sounding part 11 on the sagittal plane to the highest point of the second projection to the distance from the centroid O of the first projection to the highest point of the second projection, the smaller the ratio of the distance from the midpoint of the projection of the lower side wall 112 of the sounding part 11 on the sagittal plane to the highest point of the second projection to the distance from the centroid O of the first projection to the highest point of the second projection; similarly, when the distance from the centroid O of the first projection formed by the sounding part 11 to the highest point of the second projection formed by the auricle is fixed, the larger the dimension of the sounding part 11 in the short axis direction Z is, the smaller the ratio of the distance from the midpoint of the projection of the upper side wall 111 of the sounding part on the sagittal plane to the highest point of the second projection to the distance from the centroid O of the first projection to the highest point of the second projection is, and the larger the ratio of the distance from the midpoint of the projection of the lower side wall 112 of the sounding part 11 on the sagittal plane to the highest point of the second projection to the distance from the centroid O of the first projection to the highest point of the second projection is. To ensure that the earphone 10 does not occlude the user's ear canal opening while improving the listening effect of the earphone 10, in some embodiments, the ratio of the distance from the midpoint of the projection of the upper side wall of the sound emitting portion on the sagittal plane to the highest point of the second projection to the distance from the centroid of the first projection to the highest point of the second projection may be in the range of 0.65-0.85, or the ratio of the distance from the midpoint of the projection of the lower side wall 112 of the sound emitting portion 11 on the sagittal plane to the highest point of the second projection to the distance from the centroid of the first projection to the highest point of the second projection may be in the range of 1.17-1.4. Preferably, the ratio of the distance from the midpoint of the projection of the upper side wall 111 of the sound generating part to the highest point of the second projection on the sagittal plane to the distance from the centroid O of the first projection to the highest point of the second projection may be in the range of 0.7-0.8, or the ratio of the distance from the midpoint of the projection of the lower side wall 112 of the sound generating part 11 to the highest point of the second projection to the distance from the centroid O of the first projection to the highest point A1 of the second projection may be in the range of 1.2-1.3, where the sound channel opening is further ensured by adjusting the ratio of the distance from the midpoint C1 of the upper side wall 111 of the sound generating part to the highest point A1 of the second projection to the distance from the centroid O of the first projection to the highest point A1 of the second projection or the distance from the midpoint C2 of the lower side wall 112 of the sound generating part 11 to the highest point A1 of the second projection to the highest point A1 of the first projection to the sound opening of the sound channel to ensure that the sound channel opening is not covered by the auditory meatus in the auditory meatus and the user's opening is further ensured.
In some embodiments, the distance of the midpoint of the projection of the upper side wall 111 of the sound generating portion 11 on the sagittal plane from the highest point of the second projection on the sagittal plane may also be reflected by the distance of the midpoint of the projection of the upper side wall 111 of the sound generating portion 11 on the sagittal plane from the highest point of the second projection on the sagittal plane in order to enhance the listening effect of the earphone 10 while ensuring that the earphone 10 does not block the user's ear canal opening based on this, in some embodiments, the distance of the midpoint of the projection of the upper side wall 111 of the sound generating portion 11 on the sagittal plane from the highest point of the second projection may be in the range of 12mm-24mm when the earphone 10 is worn in a state in which at least part of the sound generating portion 11 covers the user's antitragus region, preferably, the distance between the midpoint of the projection of the upper side wall 111 of the sounding part 11 on the sagittal plane and the highest point of the second projection is in the range of 12.5mm-23mm, and the distance between the midpoint of the projection of the lower side wall 112 of the sounding part 11 on the sagittal plane and the highest point of the second projection is in the range of 22.5mm-33mm. The point of the projection of the upper side wall 111 on the sagittal plane at which the distance from the projection of the highest point of the second projection is smallest may be selected as the midpoint of the projection of the upper side wall 111 of the sound generating portion 11 on the sagittal plane. The midpoint of the projection of the lower side wall 112 of the sound generating portion 11 on the sagittal plane is selected in the same manner as described above, and for example, a point at which the distance from the projection of the highest point of the second projection in the projection of the lower side wall 112 on the sagittal plane is largest may be selected as the midpoint of the projection of the lower side wall 112 of the sound generating portion 11 on the sagittal plane.
