CN117956349A - Earphone - Google Patents

Abstract

One or more embodiments of the present specification relate to an earphone including: a sound generating part including a transducer and a housing accommodating the transducer; the ear hook is characterized in that a first part of the ear hook is hung between the auricle and the head of a user in a wearing state, a second part of the ear hook is connected with the first part, extends to one side of the auricle away from the head and is connected with a sound generating part, and the sound generating part is worn near the auditory canal but does not block the auditory canal opening; the inner contour of the projection of the ear hook on the sagittal plane of the user comprises a first curve, wherein the first curve has extreme points in a first direction, and the first direction is perpendicular to the long axis direction of the projection of the sounding part on the sagittal plane of the user; the extreme point is positioned at the rear side of a projection point of the upper vertex of the ear hook on the sagittal plane of the user, and the upper vertex is the highest point of the inner outline of the ear hook along the vertical axis of the user in the wearing state; the angle of inclination of the long axis direction of projection of the sound generating part on the sagittal plane of the user with respect to the horizontal direction is in the range of 13 ° -21 °.

Description

Earphone

Cross reference

The present application claims priority from China application number 202211336918.4 filed on 10/28/2022, china application number 202223239628.6 filed on 12/01/2022, international application number PCT/CN2022/144339 filed on 30/2022, and International application number PCT/CN2023/079409 filed on 02/2023/03, which are all incorporated herein by reference.

Technical Field

The present disclosure relates to the field of acoustic devices, and 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. Headphones can be generally categorized into head-wear, ear-hanging, in-ear, etc., according to the manner in which the user wears them. In the wearing process of the earphone, the wearing position of the sounding part of the earphone relative to the ear of the user can influence the wearing comfort and stability of the earphone, and can also influence the acoustic output performance of the earphone.

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

An embodiment of the present specification provides an earphone, including: a sound generating part including a transducer and a housing accommodating the transducer; the ear hook comprises an ear hook body, wherein a first part of the ear hook body is hung between an auricle and a head of a user in a wearing state, a second part of the ear hook body is connected with the first part and extends to one side of the auricle, which is away from the head, and is connected with the sound generating part, and the sound generating part is worn near an auditory canal but not blocking the auditory canal opening; wherein the inner contour of the projection of the ear hook on the sagittal plane of the user comprises a first curve having an extreme point in a first direction perpendicular to the long axis direction of the projection of the sound generating part on the sagittal plane of the user; the extreme point is positioned at the rear side of a projection point of an upper vertex of the ear hook on a sagittal plane of the user, and the upper vertex is the highest point of the inner outline of the ear hook along a vertical axis of the user in a wearing state; the inclination angle of the projection of the sound generating part on the sagittal plane of the user relative to the horizontal direction is in the range of 13-21 degrees. Through the arrangement, the sound generating part can be worn at the proper position of the ear of the user, so that the sound generating part and the concha cavity of the user form a proper cavity-like structure, and the output performance of the earphone is improved; meanwhile, interference between the sound generating part and the ears of the user is reduced, and wearing stability and comfort of the earphone are improved.

In some embodiments, in the direction of the long axis of the projection of the sounding part, the distance between the extreme point and the projection point of the upper vertex on the sagittal plane of the user is 6mm-15mm, so that the whole or part of the sounding part extends into the concha cavity, the area of the sounding part covering the concha cavity is increased, the size of a gap formed between the sounding part and the edge of the concha cavity is reduced, and the volume of the sound of the ear canal opening is increased.

In some embodiments, the distance between the extreme point and the projection point of the centroid of the sounding part on the sagittal plane of the user is 20mm-30mm, so that the sounding part is located at a proper position in a wearing state, a better cavity-like structure formed by the sounding part and the concha cavity is formed, the output performance of the earphone is improved, the interference between the sounding part and the ear of the user is reduced, and the wearing stability and comfort of the earphone are improved.

In some embodiments, the included angle between the line between the extreme point and the projection point of the centroid of the sounding part on the sagittal plane of the user and the long axis direction of the sounding part projection is 65 ° -85 °, so that the sounding part is in a proper position after extending into the concha cavity, the sounding part and the concha cavity can form a better cavity-like structure, and the output performance of the earphone is improved.

In some embodiments, a distance between a projection point of the upper vertex on the sagittal plane of the user and a projection point of the centroid of the sounding part on the sagittal plane of the user is 20mm-30mm, so that the sounding part is positioned at a proper position in a wearing state, the sounding part and the concha cavity can form a better cavity-like structure, and the output performance of the earphone is improved.

In some embodiments, an included angle between a projection point of the upper vertex on the sagittal plane of the user and a projection point of the centroid of the sounding part on the sagittal plane of the user and a long axis direction projected by the sounding part is between 45 ° and 65 °, so that the sounding part is positioned at a proper position in a wearing state, a better fit is provided between a free end of the sounding part and the concha cavity, and wearing stability and comfort of the earphone are improved.

In some embodiments, the sound emitting portion extends at least partially into the concha cavity, the center of mass of the sound emitting portion having a first distance in a vertical axis direction between a point of projection of the centroid of the sound emitting portion on the sagittal plane of the user and a point of projection of the highest point of the auricle on the sagittal plane of the user, the ratio of the first distance to the height of projection of the auricle on the sagittal plane of the user in the vertical axis direction being between 0.35-0.6; the center of mass of the sound generating part has a second distance in the sagittal axis direction between a projection point of the user on the sagittal plane and a projection point of the terminal point of the auricle on the sagittal plane of the user, and the ratio of the second distance to the width of the auricle projected on the sagittal plane of the user in the sagittal axis direction is between 0.4 and 0.65. Through the arrangement, the sound generating part can extend into the concha cavity in a whole or partial structure under the wearing state, a better cavity-like structure is formed, and the output performance of the earphone is improved.

In some embodiments, a distance between a projection point of a midpoint of an upper side of the sound generating portion on a sagittal plane of the user and a projection point of a highest point of the auricle on the sagittal plane of the user is in a range of 24mm-36mm; the distance between the projection point of the midpoint of the lower side surface of the sounding part on the sagittal plane of the user and the projection point of the highest point of the auricle on the sagittal plane of the user is 36mm-54mm. Through the arrangement, the sounding part has a proper short axis direction size and is positioned at a proper position in a wearing state, so that the auditory effect of the earphone is improved while the auditory meatus of a user is not blocked.

In some embodiments, in the wearing state, a distance between a projection point of a midpoint of an upper side surface of the sound generating part on a sagittal plane of the user and a projection point of the upper vertex on the sagittal plane of the user is in a range of 21mm-32mm; the distance between the projection point of the midpoint of the lower side surface of the sounding part on the sagittal plane of the user and the projection point of the upper vertex on the sagittal plane of the user is 32mm-48mm. Through the arrangement, the size of the sounding part in the short axis direction can be designed, so that the sounding part is positioned at a proper position in a wearing state, the auditory meatus of a user is not blocked, and meanwhile, the auditory effect of the earphone is improved.

In some embodiments, the free end of the sound emitting portion is projected a distance of no more than 13mm from a point of projection of the edge of the concha cavity on the sagittal plane of the user. Through the arrangement, on one hand, the size of the sounding part in the long axis direction is limited, and the influence on the wearing comfort and carrying convenience of a user caused by the fact that the self weight of the sounding part is increased due to oversized size is avoided; on the other hand, the free end of the sound generating part is better matched with the concha cavity of the user, so that the comfort and stability of wearing of the user can be ensured while the earphone has a better sound listening effect.

In some embodiments, the projected point of the centroid of the sound emitting portion on the sagittal plane of the user is in the range of 23mm-52mm from the projected contour of the auricle on the sagittal plane of the user. Through the arrangement, the position of the sound generating part in the wearing state can be adjusted, so that the volume of the sound generated by the sound generating part, the sound leakage reducing effect and the comfort and stability in wearing are improved.

In some embodiments, a projected point of a centroid of the sound emitting portion onto a sagittal plane of the user is in a range of 18mm-43mm from a projection of the first portion of the earhook onto the sagittal plane of the user. Through above-mentioned setting, can make sounding portion and earhook can form effectual centre gripping to the ear, sounding portion stretches into the concha chamber and forms the simultaneously of better class cavity structure, sounding portion and earhook still can not lead to the fact the oppression to user's ear (e.g. the tragus), promotes the output performance and wears travelling comfort and stability of earphone.

In some embodiments, in the unworn state, a projected point of a centroid of the sound emitting portion at a particular reference plane is in a range of 13mm-38mm from a projected point of the first portion of the earhook at the particular reference plane.

In some embodiments, in the unworn state, an included angle between a line between a corresponding point of the extreme point on the ear hook and a centroid of the sound generating portion and a plane in which the ear hook lies is in a range of 10 ° -18 °. Through the arrangement, the sound generating part can be inserted into the concha cavity of the user in the wearing state to a proper degree, the sound generating part is prevented from blocking the auditory meatus of the user, and the output performance of the earphone is improved.

In some embodiments, the angle between the outer or inner side of the sound emitting part and the plane of the ear hook in the unworn state is in the range of 15 ° -25 °. Through the arrangement, the sound generating part can be inserted into the concha cavity of the user in the wearing state to a proper degree, the sound generating part is prevented from blocking the auditory meatus of the user, and the output performance of the earphone is improved.

In some embodiments, in the unworn state, the distance between the furthest point of the ear hook from the inner side surface of the sounding part and the inner side surface of the sounding part is 6mm-9mm, so that the ear of the user can be well accommodated between the ear hook and the sounding part in the wearing state of the earphone, and wearing comfort and stability of the earphone are improved.

In some embodiments, in the unworn state, a distance between a point on the sound generating portion furthest from a plane in which the ear hook is located and the plane in which the ear hook is located is 11.2mm to 16.8mm. Through the arrangement, the gap size formed by the sound generating part and the concha cavity is smaller, and meanwhile wearing comfort of a user is guaranteed.

In some embodiments, the first derivative of the first curve in a first preset coordinate system is continuous, a longitudinal axis of the first preset coordinate system is parallel to the first direction, and a transverse axis of the first preset coordinate system is parallel to a long axis direction of the sounding portion projection.

In some embodiments, the first derivative of the first curve in the first preset coordinate system has an inflection point.

In some embodiments, the number of inflection points is one.

In some embodiments, the inflection point both side portions have extreme points, respectively.

In some embodiments, the second derivative of the first curve in the first preset coordinate system is continuous.

In some embodiments, the second derivative of the first curve in the first preset coordinate system has a maximum point. Through the setting to the first curve, can design the ear-hook, make the ear-hook can better with user's ear adaptation, promote the stability and the travelling comfort of wearing of earphone.

Possible benefits of embodiments of the present description include, but are not limited to: (1) By setting the projection of the sounding part of the earphone on the sagittal plane and the inclination angle of the horizontal direction, the sounding part and the user concha cavity form a proper cavity-like structure, so that the output performance of the earphone is improved, the interference between the sounding part and the user ear is reduced, and the wearing comfort and stability of the earphone are improved; (2) Through the design to the ear-hook, promote the adaptation degree of ear-hook and user's ear, promote wearing travelling comfort and stability of earphone, can also make the sounding portion worn in suitable position simultaneously, promote the output performance of earphone. It should be noted that, the advantages that may be generated by different embodiments may be different, and in different embodiments, the advantages that may be generated may be any one or a combination of several of the above, or any other possible advantages that may be obtained.

Drawings

The present specification will be further elucidated by way of example embodiments, which will be described in detail by means of 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 an exemplary wearing schematic diagram of headphones according to some embodiments of the present description;

FIG. 4 is an exemplary schematic projection view of a headset in the sagittal plane of a user shown in accordance with some embodiments of the present disclosure;

FIG. 5 is an exemplary distribution diagram of a dual sound source with a cavity structure disposed around one of the sound sources according to some embodiments of the present disclosure;

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;

fig. 8A and 8B are exemplary wearing schematic diagrams of headphones according to some embodiments of the present description;

fig. 9 is an exemplary wearing schematic diagram of headphones according to further embodiments of the present description;

FIG. 10 is an exemplary schematic diagram of the location of the centroid of a sound emitting portion shown in accordance with some embodiments of the present disclosure;

FIG. 11A is a schematic illustration of exemplary positions of the inside surface of the sound emitting portion and the plane of the ear hook according to some embodiments of the present disclosure;

fig. 11B is a schematic diagram of a headset according to some embodiments of the present disclosure in an unworn state;

FIG. 12 is a schematic illustration of exemplary locations on an earhook at a point furthest from the inside of the sound emitting portion in perpendicular distance, according to some embodiments of the present disclosure;

FIG. 13 is an exemplary wearing schematic of headphones according to further embodiments of the present disclosure;

14A-14C are schematic views of different exemplary mating positions of the earphone with the user's ear canal according to the present description;

FIG. 15 is a schematic diagram of an exemplary fitted function curve of a first curve shown in accordance with some embodiments of the present description;

FIG. 16 is a schematic diagram of an exemplary first derivative curve of a fitted curve shown in accordance with some embodiments of the present description;

FIG. 17 is a schematic diagram of an exemplary second derivative curve of a fitted curve according to some embodiments of the present description.

Detailed Description

In order to more clearly illustrate the technical solutions of the embodiments of the present specification, 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 specification, and it is possible for those of ordinary skill in the art to apply the present specification 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.

It will be appreciated that "system," "apparatus," "unit" and/or "module" as used herein is one method for distinguishing between different components, elements, parts, portions or assemblies at different levels. However, if other words can achieve the same purpose, the words can be replaced by other expressions.

As used in this specification and the claims, the terms "a," "an," "the," and/or "the" are not specific to a singular, but may include a plurality, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that the steps and elements are explicitly identified, and they do not constitute an exclusive list, as other steps or elements may be included in a method or apparatus.

A flowchart is used in this specification to describe the operations performed by the system according to embodiments of the present specification. It should be appreciated that the preceding or following operations are not necessarily performed in order precisely. Rather, the steps may be processed in reverse order or simultaneously. Also, other operations may be added to or removed from these processes.

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 an ear hook and a sound emitting portion that is physically connected to the ear hook, and the ear hook may be adapted to the shape of the auricle to place the entire or partial structure of the sound emitting portion of the ear on the front side of the auricle foot 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 HMSII.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% fluctuations in the data ranges related to 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 an ear hook 12. In some embodiments, the earphone 10 may wear the sound generating part 11 on the user's body (e.g., the head, neck, or upper torso of a human body) through the ear hook 12, while the housing and transducer of the sound generating part 11 may be close to but not block the ear canal, so that the user's ear 100 remains open, and the user can obtain the sound of the external environment while hearing the sound output from the earphone 10. For example, the earphone 10 may be disposed around or partially around the circumference of the user's ear 100, and may transmit sound by means of air conduction or bone conduction.

In some embodiments, the housing may be for wearing on the body of the user and may carry the transducer. In some embodiments, the housing may be an enclosed housing structure with an interior hollow, and the transducer is located inside the housing. In some embodiments, the earphone 10 may be incorporated with eyeglasses, headphones, head mounted display devices, AR/VR helmets, or the like, in which case the housing may be worn in a hanging or clamping manner about the user's ear 100. In some alternative embodiments, a hanging structure (e.g., a hanger) may be provided on the housing. For example, the shape of the hook matches the shape of the auricle, and the earphone 10 may be independently worn on the user's ear 100 by the hook.

In some embodiments, the housing may be a housing structure having a shape that is adapted to the human ear 100, e.g., a ring, oval, polygon (regular or irregular), U-shape, V-shape, semi-circular, etc., so that the housing may hang directly against the user's ear 100. In some embodiments, the housing may further comprise a securing structure. The securing structure may include an ear hook, an elastic band, etc., so that the earphone 10 may be better worn on the user to prevent the user from falling off during use.

In some embodiments, the sound emitting portion 11 may be located above, below, on the front side of the user's ear 100 (e.g., area J on the front side of the tragus shown in fig. 1) or within the pinna (e.g., area M ₂ where the concha cavity is located) when the user wears the earphone 10. The sound generating portion 11 may be provided with two or more acoustic holes (for example, a sound emitting hole and a pressure releasing hole) for transmitting sound. In some embodiments, the transducers within the sound emitting portion 11 may output sound with a phase difference (e.g., opposite phase) through two or more acoustic holes.

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) is provided in the housing at a location on the front side of the diaphragm for transmitting sound. The front cavity is acoustically coupled to an acoustic port (e.g., an exit port) through which sound from the front side of the diaphragm may be emitted. A rear chamber (not shown) for transmitting sound is provided in the housing at a position of the rear side of the diaphragm. The rear chamber is acoustically coupled to another acoustic port (e.g., a pressure relief port) through which sound from the rear side of the diaphragm may be emitted. It is to be appreciated that when the diaphragm is vibrating, the front and back sides of the diaphragm may simultaneously produce a set of sounds having a phase difference (e.g., opposite phase). After passing through the front and rear chambers, respectively, sound propagates outwardly from the locations of the sound outlet port acoustically coupled to the front chamber and the pressure relief port acoustically coupled to the rear chamber. In some embodiments, the structure of the front cavity and the rear cavity can be set so that the sound output by the transducer at the sound outlet and the pressure relief hole meets specific conditions. For example, the lengths of the front and rear chambers may be designed such that a set of sounds having a particular phase relationship (e.g., opposite phases) may be output at the sound outlet and pressure relief holes. In some embodiments, the sound outlet may be located on an inner side wall (e.g., inner side IS) of the housing of the sound emitting portion 11 facing the external auditory meatus 101 of the user, and the pressure relief hole may be located on a side (e.g., outer side OS) of the housing of the sound emitting portion 11 facing away from the external auditory meatus 101 of the user.

Referring to fig. 1 and 2, 11A, 11B and 11C in fig. 2 are schematic views showing the state of different positions of the sound emitting portion 11 in the wearing state. In some embodiments, at least a portion of sound emitting portion 11 may be located in region J or anterolateral area M ₁ and region M ₂ of the anterior side of the tragus or pinna in user's ear 100 shown in fig. 1 when the user wears earphone 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 transducer 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 transducer may output sound to the external auditory meatus 101 of the user through the sound emitting hole. 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 the 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 direction of the sagittal axis, that is, the long axis direction Y is also disposed correspondingly inclined, and the short axis direction Z may have an angle with the direction of the vertical axis, that is, the short axis direction Z is also disposed obliquely, as in the inclined state of the sound generating portion 11B shown in fig. 2, the inclined state of the sound generating portion 11 shown in fig. 3, and the vertical state of the sound generating portion 11A shown in fig. 2.

Fig. 3 is an exemplary wearing schematic diagram of headphones according to some embodiments of the present description. In some embodiments, referring to fig. 3 and 11A, the sound generating portion 11 may have an inner side IS facing the ear portion and an outer side OS facing away from the ear portion in the thickness direction X in the wearing state, and a connection surface connecting the inner side IS and the outer side OS. It should be noted that: in the wearing state, the sound emitting portion 11 may be provided in a shape of a circle, an ellipse, a rounded square, a rounded rectangle, or the like, as viewed in the direction along the coronal axis (i.e., the thickness direction X). Wherein, when the sound generating part 11 is provided in a circular shape, an oval shape, or the like, the above-mentioned connection surface may refer to an arc-shaped side surface of the sound generating part 11; and when the sound emitting portion 11 is provided in the shape of a rounded square, a rounded rectangle, or the like, the above-described connection surfaces may include a lower side LS, an upper side US, and a rear side RS, which will be described later. Therefore, for convenience of description, the present embodiment is exemplarily described taking an example in which the sound emitting portion 11 is provided in a rounded rectangle. Here, the length of the sounding part 11 in the long axis direction Y may be larger than the width of the sounding part 11 in the short axis direction Z. As shown in fig. 3, the sound emitting portion 11 may have an upper side face US facing away from the external auditory meatus 101 in the short axis direction Z and a lower side face LS facing toward the external auditory meatus 101 in the wearing state, and a rear side face RS connecting the upper side face US and the lower side face LS, the rear side face RS being located at one end facing toward the rear of the brain in the long axis direction Y in the wearing state, and being located at least partially within the concha chamber 102.

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 11 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.).

Fig. 4 is an exemplary schematic projection view of a headset in the sagittal plane of a user, according to some embodiments of the present description. Referring to fig. 4, in some embodiments, in a wearing state, a first portion 121 of the ear hook 12 is hung between an auricle and a head of a user, and a second portion 122 extends toward a side of the auricle away from the head and is connected to the sound emitting portion 11, and the sound emitting portion 11 is worn near an ear canal but does not block the ear canal opening.

In some embodiments, the first portion 121 of the earhook 12 includes the battery compartment 13. A battery electrically connected to the sound generating portion 11 is provided in the battery compartment 13. In some embodiments, the battery compartment 13 is located at an end of the first portion 121 remote from the sound generating portion 11, and the projection profile of the end of the ear hook 12 remote from the sound generating portion 11 is the projection profile of the free end of the battery compartment 13 in the sagittal plane of the user. In some embodiments, the sound emitting portion 11 and the battery compartment 13 may be located on the front and rear sides of the auricle, respectively, when the earphone 10 is worn by the user.

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 earhook 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 earhook 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 ear hook 12 is provided with an elastic structure, so that the ear hook has a certain deformation amount in a wearing state, so that the positive pressure of the ear hook 12 on the ear and/or the head is increased, and the resistance of the earphone 10 falling off from the ear is increased. Third, the earhook 12 is at least partially disposed to rest against the ear and/or the head in a worn state, such that it forms a reaction force against the ear so 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 ear hook 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 a 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 earphone 10 falling off from the ear is increased.

As shown in fig. 3, in some embodiments, the sound emitting portion 11 has a fixed end CE connected to the ear hook 12 and a free end FE not connected to the ear hook 12. As an example, in connection with fig. 3, the free end FE of the sound emitting part 11 may protrude into the concha cavity in the worn state. Wherein, the sounding part 11 and the ear hook 12 can be arranged to jointly clamp the ear area from the front and rear sides of the ear area corresponding to the concha cavity, thereby increasing the resistance of the earphone 10 falling off from the ear, and further improving the stability of the earphone 10 in the wearing state. For example, the free end FE is pressed in the thickness direction X within the concha cavity; for another example, the free end FE abuts within the concha cavity in the long axis direction Y and the short axis direction Z (e.g., abuts against an inner wall of the opposite free end FE of the concha cavity). The sound generating portion 11 may be a regular or irregular structure, and the free end FE of the sound generating portion 11 is exemplified here for further explanation. For example, when the sound emitting unit 11 has a rectangular parallelepiped structure, the end wall surface of the sound emitting unit 11 is a flat surface, and at this time, the free end FE of the sound emitting unit 11 is an end side wall (i.e., the rear side surface RS, as shown in fig. 3) of the sound emitting unit 11 that is disposed opposite to the fixed end CE connected to the ear hook 12. For another example, when the sounding part 11 is a sphere, an ellipsoid, or an irregular structure, the free end FE of the sounding part 11 may refer to a specific area obtained by cutting the sounding part 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 CE, and the ratio of the size of the specific area along the long axis direction Y to the size of the sounding part 11 along the long axis direction Y may be 0.05 to 0.2.

It should be noted that: in the wearing state, the free end FE of the sound emitting portion 11 may be projected forward to fall on the antitragus, or may be projected forward to fall on the left and right sides of the head and to be positioned on the front side of the ear on the sagittal axis of the human body, in addition to extending into the concha. In other words, the ear hook 12 can support the sound emitting portion 11 to be worn to a wearing position such as the concha cavity, the antitragus, the front side of the ear, or the like.

The following describes the earphone 10 in detail, taking the earphone 10 shown in fig. 3 as an example. It is to be appreciated that the structure of the earphone 10 of fig. 3 and its corresponding parameters may also be equally applicable in the earphone of the other configurations mentioned above without departing from the corresponding acoustic principles.

By extending the sound emitting portion 11 at least partially into the concha cavity 102, 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, the semi-closed structure not being completely closed from the outside environment but having a leak structure (e.g., an opening, a slit, a duct, etc.) that is in acoustic communication with the outside 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 (e.g., an outer side surface OS 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 one sounding hole and a pressure release hole as an example, 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 wave phases of the two sound sources are opposite, the inner walls corresponding to the sounding part 11 and the concha cavity 102 form 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. 5.

Fig. 5 is an exemplary distribution diagram of a structure of a cavity disposed around one of the dual sound sources according to some embodiments of the present description. As shown in fig. 5, 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 an entrance of an ear canal, or may be an ear acoustic reference point, such as an ear reference point (EAR REFERENCE point, ERP), a tympanic membrane reference point (ear-drum reference point, DRP), or may be an entrance structure leading to a listener, or the like. 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 arrangement of the cavity structure 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. For the outside space, the secondary sound source 401A' and the sound source 401B form a dual sound source, which eliminates leakage. 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, while the outline of the concha cavity 102 of the user IS in an uneven structure, by extending part or the whole structure of the sound generating part 11 into the concha cavity 102, 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 102, further, the sound outlet IS arranged at a position (such as an inner side IS) of the shell of the sound generating part 11, which faces the ear canal opening of the user and IS close to the edge of the concha cavity 102, and the pressure relief hole IS arranged at a position of the sound generating part 11, which IS away from or far away from the ear canal opening, the acoustic model shown in fig. 5 can be constructed, so that the user can improve the listening position of the user at the ear canal opening and reduce the far-field sound leakage effect when wearing the earphone 10.

To facilitate understanding and description of the configuration of the headset 10 in the non-worn or worn state, the headset 10 may be projected onto a particular plane and the headset 10 described by parameters related to the projected shape on that plane. For example only, in the worn state, the earphone 10 may be projected on the sagittal plane of the human body to form a corresponding projected shape. In the non-wearing state, the relative positional relationship between the sagittal plane of the human body and the earphone 10 may be referred to, and the first plane similar thereto may be selected such that the projection shape formed by the projection of the earphone 10 on the first plane approximates to the projection shape formed by the projection of the earphone 10 on the sagittal plane of the human body. Wherein the first plane may be determined by: the ear-hook 12 is placed on a flat support surface (e.g. a horizontal table top, a ground plane, etc.), which support surface is the first surface corresponding to the earphone 10 when the ear-hook 12 is in contact with the support surface and placed stationary. Of course, to maintain uniformity of the particular plane corresponding to the worn and non-worn states, the first plane may also be a sagittal plane of the human body, and in some embodiments, the first plane may also be a plane that may refer to a bisector of the earhook 12 that bisects or substantially bisects it along its length.