In some embodiments, the dimension of the sound emitting portion 11 in the short axis direction Z may also be reflected by the distance of the projection of the mid-point of the upper and lower side walls 111, 112 of the sound emitting portion 11 on the sagittal plane from the projection of the supra-aural vertex on the sagittal plane. To ensure that the earphone 10 does not block the user's ear canal opening while improving the listening effect of the earphone 10, in some embodiments, the distance between the midpoint of the projection of the upper side wall 111 of the sound emitting portion 11 on the sagittal plane and the projection of the upper peak of the ear hook on the sagittal plane may be in the range of 13mm-20mm, and the distance between the midpoint of the projection of the lower side wall 112 of the sound emitting portion 11 on the sagittal plane and the projection of the upper peak of the ear hook on the sagittal plane may be in the range of 22mm-36mm. Preferably, the distance between the midpoint of the projection of the upper side wall 111 of the sound generating part 11 on the sagittal plane and the projection of the upper peak of the ear hook on the sagittal plane may be in the range of 14mm-19.5mm, and the distance between the midpoint of the projection of the lower side wall 112 of the sound generating part 11 on the sagittal plane and the projection of the upper peak of the ear hook on the sagittal plane may be in the range of 22.5mm-35mm. More preferably, the distance between the midpoint of the projection of the upper side wall 111 of the sound generating part 11 on the sagittal plane and the projection of the upper peak of the ear hook on the sagittal plane may be in the range of 15mm-18mm, and the distance between the midpoint of the projection of the lower side wall 112 of the sound generating part 11 on the sagittal plane and the projection of the upper peak of the ear hook on the sagittal plane may be in the range of 26mm-30mm.
In some embodiments, the distance of the centroid O of the first projection from the projection of the supra-aural vertex in the sagittal plane may also reflect the dimension of the sound emitting portion 11 in the short axis direction Z. To enhance the listening effect of the earphone 10 while ensuring that the earphone 10 does not block the user's ear canal opening, in some embodiments the centroid O of the first projection may be 14mm-28mm from the projection of the upper apex of the earhook in the sagittal plane. Preferably, the distance between the centroid O of the first projection and the projection of the top point of the ear hook on the sagittal plane may be 18mm-24mm, where by adjusting the distance between the centroid O of the first projection and the projection of the top point T1 of the ear hook on the sagittal plane, the distance between the sound emitting hole of the sound emitting part and the ear canal opening can be further reduced on the premise that the sound emitting part does not cover the ear canal opening as much as possible, so as to ensure that the ear canal opening of the user has a better listening effect and keep the ear canal opening in an open state to obtain sound information in the external environment. Because the ear hook is of an elastic structure, the distance between the centroid O of the first projection and the projection of the upper peak of the ear hook on the sagittal plane in the unworn state is slightly smaller than the distance between the centroid O of the first projection and the projection of the upper peak of the ear hook on the sagittal plane in the unworn state. In some embodiments, the centroid O of the first projection may be from 12mm to 26mm from the projection of the apex on the supra-aural vertex in the sagittal plane in the unworn state. Preferably, in the unworn state, the centroid O of the first projection may be from 14mm to 24mm from the projection of the supra-aural vertex T1 in the sagittal plane. More preferably, in the unworn state, the centroid O of the first projection may be 16mm-22mm from the projection of the supra-aural vertex T1 in the sagittal plane. Regarding the technical effect of the distance of the centroid O of the first projection from the projection of the supra-aural vertex T1 in the sagittal plane in the unworn state, reference may be made to the relevant description in the worn state. It should be noted that, in the unworn state, the distance between the centroid O of the first projection and the projection of the apex T1 of the ear hook on the sagittal plane may be measured by removing the auricle structure in the human head model mentioned in the present specification, and fixing the sound emitting part on the human head model in the same posture as in the wearing state by using a fixing member or glue.