Referring to fig. 4, in some embodiments, a first curve L ₁ of the earhook 12 in a projection of the sagittal plane of the user may be used as a reference curve for the earhook 12. In some embodiments, since the area where the ear hook 12 contacts the ear of the user is mainly the inner contour of the ear hook 12 in the wearing state of the earphone 10, the first curve L ₁ may be a reference curve corresponding to the inner contour of the projection of the ear hook 12 in the sagittal plane of the user. In some embodiments, the medial side IS and/or the lateral side OS of the sound generating portion 11 may be parallel to the sagittal plane of the user, and the long axis direction Y of the sound generating portion 11 may correspond to the long axis direction Y of the projection of the sound generating portion 11 on the sagittal plane of the user, and the short axis direction Z of the sound generating portion 11 may correspond to the short axis direction Z of the projection of the sound generating portion 11 on the sagittal plane of the user. In some embodiments, in the long axis direction Y of the projection of the sound generating portion 11, the inner contour corresponding curve of the projection of the ear hook 12 on the sagittal plane of the user has a leftmost end (point P ') and a rightmost end (point Q'), and the partial curve of the inner contour of the projection of the ear hook 12 on the sagittal plane of the user between the points P 'and Q' is the first curve L ₁. The point P 'actually corresponds to the point P on the ear hook 12, and the point Q' actually corresponds to the point Q on the ear hook 12, as shown in fig. 3.

Referring to fig. 4, in some embodiments, the long axis direction Y of the projection of the sound generating portion 11 on the sagittal plane may be taken as the x axis, the direction perpendicular to the x axis is taken as the Y axis, the intersection point of the x axis and the Y axis is taken as the origin o, and the first curve L ₁ may be regarded as a curve in the first straight-angle coordinate system xoy.

In some embodiments, the Y-axis direction may be referred to as a first direction, i.e., a direction perpendicular to the long axis direction Y of the projection of the sound emitting portion 11 in the sagittal plane of the user and toward the top of the user's head. In some embodiments, in the first rectangular coordinate system xoy, the first curve L ₁ has an extreme point N 'in the first direction, and the wearing condition of the earphone 10 (for example, a mechanical parameter during wearing and a position of the sound generating portion 11 relative to the ear during wearing) can be adjusted by setting a positional relationship between the extreme point N' and other positions on the ear hook 12 and the sound generating portion 11. Referring to fig. 3 and 4, in some embodiments, the extreme point N 'is located at the rear side of the vertex K (the projection point K' of the vertex K on the sagittal plane of the user) on the ear hook 12. That is, on projection of the ear hook 12 in the sagittal plane of the user, the extreme point N ' is located closer to the back of the user's brain than the projection point K ' of the upper vertex K. The specific determination process of the extreme point N' may refer to fig. 15-17 and the related description, and will not be described herein.

In some embodiments, the upper apex K of the earhook 12 may be the highest point of the inner contour of the earhook 12 along the user's vertical axis in the worn state, as shown in fig. 3. In some embodiments, the ear 100 may form a support for the earphone 10 primarily through the upper apex K of the earhook 12 when the earphone 10 is worn by the user. In some embodiments, the upper apex K of the earhook 12 may be the location of greatest curvature of the inner contour of the earhook 12 in the worn state, as shown in fig. 3 and 4. In some embodiments, the upper vertex K of the ear hook 12 may be the point on the inner contour of the ear hook 12 that is furthest from the end of the ear hook 12 (i.e., the end of the first portion 121, the free end of the battery compartment 13, and the end of the ear hook 12 that is not connected to the sound emitting portion 11) in the worn state, as shown in fig. 3 and 4. In some embodiments, the location of the upper apex K of the earhook 12 may satisfy one or more of the three locations described above simultaneously.

In some embodiments, the corresponding point of extremum point N' on the earhook 12 is point N (which may also be referred to as an earhook extremum point N), as shown in fig. 3. In some embodiments, the angle between the plane in which the ear hook 12 lies (i.e., the ear hook plane S ₁, shown in fig. 11A and 11B) and the sagittal plane of the user may be taken into account, thereby determining the corresponding point N of the extreme point N' on the ear hook 12.

In some embodiments, by setting the extreme point N 'of the first curve L ₁ to be located at the rear side of the projection point K' of the upper vertex K of the ear hook 12 on the sagittal plane of the user, the long axis direction Y of the projection of the sound generating portion 11 in the wearing state may have an angle with the horizontal direction, and the sound generating portion 11 is disposed obliquely downward in the direction from the fixed end CE to the free end FE of the sound generating portion 11, as shown in fig. 3.

By arranging the sound emitting portion 11 obliquely, at least part of the sound emitting portion 11 can be made to extend into the concha cavity of the user, forming the acoustic model shown in fig. 5. 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. 5 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) included therein is S ₀. 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 d ₀, and the distance from the center of the opening shape of the leakage structure to the other sound source (e.g., "-" shown in fig. 6) is L. As shown in fig. 7, the larger the relative opening size S/S ₀, the smaller the listening index, keeping L/d ₀ =1.09 unchanged. 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 free end FE of the sound emitting portion 11 abuts against the concha cavity and larger when the free 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. 5, 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 some embodiments, the sound emitting portion 11 may be a cuboid, cuboid-like, cylinder, ellipsoid, or other regular and irregular solid structure. When the sounding part 11 extends into the concha cavity, since the overall outline of the concha cavity is of an irregular structure like an arc, the sounding part 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, and the size of the attaching or covering between the sounding part 11 and the outline of the concha cavity can be approximately regarded as the non-perforated area S ₀ in the cavity-like structure shown in fig. 6, as shown in fig. 7, the larger the relative opening size S/S ₀ 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 earphone 10 is worn by a user, if the inclination angle α ₁ of the long axis direction Y of the sound generating portion 11 relative to the horizontal direction (i.e., the sagittal axis direction, such as the S axis shown in fig. 3 and 4) is too large or too small, for example, the long axis direction Y of the sound generating portion 11 is disposed parallel or approximately parallel to the horizontal direction and disposed vertically or approximately vertically (it is also understood that, when the long axis direction Y of the projection of the sound generating portion 11 on the sagittal plane of the user is disposed parallel or approximately parallel to the sagittal axis, i.e., the S axis and disposed vertically or approximately vertically), a gap of a larger size is formed when the sound generating portion 11 is attached to or covers a part of the concha cavity, which affects the listening volume of the user. The inclination angle α ₁ of the long axis direction Y of the projection of the sound emitting portion 11 on the sagittal plane of the user with respect to the horizontal direction (i.e., the sagittal axis direction, S axis shown in fig. 3 and 4) is an acute angle formed by the intersection between the long axis direction Y of the projection of the sound emitting portion 11 and the horizontal direction, as shown in fig. 3 and 4.

In some embodiments, when the user wears the earphone 10, the wearing angle of the sound emitting portion 11 with respect to the auricle and the concha cavity affects the position of the ear-hanging extremum point N. Specifically, the inclination angle α ₁ of the projection of the sound generating portion 11 in the long axis direction Y with respect to the horizontal direction is different, so that the positions of the first right angle coordinate system xoy are different, and the orientations of the first directions are different, thereby causing the positions of the extreme point N' and the ear-hook extreme point N with respect to the auricle to be different. For example, when the inclination angle α ₁ of the projection of the sound generating portion 11 in the longitudinal direction Y with respect to the horizontal direction is too large, the extreme point N' and the ear-hook extreme point N come too close to the brain of the user, and the distance between the ear-hook extreme point N and the upper vertex K in the longitudinal direction Y is too large, so that the fit between the first portion 121 of the ear hook 12 and the ear 100 is deteriorated, and the wearing stability of the earphone 10 is lowered. When the inclination angle α ₁ of the projection of the sounding part 11 in the long axis direction Y relative to the horizontal direction is too small, after the extremum point N' and the ear-hanging extremum point N are too far away from the brain of the user, the distance between the ear-hanging extremum point N and the upper vertex K in the long axis direction Y is too small, and the gaps between the upper side face US of the sounding part 11 and the concha cavity are too small or too small in number, so that the formed cavity-like opening is too small or too small, and the sound leakage reducing effect is poor. And when the distance is too small, the upper side surface US of the sound generating portion 11 may abut against the inner wall of the concha cavity, and may even excessively squeeze the concha cavity of the user, so that the user feels uncomfortable, and wearing comfort of the earphone 10 is affected.

In order to allow the whole or part of the area of the sound generating portion 11 to extend into the concha cavity and to increase the area of the sound generating portion 11 covering the concha cavity, to reduce the size of the gap formed between the sound generating portion 11 and the edge of the concha cavity and to increase the volume of the sound of the ear canal opening, in some embodiments, the inclination angle α ₁ of the projection of the sound generating portion 11 on the sagittal plane of the user with respect to the horizontal direction (i.e., the sagittal axis direction, the S axis as shown in fig. 3 and 4) may range from 10 ° to 28 ° in the wearing state of the earphone 10. Correspondingly, on the projection of the ear hook 12 on the sagittal plane of the user, the distance between the extreme point N 'and the projection point K' of the upper vertex K may be 6mm-15mm in the long axis direction Y of the sound emitting portion 11. In some embodiments, in order to obtain a better listening effect, the inclination angle α ₁ of the long axis direction Y of the projection of the sound generating portion 11 on the sagittal plane of the user with respect to the horizontal direction (i.e., the sagittal axis direction, S axis as shown in fig. 3 and 4) may range from 13 ° to 21 ° in the wearing state of the earphone 10. Correspondingly, the distance between the extreme point N 'and the projection point K' of the vertex K on the ear hook 12 on the sagittal plane of the user in the long axis direction Y of the projection of the sound generating portion 11 may be 7mm-12mm. In some embodiments, to further enhance the leakage reduction effect, the inclination angle α ₁ of the long axis direction Y of the projection of the sound generating portion 11 on the sagittal plane of the user with respect to the horizontal direction (i.e., the sagittal axis direction, S axis as shown in fig. 3 and 4) may range from 15 ° to 19 ° in the wearing state of the earphone 10. Correspondingly, the distance between the extreme point N 'and the projection point K' of the vertex K on the ear hook 12 on the sagittal plane of the user in the long axis direction Y of the projection of the sound generating part 11 may be 8mm-11mm.

It should be noted that the inclination angle of the projection of the upper side surface US on the sagittal plane and the horizontal direction of the lower side surface LS on the sagittal plane of the sounding part 11 may be the same as or different from the inclination angle of the long axis direction Y of the sounding part 11 and the horizontal direction. For example, when the upper side face US, the lower side face LS, and the long axis direction Y of the sounding part 11 are parallel, the inclination angle of the projection of the upper side face US on the sagittal plane and the projection of the lower side face LS on the sagittal plane and the inclination angle of the horizontal direction may be the same as the inclination angle of the long axis direction Y of the projection of the sounding part 11 on the sagittal plane and the horizontal direction. For another example, when the upper side surface US of the sounding part 11 is parallel to the long axis direction and the lower side surface LS is not parallel to the long axis direction Y, or one of the upper side surface US or the lower side surface LS is a planar wall and the other is a non-planar wall (for example, a curved wall), the inclination angle of the projection of the upper side surface US on the sagittal plane and the inclination angle of the projection of the sounding part 11 in the long axis direction Y are the same, and the inclination angle of the projection of the lower side surface LS on the sagittal plane and the inclination angle of the projection of the sounding part 11 in the long axis direction Y and the horizontal direction are different. In addition, when the upper side surface US or the lower side surface LS is a curved surface, the projection of the upper side surface US or the lower side surface LS on the sagittal plane may be a curve or a broken line, and at this time, the inclination angle of the projection of the upper side surface US on the sagittal plane may be an angle between a tangent line of a point with the maximum distance between the curve or the broken line and the ground plane and the horizontal direction, and the inclination angle of the projection of the lower side surface LS on the sagittal plane may be an angle between a tangent line of a point with the minimum distance between the curve or the broken line and the ground plane and the horizontal direction. In some embodiments, when the upper side surface US or the lower side surface LS is a curved surface, a tangent line parallel to the long axis direction Y on the projection thereof may be selected, and the angle between the tangent line and the horizontal direction represents the inclination angle between the projection of the upper side surface US or the lower side surface LS on the sagittal plane and the horizontal direction.

It should be noted that, the method for measuring the relevant distance and angle of the earphone 10 projected on the sagittal plane of the user may be: for the earphone 10, a photo parallel to the projection plane (sagittal plane of the user) is taken, the relevant distance and angle are measured on the photo, and then the actual data of the relevant distance and angle on the projection plane can be obtained by scaling according to the scale of the photo.