In some embodiments, in order that a portion or the whole structure of the sound emitting part may cover the antitragus region when the user wears the earphone as shown in fig. 21, the upper side wall 111 of the sound emitting part 11 has a certain angle with the second part 122 of the ear hook. Similar to the principle that at least part of the sound emitting part extends into the concha cavity, with continued reference to fig. 19A, this angle may be represented by an angle β which may be the tangent 126 of the projection of the upper side wall 111 of the sound emitting part 11 in the sagittal plane and the projection of the connection of the second part 122 of the ear hook with the upper side wall 111 of the sound emitting part 11 in the sagittal plane. Specifically, the upper side wall of the sound generating part 11 and the second part 122 of the ear hook have a connection, and the projection of the connection in the sagittal plane is a point U, and a tangent 126 of the projection of the second part 122 of the ear hook in the sagittal plane is made passing through the point U. When the upper sidewall 111 is curved, the projection of the upper sidewall 111 on the sagittal plane may be a curve or a broken line, and the angle between the projection of the upper sidewall 111 on the sagittal plane and the tangent line 126 may be the angle between the tangent line and the tangent line 126 at the point where the distance between the curve or the broken line and the ground plane is the greatest. In some embodiments, when the upper sidewall 111 is curved, a tangent line parallel to the long axis Y on its projection may be selected, and the angle between the tangent line and the horizontal represents the inclination angle between the projection of the upper sidewall 111 on the sagittal plane and the tangent line 126. In some embodiments, the included angle β may be in the range of 45 ° -110 °. Preferably, the angle β may be in the range of 60 ° -100 °. More preferably, the angle β may be in the range of 80 ° -95 °.
The human head may be regarded as approximately a sphere-like structure, the pinna being a structure protruding outwards from the head, and the user's part of the area of the ear hook being placed against the user's head when wearing the headset, in order to enable the sound-emitting part 11 to be in contact with the area of the antitragus, in some embodiments the sound-emitting part may have a certain inclination angle with respect to the plane of the ear hook when the headset is in the wearing state. The inclination angle can be expressed by the angle between the plane corresponding to the sound emitting portion 11 and the plane of the ear hook. In some embodiments, the corresponding plane 11 of the sound emitting portion 11 may include a lateral side and a medial side. In some embodiments, when the outer side or the inner side of the sound generating portion 11 is a curved surface, the plane corresponding to the sound generating portion 11 may refer to a tangent plane corresponding to the curved surface at the center position, or a plane approximately coinciding with a curve enclosed by the edge contour of the curved surface. Taking the inner side surface of the sound emitting part 11 as an example, the included angle formed between the side surface and the plane of the ear hook is the inclination angle of the sound emitting part 11 relative to the plane of the ear hook.
Considering that an excessively large angle may make the contact area of the sound emitting portion 11 with the antitragus region of the user smaller, sufficient contact resistance cannot be provided, and the user easily falls off when wearing the device, in addition, the size of the baffle plate formed by the sound emitting portion 11 at least partially covering the antitragus region (especially, the size along the long axis direction Y of the sound emitting portion 11) is too small, and the sound path difference from the sound emitting hole and the pressure relief hole to the external auditory meatus 101 is small, so that the sound volume of the ear meatus of the user is affected. Further, the size of the sounding part 11 in the longitudinal direction Y is too small, and the area between the end FE of the sounding part 11 and the inner contour 1014 of the auricle is large, so that the sound from the sounding hole and the sound from the pressure release hole are short-circuited in the area between the end FE of the sounding part 11 and the inner contour 1014 of the auricle, resulting in a reduction in the volume of the sound at the level of the auditory meatus of the user. In order to ensure that the user can have a better listening effect when wearing the earphone 10 and ensure stability and comfort when wearing, for example, in some embodiments, when the earphone is worn in such a way that the sound-producing portion 11 at least partially covers the auricle area of the user, and the earphone is in a wearing state, the inclination angle range of the plane corresponding to the sound-producing portion 11 relative to the plane of the ear hook may be no greater than 8 °, so that the sound-producing portion 11 has a larger contact area with the auricle area of the user, stability when wearing is improved, and meanwhile, most of the structure of the sound-producing portion 11 is located in the auricle area, so that the auricle opening is in a completely released state, so that the user receives sound in the external environment. Preferably, the inclination angle of the plane corresponding to the sound emitting part 11 with respect to the plane of the ear hook may be in the range of 2 ° -7 °. Preferably, the inclination angle of the plane corresponding to the sound emitting part 11 with respect to the plane of the ear hook may be in the range of 3-6 °.
Because the ear hook has elasticity, the inclination angle of the sound generating part relative to the plane of the ear hook can be changed to a certain extent in a wearing state and an unworn state, for example, the inclination angle in the unworn state is smaller than that in the wearing state. In some embodiments, the sound emitting portion may be inclined at an angle ranging from 0 ° to 6 ° relative to the plane of the ear hook when the headset is in the unworn state. By making the inclination of the sound generating portion relative to the plane of the ear hook slightly smaller than the wearing state in the unworn state, the ear hook of the earphone 10 can generate a certain clamping force to the ear (such as the antitragus region) of the user when the earphone is in the wearing state, so that the stability of the earphone when the earphone is worn by the user is improved under the condition that the wearing experience of the user is not affected. Preferably, in the unworn state, the sound emitting portion may have an inclination angle in the range of 1 ° to 6 ° with respect to the plane of the ear hook. Preferably, in the unworn state, the sound emitting portion may have an inclination angle in the range of 2 ° to 5 ° with respect to the plane of the ear hook.
When the size of the sound emitting portion 11 in the thickness direction X is too small, the volumes of the front and rear chambers formed by the diaphragm and the housing of the sound emitting portion 11 are too small, the vibration amplitude of the vibration is limited, and a large sound volume cannot be provided. When the size of the sound emitting portion 11 in the thickness direction X is excessively large, the overall size or weight of the sound emitting portion 11 is large in the wearing state, affecting the wearing stability and comfort. In some embodiments, in order to ensure that the sound generating portion 11 may have a better acoustic output effect and ensure stability when worn, in some embodiments, when the wearing mode of the earphone is that the sound generating portion at least partially covers an antitragus area of a user, and the earphone is in a wearing state, a distance between a point on the sound generating portion farthest from an ear hanging plane and the ear hanging plane may be 12mm-19mm, and a distance between a point on the sound generating portion closest to the ear hanging plane and the ear hanging plane may be 3mm-9mm. Preferably, when the earphone is in a wearing state, the distance between the furthest point of the sound generating part and the plane of the ear hook can be 13.5mm-17mm, and the distance between the closest point of the sound generating part and the plane of the ear hook can be 4.5mm-8mm. Preferably, when the earphone is in a wearing state, the distance between the furthest point of the sound generating part and the plane of the ear hook can be 14mm-17mm, and the distance between the closest point of the sound generating part and the plane of the ear hook can be 5mm-7mm. In some embodiments, by controlling the distance between the point on the sound generating part furthest from the ear-hook plane and the ear-hook plane to be between 12mm and 19mm, and simultaneously controlling the distance between the point on the sound generating part closest to the ear-hook plane and the ear-hook plane to be between 3mm and 9mm, the dimension Y of the sound generating part in the thickness direction X and the long axis direction can be restrained so that at least part of the dimension Y can be matched with the antitragus region of a user to form a baffle, and meanwhile, the earphone has better wearing comfort and stability. Regarding the earphone shown in fig. 22 and 23, which is substantially the same as the overall structure of the earphone shown in fig. 19A and 19B, reference may be made to fig. 19A and 19B regarding the inclination angle of the sound emitting portion with respect to the ear-hook plane and the distance of the point of the sound emitting portion 11 farthest from the ear-hook plane in the earphone shown in fig. 22 and 23.