In some embodiments, instead of reflecting the distance between the extreme point N and the upper vertex K of the ear-hook by the distance of the projection points described above, an actual measurement may be performed on the ear-hook 12. In some embodiments, the distance between the supra-aural extreme point N and the upper vertex K may be 6mm-12mm. In some embodiments, to further enhance the leakage reduction effect, the distance between the ear-hook extreme point N and the upper vertex K on the ear-hook 12 may be 7mm-11mm. In some embodiments, in order to make the cavity-like structure formed by the sound generating part 11 and the concha cavity have more suitable volume and opening size/number, the distance between the extreme point N and the upper vertex K of the ear hook 12 may be 8mm-11mm.

In some embodiments, since the ear 100 forms a support for the earphone 10 primarily through the upper apex K of the earhook 12, it may be considered a "support lever" that forms the upper apex K as a support point when the earphone 10 is worn by a user. In some embodiments, the position of the ear-hook extreme point N may be the position where the cross section of the ear-hook 12 is smallest, so that the ear-hook 12 is more easily deformed at the ear-hook extreme point N, and thus, when the earphone 10 is worn by the user, the first portion 121 of the ear-hook 12 and the sounding portion 11 form a structure similar to a "clamping force lever" with the ear-hook extreme point N as a fulcrum, and clamp the two sides of the ear of the user (for example, the front and rear sides of the concha cavity). In order to improve the stability of the "support lever" and the "clamping force lever", the positions of the centroid H, the upper apex K, and the ear-hook extreme point N of the sound emitting portion 11 will be described in further detail below.

In some embodiments, the location of the centroid H of the sound emitting portion 11 may be directly set to improve the wearing stability and listening effect of the earphone 10. As shown in fig. 3 and 4, in some embodiments, a projected point H' of the centroid H of the sound emitting portion 11 on the sagittal plane of the user may coincide with the centroid of the projection of the sound emitting portion 11 on the sagittal plane of the user. In some embodiments, on the earphone 10, by changing the distance between the centroid H of the sound generating portion 11 and the extreme point N of the ear hook, the covering position of the sound generating portion 11 in the concha cavity and the clamping position of the sound generating portion 11 for clamping the concha cavity in the wearing state can be changed simultaneously, so that not only the stability and comfort of the user wearing the earphone 10 can be affected, but also the listening effect of the earphone 10 can be affected.

When the shape and the size of the sounding part 11 are consistent, if the distance between the centroid H of the sounding part 11 and the ear-hanging extreme point N is too large, the sounding part 11 is located in the concha cavity and is biased downward, and a gap between the upper side surface US of the sounding part 11 and the concha cavity is too large, so that the hearing effect is poor. Moreover, if the distance between the centroid H of the sound emitting portion 11 and the ear-hook extreme point N is too large, excessive interference is formed between the sound emitting portion 11 (or the connection region between the ear-hook 12 and the sound emitting portion 11) and the tragus, so that the sound emitting portion 11 excessively presses the tragus, and wearing comfort is affected.

When the shape and the size of the sounding part 11 are consistent, if the distance between the centroid H of the sounding part 11 and the extreme point N of the ear hook is too small, the upper side surface US of the sounding part 11 is attached to the upper edge of the concha cavity, and the gaps between the upper side surface US and the concha cavity are too small or too small in number, even the inside and the outside environment are completely sealed and isolated, and the structure similar to the cavity cannot be formed. Moreover, if the distance between the centroid H of the sound emitting portion 11 and the ear-hook extreme point N is too small, the sound emitting portion 11 (or the connection region of the ear-hook 12 and the sound emitting portion) may excessively press the outer contour of the ear, and the wearing comfort may be also affected.

In some embodiments, the centroid of the projection of the centroid H of the sound emitting portion 11 onto the sagittal plane of the user and the centroid of the projection of the sound emitting portion 11 onto the sagittal plane of the user are points H ', and the points H ' lie on the long axis of the projection of the sound emitting portion 11, i.e., the points H ' lie on the x-axis. In some embodiments, in order to make the earphone 10 have a better listening effect in the wearing state, the distance between the extreme point N 'and the projection point H' of the centroid H of the sound generating part 11 on the sagittal plane of the user may be 20mm-30mm. In some embodiments, to further enhance the leakage reduction effect, the distance between the extreme point N 'and the projection point H' of the centroid H of the sound generating part 11 on the sagittal plane of the user may be 22mm-26mm. In some embodiments, in order to make the cavity-like structure formed by the sound generating part 11 and the concha cavity have more proper volume and opening size/number, and make the clamping position of the sound generating part 11 be located at a preferred position in the concha cavity, the distance between the extreme point N 'and the projection point H' of the centroid H of the sound generating part 11 on the sagittal plane of the user may be 23mm-25mm.

In some embodiments, instead of reflecting the distance between the centroid H of the sound generating portion 11 and the ear-hook extreme point N by the distance of the projection points described above, actual measurement may be performed on the ear hook 12. In some embodiments, on the earphone 10, in order to make the earphone 10 have a better listening effect in the wearing state, the distance between the centroid H of the sound emitting portion 11 and the ear-hanging extreme point N may be 20mm-30mm. In some embodiments, to further enhance the leakage reduction effect, the distance between the centroid H of the sound generating portion 11 and the ear-hook extreme point N may be 24mm-26mm on the earphone 10. In some embodiments, in order to make the cavity-like structure formed by the sound generating part 11 and the concha cavity have more proper volume and opening size/number, and make the clamping position of the sound generating part 11 be located at a preferred position in the concha cavity, on the earphone 10, the distance between the centroid H of the sound generating part 11 and the extreme point N of the ear hook may be 24mm-26mm.

In some embodiments, the angle between the line between the centroid H of the sound emitting portion 11 and the ear-hook extreme point N and the long axis direction Y of the sound emitting portion 11 may affect the position where the sound emitting portion 11 protrudes into the concha cavity. When the included angle between the connecting line between the centroid H of the sounding part 11 and the ear-hanging extreme point N and the long axis direction Y of the sounding part 11 is too large, the position of the sounding part 11 in the concha cavity is biased downwards, and the gap between the upper side face US of the sounding part 11 and the concha cavity is too large, so that the hearing effect is weaker. When the included angle between the connecting line between the centroid H of the sounding part 11 and the ear-hanging extreme point N and the long axis direction Y of the sounding part 11 is too small, the upper side face US of the sounding part 11 is attached to the upper edge of the concha cavity, and the gaps between the upper side face US and the concha cavity are too small or too small in number, so that the sound leakage reducing effect is poor.

In some embodiments, for convenience of measurement, the angle between the line between the centroid H of the sound generating part 11 and the ear-hook extreme point N and the long axis direction Y of the sound generating part 11 may be characterized by the angle α ₂ between the line between the projection point H 'of the centroid H of the sound generating part 11 and the extreme point N' and the long axis direction Y (i.e., x-axis direction) of the projection of the sound generating part 11. In some embodiments, the range of the included angle α ₂ between the point of the extreme point N ' and the projection point H ' of the centroid H of the sound generating portion 11 and the long axis direction Y (i.e., the x-axis direction) of the projection of the sound generating portion 11 may be smaller than 90 °, so that the projection point H ' of the centroid H of the sound generating portion 11 is located at the rear side of the extreme point N ' in the long axis direction Y of the sound generating portion 11, i.e., the centroid H of the sound generating portion 11 is closer to the brain of the user than the corresponding point N of the extreme point N ' on the earhook 12, to further enhance the stability of the aforementioned "clamping force lever". Note that, the included angle α ₂ between the line N 'H' between the extreme point N 'and the projection point H' of the centroid of the sounding part 11 and the long axis direction Y of the projection of the sounding part 11 refers to a smaller included angle formed by intersecting the line N 'H' and the long axis direction Y, as shown in fig. 4.

In some embodiments, for better listening, the angle α ₂ between the line N 'H' between the point of the extreme point N 'and the projection point H' of the centroid H of the sound generating part 11 and the long axis direction Y of the projection of the sound generating part 11 may range from 65 ° to 85 °. In some embodiments, to further enhance the leakage-reducing effect, the angle α ₂ between the line N 'H' between the point of the extreme point N 'and the projection point H' of the centroid H of the sound generating portion 11 and the long axis direction Y of the projection of the sound generating portion 11 may range from 70 ° to 80 °. In some embodiments, in order to make the cavity-like structure formed by the sound generating portion 11 and the concha cavity have more suitable volume and opening size/number, and make the clamping position of the sound generating portion 11 be located at a preferred position in the concha cavity, an included angle α ₂ between a line N 'H' between a point of the extreme point N 'and a projection point H' of the centroid H of the sound generating portion 11 and a long axis direction Y of the projection of the sound generating portion 11 may range from 75 ° to 79 °.

In some embodiments, the angle between the line between the centroid H of the sound generating portion 11 and the ear-hook extreme point N and the long axis direction Y of the sound generating portion 11 may be characterized by an actual angle in three dimensions. In some embodiments, for better listening, the angle between the line between the centroid H of the sound generating part 11 and the extreme point N of the ear hook and the long axis direction Y of the sound generating part 11 may be in the range of 70 ° -85 ° on the earphone 10. In some embodiments, to further enhance the leakage reduction effect, the angle between the line between the centroid H of the sound generating part 11 and the ear-hook extreme point N and the long axis direction Y of the sound generating part 11 may be in the range of 75 ° -80 ° on the earphone 10. In some embodiments, in order to make the cavity-like structure formed by the sound generating portion 11 and the concha cavity have more suitable volume and opening size/number, and make the clamping position of the sound generating portion 11 be located at a preferred position in the concha cavity, on the earphone 10, an included angle between a line between a centroid H of the sound generating portion 11 and an ear-hook extreme point N and a long axis direction Y of the sound generating portion 11 may be in a range of 77 ° to 80 °. The distance measurement of different points on the earphone 10 in the three-dimensional space may be performed in a suitable manner according to the actual situation. For example, for the earphone 10 in the non-wearing state, after determining the positions of two points to be measured on the ear hook 12, the distance of the two points may be measured directly with a scale; for the earphone 10 in the wearing state, the relative positions of the parts of the earphone 10 can be fixed first, and then the earphone 10 is taken down from the ear (or the ear model for wearing is removed), so that the form of the earphone 10 in the wearing state is simulated, and meanwhile, the distance between different points on the ear hook 12 can be conveniently and directly measured by using a staff gauge.

In some embodiments, where the overall volume of the earhook 12 does not vary much, the location between the upper apex K and the centroid H of the sound emitting portion 11 may represent the relative position of the sound emitting portion 11 at the ear when the earphone 10 is worn. In particular, when the distance between the centroid H of the sound generating portion 11 and the upper vertex K of the ear hook 12 is too large, the position of the sound generating portion 11 may be closer to the ear meatus of the user when the user wears the earphone 10, resulting in that the position of the sound generating portion 11 in the concha cavity is lower, and the gap between the upper side face US of the sound generating portion 11 and the concha cavity is too large, resulting in weaker listening effect. When the distance between the centroid H of the sounding part 11 and the upper vertex K of the ear hook 12 is too small, the upper side face US of the sounding part 11 is attached to the upper edge of the concha cavity, and the gaps between the upper side face US and the concha cavity are too small or too small in number, so that the sound leakage effect is poor.

In some embodiments, the positional relationship between the centroid H and the upper vertex K of the sound emitting portion 11 may be characterized by their respective positional relationship between the projected points of the sagittal plane of the user. As shown in fig. 4, in some embodiments, in the projection of the earphone 10 on the sagittal plane of the user, in order to obtain a better listening effect, the distance between the projection point K 'of the upper vertex K and the projection point H' of the centroid H of the sound generating part 11 may be 20mm-30mm. In some embodiments, to further enhance the leakage reduction effect, the distance between the projection point K 'of the upper vertex K and the projection point H' of the centroid H of the sound generating part 11 may be 22mm-28mm on the projection of the earphone 10 on the sagittal plane of the user. In some embodiments, in order to make the cavity-like structure formed by the sound generating part 11 and the concha cavity have more suitable volume and opening size/number, the distance between the projection point K 'of the upper vertex K and the projection point H' of the centroid H of the sound generating part 11 may be 24mm-25mm on the projection of the earphone 10 on the sagittal plane of the user.

In some embodiments, the positional relationship between the centroid H and the upper vertex K of the sound emitting portion 11 can be characterized by their actual positions in three-dimensional space. In some embodiments, in order to obtain a better listening effect, the distance between the upper vertex K and the centroid H of the sound generating part 11 on the earphone 10 may be 20mm-30mm. In some embodiments, to further enhance the leakage reduction effect, the distance between the upper apex K and the centroid H of the sound generating portion 11 on the earphone 10 may be 22mm-28mm. In some embodiments, in order to make the cavity-like structure formed by the sound emitting part 11 and the concha cavity have more suitable volume and opening size/number, the distance between the upper vertex K and the centroid H of the sound emitting part 11 may be 24mm-26mm on the earphone 10.

In some embodiments, the angle between the line between the centroid H of the sound generating portion 11 and the upper apex K of the ear hook 12 and the long axis direction Y of the sound generating portion 11 may affect the stability of the earphone 10 in the worn state. When the included angle between the connecting line between the centroid H of the sounding part 11 and the upper vertex K of the ear hook 12 and the long axis direction Y of the sounding part 11 is too large, the free end FE of the sounding part 11 is far away from the side wall of the user's concha cavity, and the sounding part 11 is weak in clamping the concha cavity and is unstable to wear. When the included angle between the connecting line between the centroid H of the sounding part 11 and the upper vertex K of the ear hook 12 and the long axis direction Y of the sounding part 11 is too small, the free end FE of the sounding part 11 is too tightly matched with the user's concha cavity, so that the wearing comfort of the earphone 10 is affected.