In some embodiments, when the earphone 10 is worn in such a manner that the sound emitting portion at least partially covers the auricle area of the user and the earphone is in a wearing state, at least part of the sound emitting portion 11 may be subjected to the force of the auricle to prevent the sound emitting portion from sliding down, so that the wearing stability of the earphone is improved by the force of the auricle area on the sound emitting portion 11 while the acoustic output effect of the sound emitting portion 11 is ensured, and at this time, the sound emitting portion 11 may have a certain inclination angle with respect to the auricle surface of the user. When the range of the inclination angle of the sound emitting portion 11 with respect to the auricle face is large, the sound emitting portion 11 presses the antihelix region, and the user may feel a strong uncomfortable feeling when wearing the ear for a long time. Therefore, in order to make the earphone have better stability and comfort when the user wears the earphone and make the sound emitting part 11 have better acoustic output effect, the inclination angle range of the sound emitting part of the earphone relative to the auricle surface can be between 5 degrees and 40 degrees in the wearing state. Preferably, in some embodiments, in order to further optimize the acoustic output quality and wearing experience of the earphone in the wearing state, the inclination angle range of the sound generating part relative to the auricle surface can be controlled between 8 ° -35 °. Preferably, the inclination angle of the sound emitting part relative to the auricle face is controlled to be 15-25 degrees. It should be noted that, the inclination angle of the side wall of the sound generating part 11 facing away from the user's head or facing toward the user's ear canal opening with respect to the auricle surface of the user may be the sum of the included angle γ1 between the auricle surface and the sagittal plane, and the included angle γ2 between the side wall of the sound generating part 11 facing away from the user's head or facing toward the user's ear canal opening and the sagittal plane. Reference may be made to what is elsewhere in the embodiments of the present specification regarding the angle of inclination of the sound-emitting portion with respect to the auricle face, for example, fig. 15 and its associated description.
While the basic concepts have been described above, it will be apparent to those skilled in the art that the foregoing detailed disclosure is by way of example only and is not intended to be limiting. Although not explicitly described herein, various modifications, improvements and adaptations of the application may occur to one skilled in the art. Such modifications, improvements, and modifications are intended to be suggested within the present disclosure, and therefore, such modifications, improvements, and adaptations are intended to be within the spirit and scope of the exemplary embodiments of the present disclosure.
Meanwhile, the present application uses specific words to describe embodiments of the present application. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic is associated with at least one embodiment of the application. Thus, it should be emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various positions in this specification are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the application may be combined as suitable.
Similarly, it should be noted that in order to simplify the description of the present disclosure and thereby aid in understanding one or more inventive embodiments, various features are sometimes grouped together in a single embodiment, figure, or description thereof. This method of disclosure does not imply that the subject application requires more features than are set forth in the claims. Indeed, less than all of the features of a single embodiment disclosed above.
Finally, it should be understood that the embodiments described herein are merely illustrative of the principles of the embodiments of the present application. Other variations are also possible within the scope of the application. Thus, by way of example, and not limitation, alternative configurations of embodiments of the application may be considered in keeping with the teachings of the application. Accordingly, the embodiments of the present application are not limited to the embodiments explicitly described and depicted herein. The detailed description of the application is merely exemplary, and one or more of the features of the detailed description are optional or additional and do not constitute essential features of the inventive concepts. In other words, the scope of the application encompasses and is much greater than the specific embodiments.
Claims (15)
1. An earphone, comprising:
A sound generating part; and
The ear hook comprises a first part and a second part which are sequentially connected, wherein the first part is hung between the auricle and the head of a user, the second part extends to the front outer side surface of the auricle and is connected with the sound generating part, the sound generating part is worn near the auditory meatus but does not block the auditory meatus, and the sound generating part and the auricle respectively have a first projection and a second projection on the sagittal plane;
The centroid of the first projection and the highest point of the second projection have a first distance in the vertical axis direction, the first distance is in the range of 17mm-43mm, and the area range of the first projection is 202mm 2-560mm2.
2. The earphone of claim 1, wherein at least part of the sound emitting portion protrudes into the concha cavity, the centroid of the first projection and the terminal point of the second projection having a second distance in the sagittal axis direction, wherein the first distance is in the range of 25mm-43mm and/or the second distance is in the range of 20mm-32.8 mm.
3. The earphone of claim 2, wherein a ratio of an overlapping portion of the area of the first projection and the projected area of the concha cavity on the sagittal plane to the projected area of the concha cavity on the sagittal plane is not less than 44.01%.
4. The earphone of claim 2, wherein a projection of a distal end of the sound emitting portion at the sagittal plane is no more than 16mm from a projection of an edge of the concha cavity at the sagittal plane.
5. The headset of claim 2, wherein the shape of the first projection includes a major axis direction and a minor axis direction, the shape of the first projection satisfying at least one of the following conditions:
The size range of the shape of the first projection along the long axis direction is 18mm-29mm;
The shape of the first projection has a dimension in the short axis direction in the range of 10mm to 15mm.
6. The earphone of claim 2, wherein a ratio of a distance from a midpoint of a projection of an upper side wall of the sound generating portion on the sagittal plane to a highest point of the second projection to a distance from a centroid of the first projection to a highest point of the second projection is 0.75-0.9, and/or a ratio of a distance from a midpoint of a projection of a lower side wall of the sound generating portion on the sagittal plane to a highest point of the second projection to a distance from a centroid of the first projection to a highest point of the second projection is 1.1-1.35.
7. The earphone of claim 2, wherein a distance between a midpoint of projection of the upper sidewall of the sound generating portion onto the sagittal plane and a projection of an on-ear vertex onto the sagittal plane is in a range of 21mm-32mm; and/or the distance between the midpoint of the projection of the lower side wall of the sound generating part on the sagittal plane and the projection of the top point of the ear hook on the sagittal plane is 32mm-48mm.
8. The earphone according to any of claims 2-7, wherein the ratio of the first distance to the height of the second projection in the vertical axis direction is between 0.35-0.6 and/or the ratio of the second distance to the width of the second projection in the sagittal axis direction is between 0.4-0.65.
9. The earpiece of claim 2, wherein a ratio of a distance of a centroid of the first projection to a centroid of a projection of the ear canal orifice on the sagittal plane to a distance of a projection of a centroid of the first projection to a contour of the second projection on the sagittal plane is between 0.13-0.55.
10. The earphone of claim 2, wherein the projection of the upper or lower sidewall of the sound generating portion onto the sagittal plane is inclined at an angle ranging from 13 ° to 21 ° with respect to the horizontal.
11. The earphone of claim 1, wherein at least part of the sound emitting portion covers an antihelix region, the centroid of the first projection and the end point of the second projection having a second distance in the sagittal axis direction, wherein the first distance is in the range of 17mm-29mm and/or the second distance is in the range of 20mm-31 mm.
12. The headset of claim 11, wherein a ratio of an overlapping portion of an area of the first projection and an area of projection of the concha cavity on the sagittal plane to an area of projection of the concha cavity on the sagittal plane is not less than 11.82%.
13. The earphone of claim 11, wherein a ratio of a distance from a midpoint of a projection of an upper side wall of the sound generating portion on the sagittal plane to a highest point of the second projection to a distance from a centroid of the first projection to a highest point of the second projection is 0.65-0.85, and/or a ratio of a distance from a midpoint of a projection of a lower side wall of the sound generating portion on the sagittal plane to a highest point of the second projection to a distance from a centroid of the first projection to a highest point of the second projection is 1.17-1.4.
14. The earpiece of claim 11, wherein a ratio of a distance of a centroid of the first projection to a centroid of a projection of the ear canal orifice on the sagittal plane to a distance of a projection of a centroid of the first projection to a contour of the second projection on the sagittal plane is between 0.07-0.54.
15. The earphone of claim 11, wherein a projection of the upper or lower sidewall of the sound emitting portion onto the sagittal plane has an inclination angle ranging from 40 ° or less with respect to a horizontal direction.
Applications Claiming Priority (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211336918 | 2022-10-28 | ||
| CN2022113369184 | 2022-10-28 | ||
| CN2022232396286 | 2022-12-01 | ||
| CN202223239628 | 2022-12-01 | ||
| IBPCT/CN2022/144339 | 2022-12-30 | ||
| PCT/CN2023/079409 WO2024087442A1 (en) | 2022-10-28 | 2023-03-02 | Open earbud |
| IBPCT/CN2023/079409 | 2023-03-02 | ||
| IBPCT/CN2023/079412 | 2023-03-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117956358A true CN117956358A (en) | 2024-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310327033.6A Pending CN117956349A (en) | 2022-10-28 | 2023-03-24 | Earphone |
| CN202310332886.9A Pending CN117956358A (en) | 2022-10-28 | 2023-03-24 | Earphone |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310327033.6A Pending CN117956349A (en) | 2022-10-28 | 2023-03-24 | Earphone |
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| Country | Link |
|---|---|
| CN (2) | CN117956349A (en) |
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2023
- 2023-03-24 CN CN202310327033.6A patent/CN117956349A/en active Pending
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| CN117956349A (en) | 2024-04-30 |
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