In some embodiments, for ease of measurement, the angle between the line between the centroid H of the sound generating portion 11 and the upper vertex K of the ear hook 12 and the long axis direction Y of the sound generating portion 11 may be characterized by the angle α ₃ between the line between the projection point H 'of the centroid H of the sound generating portion 11 and the projection point K' of the upper vertex K and the long axis direction Y of the projection of the sound generating portion 11. In some embodiments, in order to provide the earphone 10 with high wearing stability and comfort, an angle α ₃ between a line K 'H' between a projection point K 'of the upper vertex K and a projection point H' of the centroid H of the sound generating portion 11 and a long axis direction Y of the projection of the sound generating portion 11 may range from 45 ° to 65 ° on a projection of the earphone 10 on a sagittal plane of a user. Note that, the included angle α ₃ between the line K 'H' between the projection point K 'of the upper vertex K and the projection point H' of the centroid H of the sounding part 11 and the long axis direction Y of the projection of the sounding part 11 refers to an acute angle formed by the line K 'H' intersecting with the Y axis direction, as shown in fig. 4. In some embodiments, to further enhance the wearing stability of the earphone 10, an angle α ₃ between a line K 'H' between a projection point K 'of the upper vertex K and a projection point H' of the centroid H of the sound generating portion 11 and a long axis direction Y of the projection of the sound generating portion 11 may range from 48 ° to 55 °. In some embodiments, to further enhance the comfort of the earphone 10, the angle α ₃ between the line K 'H' between the projection point K 'of the upper vertex K and the projection point H' of the centroid H of the sound generating portion 11 and the long axis direction Y of the projection of the sound generating portion 11 may range from 50 ° to 52 °.

In some embodiments, the angle between the line between the centroid H of the sound emitting portion 11 and the upper apex K of the earhook 12 and the long axis direction Y of the sound emitting portion 11 can be characterized by an actual angle in three dimensions. In some embodiments, for high wearing stability and comfort of the earphone 10, the angle α ₃ between the line between the centroid H of the sound generating portion 11 and the upper vertex K of the ear hook 12 and the long axis direction Y of the sound generating portion 11 may be 45 ° -65 °. In some embodiments, to further enhance the wearing stability of the earphone 10, the angle α ₃ between the line between the centroid H of the sound generating portion 11 and the upper apex K of the earhook 12 and the long axis direction Y of the sound generating portion 11 may be 47 ° -54 °. In some embodiments, to further enhance the comfort of the earphone 10, the angle α ₃ between the line between the centroid H of the sound generating portion 11 and the upper apex K of the earhook 12 and the long axis direction Y of the sound generating portion 11 may be 51 ° -52 °.

Fig. 8A and 8B are exemplary wearing schematic diagrams of headphones according to some embodiments of the present description.

In conjunction with fig. 3 and 8A, 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. 8A) 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 U may be defined around the sound generating portion 11 projection (i.e., the first projection) shown in fig. 8A and 8B, and the centroid of the rectangular area indicated by the solid line U may be regarded as approximately the centroid of the first projection. As described above, the projection point H 'of the centroid H of the sound generating unit 11 on the sagittal plane of the user coincides with the centroid of the projection of the sound generating unit 11 on the sagittal plane of the user, and thus the centroid of the first projection is the point H'. 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. In some embodiments, to more clearly describe the first projection area of the sound emitting portion, the solid line box U is determined by determining two points of the sound emitting portion 11 that are farthest apart in the long axis direction Y, and making a first line segment and a second line segment parallel to the short axis direction Z, respectively, through the two points. 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 U shown in fig. 8A and 8B can be obtained from a region formed by the above line segments.

In some embodiments, the pinna has a second projection on the sagittal plane along the coronal axis R direction. The highest point of the second projection may be understood as the point whose distance in the vertical axis direction is the largest with respect to the projection point of a certain point of the neck of the user on the sagittal plane, that is, the projection point of the highest point of the auricle (for example, the point a ₁ in fig. 8A) 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 all projection points have the smallest distance in the vertical axis direction with respect to the projection on the sagittal plane of a certain point of the user's neck, that is, the projection of the lowest point of the auricle (for example, the point a ₂ in fig. 8A) 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. 8A), that is, the distance between the point a ₁ and the point a ₂ in the vertical axis T direction. The end point of the second projection may be understood as the point of all its projection points which is 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 B ₁ shown in fig. 8A) 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 B ₂ shown in fig. 8A) 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 of the second projection at which the distance in the sagittal direction is greatest and the point of the second projection at which the distance in the sagittal direction is smallest with respect to the projection of the tip of the nose on the sagittal plane (width w shown in fig. 8A), that is, the distance of the point B ₁ from the point B ₂ 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, when the ratio of the first distance H ₁ of the centroid H of the sound generating portion 11 at the projection point H ' (i.e., the centroid H ' of the first projection) of the user's sagittal plane to the height H of the second projection of the auricle at the vertical axis direction of the highest point of the second projection of the auricle at the user's sagittal plane is between 0.25 and 0.6, the ratio of the projection point H ' (i.e., the centroid H ' of the first projection) of the centroid H of the sound generating portion 11 at the user's sagittal plane to the second distance w ₁ of the second projection end point of the auricle at the user's sagittal axis direction to the width w of the second projection of the auricle at the user's sagittal axis direction is between 0.4 and 0.7, the portion or the entire structure of the sound emitting portion 11 may substantially cover the antitragus region of the user (e.g., in the triangular fossa, the upper lobe of the antitragus, the lower lobe of the antitragus, or the position of the antitragus, the position of the sound emitting portion 11C relative to the ear shown in fig. 2), or the portion or the entire structure of the sound emitting portion 11 may extend into the concha cavity (e.g., the position of the sound emitting portion 11B relative to the ear shown in fig. 2). In some embodiments, in order for the overall or partial structure of the sound-emitting portion 11 to cover the antitragus region of the user (e.g., the position of the triangle fossa, the upper lobe of the antitragus, the lower lobe of the antitragus, or the antitragus, such as the position of the sound-emitting portion 11C relative to the ear shown in fig. 2), the ratio of the projected point H 'of the centroid H of the sound-emitting portion 11 in the user sagittal plane (i.e., the centroid H' of the first projection) to the height H of the highest point of the second projection of the auricle in the user sagittal plane in the vertical axis direction is between 0.25-0.4; the ratio of the projection point H '(i.e. the centroid H' of the first projection) of the centroid H of the sound generating portion 11 in the user sagittal plane to the second distance w1 of the end point of the second projection of the auricle in the user sagittal plane in the sagittal axis direction to the width w of the second projection of the auricle in the user sagittal plane is between 0.4 and 0.6. 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 that the whole or part of the structure of the sound generating portion 11 may extend into the concha cavity, for example, the ratio of the first distance H ₁ of the highest point of the centroid H of the sound generating portion 11 projected in the vertical axis direction of the second projection of the auricle in the user sagittal plane to the height H of the second projection of the auricle in the vertical axis direction of the second projection of the auricle in the user sagittal plane may be between 0.35 and 0.6, and the ratio of the second distance w ₁ of the centroid H of the sound generating portion 11 projected in the user sagittal plane to the second distance w ₁ of the highest point of the auricle in the user sagittal plane projected in the vertical axis direction of the second projection of the auricle in the user sagittal plane with respect to the position of the ear shown in fig. 2 may be between 0.4 and 0.65. In the earphone provided in this embodiment of the present disclosure, the ratio of the first distance H ₁ between the centroid H ' of the first projection (i.e., the projection point H ' of the sound generating portion 11 in the sagittal plane of the user) and the height H of the highest point of the second projection of the auricle in the sagittal plane of the user in the vertical axis direction is controlled to be between 0.35 and 0.6, and the ratio of the second distance w ₁ between the centroid H ' 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 controlled to be between 0.4 and 0.65, so that the sound generating portion 11 at least partially extends into the concha cavity and forms an acoustic model shown in fig. 5 with the concha cavity of the user, thereby improving the volume of the earphone at the listening position (e.g., at the ear canal opening), in particular, the volume of the middle-low frequency listening sound, while maintaining a good far-field sound-leakage 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 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 area of the second projection 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 simultaneously reduce the load of the user when wearing, so that the earphone is convenient for daily carrying of the user. Under the premise, when the ratio of the first distance H ₁ between 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 a ₁ of the auricle on the sagittal plane to the height H between the first distance H ₁ and the height H of the second projection on the vertical axis direction is too small or too large in the wearing state, the partial 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 may occur. In order to ensure that the earphone does not block the ear canal opening of the user, the stability and the comfort of the earphone worn by the user are ensured, and the better listening effect is achieved, in some embodiments, the ratio of the first distance H ₁ between the centroid H' of the first projection and the highest point A ₁ of the second projection in the vertical axis direction to the height H between the first distance H ₁ between the centroid H and the height H between the first projection in the vertical axis direction are controlled to be between 0.35 and 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, 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. 5 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. In some embodiments, to further improve the wearing stability and comfort of the earphone 10, the ratio of the first distance H ₁ of the centroid H' of the first projection to the highest point a ₁ of the second projection in the vertical axis direction to the height H of the second projection in the vertical axis direction is controlled to be between 0.35 and 0.55. In some embodiments, to further improve the wearing stability and comfort of the earphone 10, the ratio of the first distance H ₁ between the centroid H' 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 controlled to be between 0.4 and 0.5.

Similarly, when the ratio of the second distance w ₁ between the centroid H' 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, the 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 also causes the problem that the sound emitting portion 11 cannot construct the acoustic model shown in fig. 5 with the concha cavity, and also causes the wear of the earphone 10 to be unstable. Based on this, in the earphone provided in the embodiment of the present disclosure, by controlling the ratio of the second distance w ₁ between the centroid H' 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 to be between 0.4 and 0.7, the wearing stability and comfort of the earphone 10 can be improved while the acoustic output effect of the sound emitting portion 11 is ensured. In some embodiments, to further enhance the acoustic output effect of the sound generating portion 11, the wearing stability and comfort of the earphone 10 are improved, and the ratio of the second distance w ₁ between the centroid H' 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 may be 0.45-0.68. In some embodiments, to further enhance the acoustic output effect of the sound generating portion 11, the wearing stability and comfort of the earphone 10 are improved, and the ratio of the second distance w ₁ between the centroid H' 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 controlled to be 0.5-0.6.

As a specific example, the height H of the second projection in the vertical axis direction may be 55mm to 65mm, and in the wearing state, if the first distance H ₁ between the centroid H 'of the first projection and the projection of the highest point of the second projection in the vertical axis direction is smaller than 15mm or larger than 50mm, the sound generating portion 11 may be located at a position further from the concha cavity, and not only the acoustic model shown in fig. 5 may not be constructed, but also there may be a problem of unstable wearing, so, in order to ensure the acoustic output effect of the sound generating portion 11 and the wearing stability of the earphone 10, the first distance H ₁ between the centroid H' of the first projection and the highest point of the second projection in the vertical axis direction may be controlled to be 15mm to 50 mm. Similarly, in some embodiments, the width w of the second projection in the sagittal axis direction may be 40mm-55mm, and when the projection of the centroid H 'of the first projection in the sagittal axis direction is greater than 45mm or less than 15mm from the second distance w ₁ of the end point of the second projection in the sagittal axis direction, the sounding part 11 may be too far forward or too far backward with respect to the ear of the user, which may also cause the problem that the sounding part 11 cannot construct the acoustic model shown in fig. 5, and may also cause the earphone 10 to be unstable to wear, so, in order to ensure the acoustic output effect of the sounding part 11 and the wearing stability of the earphone, the centroid H' of the first projection and the second distance w ₁ of the end point of the second projection in the sagittal axis direction may be controlled to be between 15mm-45 mm.

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 free 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. 5, 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 ratio of the first distance H ₁ between the centroid H '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 can be controlled to be between 0.35 and 0.6, and the ratio of the second distance w ₁ between the centroid H' 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 can be controlled to be between 0.4 and 0.65. In some embodiments, in order to improve the wearing comfort of the earphone 10 while ensuring the acoustic output quality of the sound emitting portion 11, the ratio of the first distance H ₁ of the centroid of the first projection to the height H of the second projection in the vertical axis direction of the highest point of the second projection may be between 0.35 and 0.55, and the ratio of the second distance w ₁ of the centroid H' 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 may be between 0.45 and 0.68. In some embodiments, to further improve the acoustic output quality of the sound generating portion 11 and the wearing comfort of the ear phone 10, the ratio of the first distance H ₁ of the centroid H 'of the first projection to the height H of the second projection in the vertical axis direction of the highest point of the second projection may be between 0.35 and 0.5, and the ratio of the second distance w ₁ of the centroid H' 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 may be between 0.48 and 0.6.

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 centroid H' of the first projection to the first distance H ₁ of 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 shape, the width w of the second projection in the sagittal direction is smaller than the width w of the second projection in the sagittal direction, and the second distance w ₁ between the centroid H 'of the first projection and the end point of the second projection in the sagittal direction is smaller, and in this case, the ratio of the second distance w ₁ between the centroid H' 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 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 distance between the centroid H' 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. 8B, where the highest point a ₃ and the lowest point a ₄ 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 point at the junction between the pinna and the head is understood to be the position 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 H '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 second distance w ₁ of the centroid H' 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. In some embodiments, in order to enhance wearing comfort of the earphone 10 while ensuring the acoustic output effect of the sound emitting portion 11, a ratio of a distance H ₃ of a highest point of projection of a connection region of the auricle and the head in a sagittal plane in a vertical axis direction to a height H ₂ of the highest point and the lowest point of projection of the connection region of the auricle and the head in the sagittal plane in the vertical axis direction may be controlled to be between 0.45 and 0.6, and a ratio of a second distance w ₁ of a tip point of the first projection and 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. In some embodiments, to further enhance the acoustic output effect of the sound generating portion 11 and the wearing comfort of the ear phone 10, a ratio of a distance H ₃ of a highest point of projection of the connection region of the auricle and the head in the sagittal plane in the vertical axis direction to a height H ₂ of the highest point and the lowest point of projection of the connection region of the auricle and the head in the sagittal plane in the vertical axis direction may range from 0.5 to 0.6, and a ratio of a second distance w ₁ of the centroid H' 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 may range from 0.48 to 0.6.

Fig. 9 is an exemplary wearing schematic diagram of headphones according to further embodiments of the present description. Referring to fig. 3 and 9, when the user wears the earphone 10, the projection point H 'of the centroid H of the sound generating portion 11 on the sagittal plane (i.e., the centroid H' of the first projection of the sound generating portion 11 on the sagittal plane) may be located in an area surrounded by the contour of the second projection of the auricle on the sagittal plane, where the contour of the second projection may be understood as a projection of the contour of the auricle, the auricle contour, the tragus contour, the inter-screen notch, the opposite-screen tip, the wheel-screen notch, etc. of the user on the sagittal plane. 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 H' 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 H '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 H' 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. 5) with the concha cavity, and the acoustic output effect of the earphone 10 is affected. To ensure the acoustic output quality when the user wears the earphone 10, in some embodiments, the centroid H 'of the first projection may be in the range of 10mm-52mm from the contour of the second projection when the sound emitting portion 11 protrudes into the concha cavity, that is, the centroid H' of the first projection may be in the range of 10mm-52mm from any point of the contour of the second projection. In some embodiments, to further enhance the wearing comfort of the earphone 10 and to optimize the cavity-like structure formed by the cooperation of the sound emitting portion 11 and the concha cavity, the centroid H' of the first projection may be spaced from the contour of the second projection by a distance ranging between 12mm-50.5 mm. In some embodiments, 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 emitting portion 11 and the concha cavity, the distance between the centroid H' of the first projection and the contour of the second projection may also be between 13.5mm and 50.5 mm. In some embodiments, by controlling the distance between the centroid H' 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. 5, thereby ensuring that the sound output by the sounding part 11 can be well transmitted to the user. As a specific example, in some embodiments, the minimum distance d ₁ of the centroid H' of the first projection from the contour of the second projection may be 20mm and the maximum distance d ₂ may be 48.5mm. In some embodiments, when the earphone 10 is worn in a state in which at least part of the sound emitting portion 11 covers the antitragus region of the user, the ear canal opening can be fully exposed, so that the user can better receive the sound in the external environment. At this time, the centroid H ' of the first projection of the sound emitting part 11 on the sagittal plane of the user's head may be located in the area surrounded by the outline of the second projection, but in this wearing state, there may be a certain difference in the distance range between the centroid H ' of the first projection of the sound emitting part 11 on the sagittal plane of the user's head and the outline of the second projection, compared to when at least part of the sound emitting part 11 is projected into the user's concha. 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 free 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 distance between the centroid H' of the first projection and the contour of the second projection may be between 13mm and 54mm, so that the sound generating portion 11 has a better acoustic output quality. In some embodiments, to further enhance the acoustic output quality of the sound emitting portion 11, the centroid H' of the first projection may be in a distance range between 18mm-50mm from the contour of the second projection. In some embodiments, the centroid H' of the first projection may also be in the range of 20mm-45mm from the contour of the second projection in order to further enhance the acoustic output quality of the sound emitting portion 11. In some embodiments, by controlling the centroid H 'of the first projection of the sound emitting portion 11 on the sagittal plane of the user's head to a distance ranging from 23mm to 40mm from the contour of the second projection, the sound emitting portion 11 may be positioned approximately in the antitragus region of the user, and at least a portion of the sound emitting portion 11 may be positioned in a baffle with the antitragus region to increase the sound path of sound emitted from the pressure relief hole 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 some embodiments, consider that when the user wears the earphone 10, if the distance between the centroid H' of the first projection and the projection of the first portion 121 of the ear hook 12 on the sagittal plane is too large, the problem of wearing instability (where the sound emitting portion 11 and the ear hook 12 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, not only the relative positions of the sound emitting portion 11 and the concha cavity and the ear opening of the user may be affected, but also the problem that the sound emitting portion 11 or the ear hook 12 presses the ear, resulting in poor wearing comfort may occur. Based on this, to avoid the foregoing problems, in some embodiments, the centroid H' of the first projection may be in the range of 18mm-43mm from the projection of the first portion 121 of the earhook 12 onto the sagittal plane. By controlling the distance to be 18mm-43mm, the ear hook 12 can be well attached to the ear of the user, 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. 5 can be formed, so that sound output by the sound emitting part 11 can be well transmitted to the user. In some embodiments, in order to further enhance the wearing stability of the earphone 10 and to ensure the listening effect of the sound emitting portion 11 at the ear canal opening, in some embodiments, the centroid H' of the first projection may be in a range of 20mm-41mm from the projection of the first portion 121 of the ear hook 12 on the sagittal plane. In some embodiments, to further enhance the wearing stability of the earphone 10 and to ensure the listening effect of the sound emitting portion 11 at the ear canal opening, the centroid H' of the first projection may be in the range of 22mm-40.5mm from the projection of the first portion 121 of the ear hook 12 on the sagittal plane. As a specific example, the minimum distance d ₃ of the projection of the centroid H 'of the first projection onto the sagittal plane of the user and the projection of the first portion 121 of the ear hook 12 onto this sagittal plane may be 21mm and the maximum distance d ₄ of the projection of the centroid H' of the first projection onto the sagittal plane of the user and the projection of the first portion 121 of the ear hook 12 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, when the earphone 10 is in the unworn state, the projected point of the centroid of the sound emitting portion 11 at the particular reference plane remains coincident with the centroid of the projection of the sound emitting portion 11 at the particular reference plane. In some embodiments, in order to make the ear hook 12 fit well with the ear of the user to improve wearing stability of the earphone 10, while ensuring that the sound emitting portion 11 is just located in the concha cavity of the user to improve the listening effect of the sound emitting portion 11 at the ear level opening, a projection point of a centroid of the sound emitting portion 11 on a specific reference plane (i.e. a centroid of a projection of the sound emitting portion 11 on the specific reference plane) may have a distance ranging from 13mm to 38mm from a projection of the first portion 121 of the ear hook 12 on the specific reference plane. In some embodiments, to further enhance the wearing stability of the earphone 10 and to ensure the listening effect of the sound emitting portion 11 at the ear canal opening, when the earphone 10 is in the unworn state, the projection point of the centroid of the sound emitting portion 11 on the specific reference plane (i.e. the centroid of the projection of the sound emitting portion 11 on the specific reference plane) may be in a distance range of 16mm-36mm from the projection of the first portion 121 of the ear hook 12 on the specific reference plane. In some embodiments, by making the distance between the point of projection of the centroid of the sound generating portion 11 on the specific reference plane (i.e. the centroid of the projection of the sound generating portion 11 on the specific reference plane) and the projection of the first portion 121 of the ear hook 12 on the specific reference plane slightly smaller than the wearing state in the unworn state, the ear hook 12 of the earphone 10 can generate a certain clamping force to the ear of the user when in the wearing 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 specific reference plane may be a sagittal plane, in which case the centroid of the projection of the sound generating portion 11 on the sagittal plane may be analogous to the centroid of the projection of the sound generating portion on the specific reference plane in the unworn state. 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 plane may be an ear-hook plane S ₁. The ear hook structure is an arc structure, and the ear hook plane S ₁ is a plane formed by three points protruding outwards on the ear hook 12, i.e. a plane for supporting the ear hook 12 when the ear hook 12 is freely placed (i.e. is not acted by external force). For example, when the earhook 12 is freely placed on a horizontal surface that supports the earhook 12, the horizontal surface 12 may be considered as an earhook plane S ₁. In other embodiments, the ear-hook plane S ₁ may also refer to a plane formed by a bisector that bisects or substantially bisects the ear-hook 12 along its length extension. While the ear-hook plane S ₁ is angled with respect to the sagittal plane in the worn state, the ear-hook 12 may be considered to be approximately conforming to the head, and therefore the angle is small, and for ease of calculation and description, it is also possible to use the ear-hook plane S ₁ as a specific reference plane instead of the sagittal plane.

In some embodiments, the angle α ₄ between the line between the extreme point N of the ear hook and the centroid H of the sound generating portion 11 and the plane S ₁ (also referred to as the ear hook plane S ₁) in which the ear hook 12 lies can affect the extent to which the sound generating portion 11 is inserted into the user' S concha cavity in the worn state of the earphone 10. If the included angle α ₄ between the connection line between the ear-hook extreme point N and the centroid point H of the sound generating portion 11 and the plane of the ear hook 12 is too small, the sound generating portion 11 may be too deep into the concha cavity, and the position of the sound generating portion 11 may be too close to the ear canal opening of the user, at this time, the ear canal opening is blocked to a certain extent, so that the communication between the ear canal opening and the external environment cannot be realized, and the design of the earphone 10 itself cannot be achieved. If the included angle α ₄ between the line between the extreme point N of the ear hook and the centroid point H of the sound generating portion 11 and the plane of the ear hook 12 is too large, the sound generating portion 11 may extend into the concha cavity (for example, the gap between the sound generating portion 11 and the concha cavity is too large), so as to affect the listening effect of the sound generating portion 11. The included angle between the line NH between the extreme point N of the ear hook and the centroid H of the sound generating portion 11 and the ear hook plane S ₁ refers to a smaller included angle formed by the intersection of the line NH and the ear hook plane S ₁.

Fig. 10 is an exemplary schematic diagram of the location of the centroid of a sound emitting portion according to some embodiments of the present description. Referring to fig. 10, in some embodiments, in order to make the earphone 10 have a better listening effect, an angle α ₄ between a line HN between an ear-hook extreme point N and a centroid point H of the sound generating portion 11 and an ear-hook plane S ₁ may range from 10 ° to 18 °. The plane S ₁ of the ear hook may be determined by the upper vertex K on the ear hook 12, the extreme point N of the ear hook, the point Q on the ear hook 12, and the point P on the ear hook 12, as shown in fig. 3. In some embodiments, to further avoid the sound emitting portion 11 being too close to the user' S ear canal opening, the angle α ₄ between the line HN between the ear-hook extreme point N and the centroid point H of the sound emitting portion 11 and the ear-hook plane S ₁ may range from 12 ° to 16 °. In some embodiments, to further enhance the listening effect, the angle α ₄ between the line HN between the ear-hook extreme point N and the centroid point H of the sound emitting portion 11 and the ear-hook plane S ₁ may range from 13 ° to 14 °.

Fig. 11A is a schematic view illustrating exemplary positions of an inner side surface of a sound emitting portion and an ear-hook plane according to some embodiments of the present disclosure, and fig. 11B is a schematic view illustrating a structure of an earphone according to some embodiments of the present disclosure in an unworn state.

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 10, a part of the area of the ear hook 12 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 included angle is formed between the sounding part 11 and the ear hook plane S ₁. The angle may 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 plane corresponding to the sound generating portion 11 may be a plane in which the inner side IS or the outer side OS of the sound generating portion 11 IS located. In some embodiments, when the inner side IS and the outer side OS of the sound generating portion 11 are curved surfaces, the corresponding plane may refer to a tangent plane of the curved surface at the center position or a plane approximately coinciding with a curve defined by an edge contour of the curved surface. In some embodiments, taking a plane in which the inner side IS of the sound generating portion 11 IS located as an example, an angle θ formed between the inner side IS and the ear-hook plane S ₁ IS formed. In some embodiments, the included angle θ may be measured by an exemplary method of respectively obtaining a projection of the inner side surface IS of the sound generating portion 11 on the XY plane and a projection of the ear hook 12 on the XY plane along the short axis direction Z of the sound generating portion 11, selecting two points, which are most protruded on one side of the projection of the inner side surface IS of the sound generating portion 11 near (or far from) the X-Y plane, as a first straight line, and when the projection of the inner side surface IS of the sound generating portion 11 on the XY plane IS a straight line, the included angle between the first straight line and the projection of the inner side surface IS on the XY plane IS the included angle θ. When the projection of the inner side IS of the sound generating portion 11 on the XY plane IS a curve, the angle between the first straight line and the long axis direction Y can be regarded as approximately 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 10, and the difference is that the above method may be directly used to measure the sound emitting portion in the unworn state, and the above method may be used to measure the sound emitting portion when the earphone 10 is worn on the model of the human head or the model of the ear in the wearing state.

In some embodiments, the angle θ between the inner side IS or the outer side OS of the sound generating portion 11 and the ear-hanging plane S ₁ also affects the insertion of the sound generating portion 11 into the concha cavity. Too large included angle θ may cause too much portion of the free end FE of the sound generating portion 11 extending into the concha cavity, and the fixed end CE of the sound generating portion 11 connected to the ear hook 12 is far away from the concha cavity, so that an effective cavity-like body cannot be formed; too small an angle θ may result in too little free end FE of sound generating portion 11 extending into the concha cavity, resulting in too large a gap with the concha cavity, and the fixed end CE of sound generating portion 11 connected to ear hook 12 may press the tragus of the user.

As shown in fig. 11A and 11B, in some embodiments, in order to ensure that a user can have a better listening effect while wearing the earphone 10, and ensure stability when wearing, when the earphone 10 IS in a wearing state, an included angle θ between an inner side IS or an outer side OS of the sound generating portion 11 and the ear-hanging plane S ₁ may be 15 ° -25 °. In some embodiments, to further enhance the listening effect, the angle θ between the inner side IS or the outer side OS of the sound generating part 11 and the ear-hanging plane S ₁ may be 17 ° -23 ° when the earphone 10 IS in the worn state. In some embodiments, in order to make the cavity-like structure formed by the sound generating portion 11 and the concha cavity have a more suitable volume and opening size/number, when the earphone 10 IS in the wearing state, the included angle θ between the inner side IS or the outer side OS of the sound generating portion 11 and the ear-hanging plane S ₁ may be 19 ° -20 °.

Because the ear hook 12 has elasticity, the included angle θ between the inner side IS or the outer side OS of the sound generating portion 11 and the ear hook plane S ₁ may change to a certain extent in the worn state and the unworn state, for example, the included angle θ in the unworn state IS smaller than the included angle θ in the worn state. In some embodiments, when the earphone 10 IS in the unworn state, the included angle θ between the inner side IS or the outer side OS of the sound emitting portion 11 and the ear-hook plane S ₁ may be 15 ° -23 °, so that the ear-hook 12 of the earphone 10 can generate a certain clamping force on the ear 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 without affecting the wearing experience of the user. In some embodiments, to further enhance the listening effect, the angle θ between the inner side IS or outer side OS of the sound emitting portion 11 and the supra-aural plane S ₁ in the unworn state may range from 16.5 ° to 21 °. In some embodiments, in order to provide a more suitable volume and opening size/number of cavity-like structure formed by the sound emitting part 11 and the concha cavity, the sound emitting part 11 may have an inclination angle in the range of 18 ° -20 ° with respect to the supra-aural plane 12A in the unworn state.

In some embodiments, in the unworn state, the maximum distance between the ear hook 12 and the inner side surface IS of the sound generating portion 11 IS designed, so that the ear of the user can be well accommodated between the ear hook 12 and the sound generating portion 11 in the wearing state of the earphone 10, so that the ear hook 12 can be well adapted to the ear of the user, and wearing comfort and stability of the earphone 10 are improved. If the maximum vertical distance between the ear hook 12 and the inner side surface IS of the sound emitting portion 11 IS too large, the wearing stability of the earphone 10 IS affected. If the maximum vertical distance between the ear hook 12 and the inner side IS of the sound emitting portion 11 IS too small, the adjustability of the earphone 10 IS affected.

Fig. 12 is a schematic illustration of exemplary locations of points on an earhook that are furthest from the inside of the sound emitting portion at a perpendicular distance, according to some embodiments of the present description. As shown in fig. 12, in some embodiments, the point on the earhook 12 furthest from the inner side IS of the sound emitting portion 11 IS point G in the XY plane. That IS, in the X direction, the point on the ear hook 12 furthest from the inner side IS the point G. In some embodiments, the distance between a point on the earhook 12 and the medial side IS the distance of the point on the earhook 12 from the point on the medial side IS projected by the point in a direction perpendicular to the medial side IS. In some embodiments, in order to provide the earphone 10 with better wearing stability and adjustability, the distance between the point G and the inner side IS of the sound generating part 11 may be 6mm-9mm. That IS, the furthest distance between the ear hook 12 and the inner side face IS of the sound emitting portion 11 may be 6mm to 9mm. In some embodiments, to further enhance wear stability, the distance between point G and the inside face IS of sound generating portion 11 may be 7mm-8mm. In some embodiments, the distance between the point G and the inner side IS of the sound emitting part 11 may be 7.5mm-7.9mm in order to further enhance the adjustability.

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 of the transducer of the sound emitting portion 11 and the housing of the sound emitting portion 11 are too small, and the vibration amplitude of the vibration is limited, so that a large sound volume cannot be provided. When the size of the sounding part 11 in the thickness direction X is excessively large, the free end FE of the sounding part 11 cannot completely abut against the edge of the concha cavity in the wearing state, so that the earphone 10 is easily detached. An angle θ IS formed between the inner side IS of the sound emitting portion 11 and the ear-hanging plane S ₁, and a distance between a point of the sound emitting portion 11 farthest from the ear-hanging plane S ₁ and the ear-hanging plane S ₁ IS related to a dimension of the sound emitting portion 11 in the thickness direction X. In some embodiments, because the sound emitting portion 11 is disposed obliquely with respect to the ear-hook plane S ₁, the point on the sound emitting portion 11 furthest from the ear-hook plane S ₁ may be referred to as the intersection point I of the fixed end CE, the lower side LS, and the outer side OS of the sound emitting portion 11, which are connected to the ear-hook 12, as shown in fig. 3. Further, the extent to which the sound emitting portion 11 protrudes into the concha cavity 11 can be determined by the distance between the point I on the sound emitting portion 11 closest to the ear-hanging plane S ₁ and the ear-hanging plane S ₁. The point on the sound emitting portion 11 closest to the ear-hook plane S ₁ may be referred to as the intersection point J of the free end FE, the upper side surface US, and the inner side surface IS of the sound emitting portion 11, as shown in fig. 11B. By setting the distance between the point J closest to the ear-hanging plane S ₁ on the sound generating portion 11 and the ear-hanging plane S ₁ within a proper range, it is possible to ensure that the size of the gap formed between the sound generating portion 11 and the concha cavity is small while ensuring wearing comfort of the user. In some embodiments, 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 10 is in a wearing state, a distance between a point I on the sound generating portion 11 farthest from the ear-hanging plane S ₁ and the ear-hanging plane S ₁ may be 11.2mm-16.8mm, and a distance between a point J on the sound generating portion 11 closest to the ear-hanging plane S ₁ and the ear-hanging plane S ₁ may be 3mm-5.5mm. In some embodiments, to further enhance the acoustic output effect of the sound generating portion 11 and the wearing stability and comfort of the earphone 10, the point I on the sound generating portion 11 furthest from the ear-hanging plane S ₁ may be 12mm-15.6mm from the ear-hanging plane S ₁, and the point J on the sound generating portion 11 closest to the ear-hanging plane S ₁ may be 3.8mm-5mm from the ear-hanging plane S ₁. In some embodiments, to further enhance the acoustic output effect of the sound generating portion 11 and the wearing stability and comfort of the earphone 10, the point I on the sound generating portion 11 furthest from the ear-hanging plane S ₁ may be 13mm-15mm from the ear-hanging plane S ₁, and the point J on the sound generating portion 11 closest to the ear-hanging plane S ₁ may be 4mm-5mm from the ear-hanging plane S ₁.

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. 5, 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 inclination of the sound emitting portion 11 in the horizontal direction in addition to the long axis direction Y (projection of the upper side surface US or the lower side surface LS on the sagittal plane) of the sound emitting portion 11, for example, when the size of the sound emitting portion 11 (particularly, the size in the short axis direction Z shown in fig. 13) is too small, 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 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. 13) 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.

Fig. 13 is an exemplary wearing schematic diagram of headphones according to further embodiments of the present description. As shown in fig. 13, in some embodiments, the midpoint of the projection of the superior and inferior sides US, LS of the sound emitting portion 11 on the sagittal plane from the highest point of the second projection may reflect the size of the sound emitting portion 11 in the short axis direction Z (the direction indicated by the arrow Z shown in fig. 13) and the position of the sound emitting portion 11 relative to the concha chamber. 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 d ₅ between the midpoint C ₁ of the projection of the upper side US of the sound generating part 11 on the sagittal plane and the highest point a ₁ of the second projection ranges from 20mm to 38mm, and the distance d ₆ between the midpoint C ₂ of the projection of the lower side LS of the sound generating part 11 on the sagittal plane and the highest point a ₁ of the second projection ranges from 32mm to 57mm. In some embodiments, to further avoid the earphone 10 blocking the ear canal opening of the user, the listening effect of the earphone 10 is improved, the distance d ₅ between the midpoint C ₁ of the projection of the upper side US of the sound generating part 11 on the sagittal plane and the highest point a ₁ of the second projection ranges from 24mm to 36mm, and the distance d ₆ between the midpoint C ₂ of the projection of the lower side LS of the sound generating part 11 on the sagittal plane and the highest point a ₁ of the second projection ranges from 36mm to 54mm. In some embodiments, to further avoid the earphone 10 blocking the ear canal opening of the user, the listening effect of the earphone 10 is improved, the distance d ₅ between the midpoint C ₁ of the projection of the upper side US of the sound generating part 11 on the sagittal plane and the highest point a ₁ of the second projection ranges from 27mm to 34mm, and the distance d ₆ between the midpoint C ₂ of the projection of the lower side LS of the sound generating part 11 on the sagittal plane and the highest point a ₁ of the second projection ranges from 38mm to 50mm. It should be noted that, when the projection of the upper side surface US of the sounding part 11 on the sagittal plane is a curve or a broken line, the midpoint C ₁ of the projection of the upper side surface US of the sounding part 11 on the sagittal plane may be selected by the following exemplary method, two points with the greatest distance along the long axis direction Y of the projection of the upper side surface US on the sagittal plane 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 side surface US of the sounding part 11 on the sagittal plane. In some alternative embodiments, the point of the projection of the upper side US 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 C ₁ of the projection of the upper side US of the sound generating portion 11 on the sagittal plane. The midpoint of the projection of the lower surface LS of the sound generating portion 11 on the sagittal plane is selected in the same manner as described above, and for example, a point having the largest distance from the highest point of the second projection in the projection of the lower surface LS on the sagittal plane may be selected as the midpoint C ₂ of the projection of the lower surface LS of the sound generating portion 11 on the sagittal plane.

In some embodiments, the distance between the midpoint of the projection of the superior and inferior sides US, LS of the sound emitting portion 11 on the sagittal plane and the projection point K' of the supra-aural vertex K on the sagittal plane may reflect the dimension of the sound emitting portion 11 in the short axis direction Z (the direction indicated by the arrow Z shown in FIG. 3). 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 d ₇ between the midpoint C ₁ of the projection of the upper side US of the sound generating portion 11 on the sagittal plane and the projection point K ' of the upper peak K of the ear hook on the sagittal plane ranges from 17mm to 36mm, and the distance d ₈ between the midpoint C ₂ of the projection of the lower side LS of the sound generating portion 11 on the sagittal plane and the projection point K ' of the upper peak K of the ear hook on the sagittal plane ranges from 28mm to 52mm. In some embodiments, to further avoid the earphone 10 from blocking the ear canal opening of the user and to enhance the listening effect of the earphone 10, the distance d ₇ between the midpoint C ₁ of the projection of the upper side surface US of the sound generating part 11 on the sagittal plane and the projection point K 'of the upper peak K of the ear hook on the sagittal plane is 21mm-32mm, and the distance d ₈ between the midpoint C ₂ of the projection of the lower side surface LS of the sound generating part 11 on the sagittal plane and the projection point K' of the upper peak K of the ear hook on the sagittal plane is 32mm-48mm. In some embodiments, to further avoid the earphone 10 from blocking the ear canal opening of the user and to enhance the listening effect of the earphone 10, the distance d ₇ between the midpoint C ₁ of the projection of the upper side surface US of the sound generating part 11 on the sagittal plane and the projection point K 'of the upper peak K of the ear hook on the sagittal plane is in the range of 24mm-30mm, and the distance d ₈ between the midpoint C ₂ of the projection of the lower side surface LS of the sound generating part 11 on the sagittal plane and the projection point K' of the upper peak K of the ear hook on the sagittal plane is in the range of 35mm-45mm.

Fig. 14A-14C are schematic diagrams of 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 free end FE of the sound emitting portion 11 from the edge of the concha cavity, in addition to the angle of the long axis direction Y of the projection of the sound emitting portion 11 on the sagittal plane of the user with the horizontal direction, the size of the sound emitting portion 11 (for example, the size along the short axis direction Z shown in fig. 3). Specifically, the fixed end CE of the sound emitting portion 11 is connected to the second portion 122 of the ear hook 12, and when the user wears the ear hook, the distance between the free end FE of the sound emitting portion 11 and the fixed end CE may reflect the dimension of the sound emitting portion 11 in the long axis direction (the direction indicated by the arrow Y shown in fig. 3), so that the position of the free end FE of the sound emitting portion 11 relative to the concha cavity affects the area of the sound emitting portion 11 covering the concha cavity, thereby affecting the size of the gap formed between the contours of the sound emitting portion 11 and the concha cavity, and further affecting the volume of sound at the user's level. The projected distance of the midpoint C ₃ of the projection of the free end FE of the sound emitting portion 11 onto the sagittal plane (as shown in fig. 14A-14C) from the edge of the concha cavity onto the sagittal plane may reflect the position of the free end FE of the sound emitting portion 11 relative to the concha cavity and the extent to which the sound emitting portion 11 covers the user's concha cavity. 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 C ₃ of the projection of the free 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 free end FE on the sagittal plane 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 the midpoint C ₃ of the projection of the free end FE of the sound generating portion 11 on the sagittal plane. In some embodiments, when the free 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 of the free end FE of the sound generating portion 11 may be selected as the midpoint C ₃ of the projection of the free end FE of the sound generating portion 11 on the sagittal plane.

As shown in fig. 14A, when the sounding part 11 is not abutted against the edge of the concha cavity 102, the free end FE of the sounding part 11 is located in the concha cavity 102, that is, the midpoint C ₃ of the projection of the free end FE of the sounding part 11 on the sagittal plane does not overlap with the projection of the edge of the concha cavity 102 on the sagittal plane. As shown in fig. 14B, the sound emitting portion 11 of the earphone 10 extends into the concha chamber 102, and the free end FE of the sound emitting portion 11 abuts against the edge of the concha chamber 102. It should be noted that, in some embodiments, when the free end FE of the sound generating portion 11 abuts against the edge of the concha cavity 102, the midpoint C ₃ of the projection of the free end FE of the sound generating portion 11 on the sagittal plane overlaps with the projection of the edge of the concha cavity 102 on the sagittal plane. In some embodiments, the midpoint C ₃ of the projection of the free end FE of the sound emitting portion 11 onto the sagittal plane may not overlap with the projection of the edge of the concha cavity 102 onto the sagittal plane when the free end FE of the sound emitting portion 11 abuts against the edge of the concha cavity 102. For example, 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 C ₃ of the projection of the free 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 C ₃ of the projection of the free 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 disclosure, when the free end FE of the sound generating portion 11 is located in the concha cavity 102, the distance between the free end FE of the sound generating portion 11 and the projection of the midpoint C ₃ of the projection on the sagittal plane and the projection of the edge of the concha cavity 102 on the sagittal plane is within a specific range (for example, not more than 6 mm), and the free end FE of the sound generating portion 11 is considered to abut against the edge of the concha cavity 102. As shown in fig. 14C, the sound emitting portion 11 of the earphone 10 covers the concha cavity, and the free end 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. 14A to 14C, when the free end FE of the sounding part 11 is located in the edge of the concha cavity 102, if the distance between the midpoint C ₃ of the projection of the free end FE of the sounding part 11 on the sagittal plane and the projection of the edge of the concha cavity 102 on the sagittal plane is too small, the area of the sounding part 11 covering the concha cavity 102 is too small, and the gap size formed between the sounding part 11 and the edge of the concha cavity is large, which affects the volume of listening at the user's meatus. When the free end FE of the sounding part is located at a position between the projection of the middle point C ₃ of the projection on the sagittal plane and the projection of the inner contour 1014 of the auricle on the sagittal plane of the concha cavity 102, if the projection of the middle point C ₃ of the projection of the free end FE of the sounding part 11 on the sagittal plane and the projection of the edge of the concha cavity 102 on the sagittal plane is too large, the free end FE of the sounding part 11 interferes with the auricle and cannot increase the proportion of the sounding part 11 covering the concha cavity 102, and when the user wears the device, the free end FE of the sounding part 11 cannot limit the sounding part 11 if not located in the concha cavity 102, and the edge of the concha cavity 102 is easy to fall off. In addition, the increase in size of the sound emitting part 11 in a certain direction increases its own weight, affecting the comfort of wearing and portability of the user. 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 C ₃ of the projection of the free 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. In some embodiments, to further enhance the listening effect, and wearing stability and comfort of the earphone 10, the distance between the midpoint C ₃ of the projection of the free 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 no more than 13mm. In some embodiments, to further enhance the listening effect, and wearing stability and comfort of the earphone 10, the distance between the midpoint C ₃ of the projection of the free 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 no more than 8mm. It should be noted that, in some embodiments, the distance between the midpoint C ₃ of the projection of the free 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 C ₃ of the projection of the free 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 C ₃ of the projection of the free end FE of the sounding 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 along the sagittal axis. In addition, in a specific wearing scenario, it may also be that, in the projection of the free end FE of the sound generating portion 11 on the sagittal plane, other points except for the midpoint C ₃ abut against the edge of the concha cavity, where the distance between the midpoint C ₃ of the projection of the free 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, in order to further enhance the listening effect, and wearing stability and comfort of the earphone 10, the distance between the midpoint C ₃ of the projection of the free 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-16mm. In some embodiments, to further enhance the listening effect, and wearing stability and comfort of the earphone 10, the distance between the midpoint C ₃ of the projection of the free 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.

In some embodiments, by designing the features (such as extreme points, etc.) of the first curve L ₁ included in the inner contour of the projection of the ear hook 12 on the sagittal plane of the user, the shape and size of the ear hook 12 can be determined, so that, on one hand, the position of the sounding part 11 relative to the ear of the user in the wearing state can be adjusted, the listening effect of the earphone 10 is improved, and on the other hand, the fitness between the ear hook 12 and the ear of the user can be improved, and the wearing stability and comfort of the earphone 10 are improved.

Fig. 15 is a schematic diagram of an exemplary fitted function curve of a first curve shown in accordance with some embodiments of the present description. As shown in fig. 4 and 15, in some embodiments, the extreme point N' of the first curve L ₁ may be determined by means of curve fitting. It should be noted that, if the position of the origin of coordinates of the xoy coordinate system is changed (for example, the position of the x axis and/or the y axis is changed), the fitting function relation of the first curve L ₁ is correspondingly changed. By way of example only, if the x-axis of the xoy coordinate system is set at the long axis position of the projection of the sound generating unit 11 (long axis is the line connecting the two end points having the maximum extension in the shape of the projection of the sound generating unit 11), and the y-axis is set 13mm behind the projection point K' of the upper vertex K, then fitting the first curve L ₁ by a one-element fourth-order polynomial function in this xoy coordinate system can obtain an exemplary fitting functional relation of the first curve L ₁:

y= -0.0003059 x 4-0.002301 x 3-0.004005 x 2+0.07309 x +23.39 (relationship 1)

In some embodiments, to allow the image of the fitted function to include the first curve L ₁, the range of values of the argument x of the fitted function may be larger to include the two end points (points P and Q) of the first curve L ₁, so that the fitted function may fully characterize the first curve L ₁. In some embodiments, the value of the argument x of the fitting function relationship (i.e., relationship 1) ranges from [ -20, 15], i.e., -20.ltoreq.x.ltoreq.15. Further, in order to reduce the portion of the image of the fitting function relation (i.e., relation 1) that does not correspond to the first curve L1, so that the fitting function relation can accurately feature the first curve L ₁, the value range of the argument x of the fitting function relation (i.e., relation 1) is [ -18, 12], i.e., -18+.x+.ltoreq.12.

In some embodiments, the first portion 121 and the second portion 122 of the ear hook 12 may take the point Q as a demarcation point, and the right end point of the range of values of the argument x of the fitting function relation (i.e., relation 1) may be the corresponding value of the projection point Q' of the point Q on the sagittal plane of the user on the x-axis. By designing the first curve L ₁, the location of the point Q can be determined, thereby adjusting the demarcation point of the first portion 121 and the second portion 122. Since the second portion 122 of the ear hook extends to the side of the auricle away from the head and is connected with the sound generating portion 11, by adjusting the boundary point between the first portion 121 and the second portion 122, the position of the sound generating portion 11 relative to the ear hook 12 can be changed, and the position of the sound generating portion 11 relative to the ear in the wearing state can be changed.

The abscissa of the extremum point N ' of the first curve L ₁ in the xoy coordinate system (for the determination method of the extremum point, please refer to the subsequent related content) can be determined by calculating the independent variable x ₀ corresponding to the first derivative y ' =0 of the relation 1, and then substituting x ₀ into the relation 1 to determine the coordinates of the extremum point N ' in the coordinate system xoy. In the above functional relation 1, the coordinates of the extreme point N' are (2.3544, 23.5005).

Note that, the functional relation (e.g., relation 1) of the first curve L ₁ obtained by polynomial fitting is an approximate expression of the first curve L ₁, and when the number of sampling points fitting the functional relation is large (e.g., greater than 10) and the sampling points are uniformly distributed, the curve represented by the functional relation may be regarded as the first curve L ₁. The fitted functional relation is only an example, and is mainly used to describe the characteristics (including extreme points, inflection points, first derivatives, second derivatives, etc.) of the first curve L ₁, the specific functional relation (for example, relation 1) of the first curve L ₁ is related to the selection of the origin o of the coordinate system xoy, and the functional relation is different when the origin o is different, but in the case that the directions of the horizontal axis (x axis) and the vertical axis (y axis) of the coordinate system are unchanged, the relative positions of the curve characteristics such as the extreme points, inflection points, etc. of the first curve L ₁ on the first curve L ₁ are determined, and the properties of the first derivatives and the second derivatives of the first curve L ₁ are also determined and cannot be changed with the position of the origin o of the coordinate system xoy. The present description is non-limiting with respect to the choice of origin o of the coordinate system xoy fitting the first curve L ₁ and the functional expression of the first curve L ₁. For example, in order to more conveniently determine the positional relationship between the extreme point and the upper vertex, the y-axis of the coordinate system xoy may be set to be the projection point K' beyond the upper vertex K, and the functional expression of the first curve L ₁ may also be changed accordingly.

In some embodiments, the first derivative y' and the second derivative y of the functional relation y of the first curve L ₁ may be further calculated. And calculating to obtain an abscissa x ₀ corresponding to the first derivative y ' =0, and judging the positive and negative of the value of the second derivative y ' corresponding to x ₀ to judge whether the extreme point N ' is a maximum point or a minimum point. If the value of the second derivative y' corresponding to x ₀ is larger than 0, the corresponding coordinate point (x ₀,y₀) is a minimum point; if the value of the second derivative y″ corresponding to x ₀ is smaller than 0, the corresponding coordinate point (x ₀,y₀) is the maximum point. In some embodiments, the extreme point N' of the first curve L ₁ is the maximum point.

In some embodiments, the extremum point N 'of the first curve L ₁ may be determined by other manners, for example, determining the magnitude of the function values y and y ₀ corresponding to different values in the region around x ₀, determining the difference in the positive and negative polarities of the value y' of the first derivative corresponding to different values in the region around x ₀, and the like, which is not limited in this specification.

In some embodiments, the extreme point N 'of the first curve L ₁ may be determined by other methods instead of determining the extreme point N' of the first curve L ₁ by fitting a functional relation of the first curve L ₁. For example, when the earphone 10 is projected on the sagittal plane of the user (the projection may be obtained by photographing the sagittal plane of the user) and moves from the point P ' of the first curve L ₁ to the point Q ' along the longitudinal direction Y at a scale perpendicular to the longitudinal direction Y, the intersection point of the first curve L ₁ and the scale has a maximum value on the scale during the movement, the intersection point is the extreme point N ' of the first curve L ₁.

FIG. 16 is a schematic diagram of an exemplary first derivative curve of a fitted curve according to some embodiments of the present description. As shown in fig. 16, in some embodiments, for the first curve L ₁, it has a first derivative:

y' = -0.0012236 x 3-0.006903 x 2-0.00801 x+0.07309 (relationship 2)

In some embodiments, the first derivative of the first curve L ₁ is continuous.

In some embodiments, the first derivative of the first curve L ₁ (i.e., relation 2) has a zero point (point D ₁), i.e., y' =0 corresponds to a solution, corresponding to the abscissa of point D ₁. In some embodiments, the coordinates of point D ₁ are determined to be (2.3544,0) according to relation 2. As can be seen from the relation 1 in which the abscissa of the point D ₁ is taken into the first curve L ₁, the point of the first curve L ₁ corresponding to the abscissa of the point D ₁ is the maximum point of the first curve L ₁ in the xoy coordinate system, and at the same time, the point is also the maximum point of the first curve L ₁, which can be referred to as the extreme point N' of the first curve L ₁.

In some embodiments, the first derivative of the first curve L ₁ has an inflection point within the first rectangular coordinate system xoy. In some embodiments, the number of inflection points of the first derivative of the first curve L ₁ is one, point D ₂, within the first rectangular coordinate system xoy. As shown in fig. 16, the image curve of the first derivative is a concave function to the left of point D ₂; to the right of point D ₂, the image curve of the first derivative is a convex function. Point D ₂ is the inflection point of the first derivative as the point of change in the convexity of the image curve of the first derivative.

In some embodiments, in the first rectangular coordinate system xoy, the inflection point both side portions of the first derivative of the first curve L ₁ have extreme points (point D ₃ and point D ₄), respectively, as shown in fig. 16. The first derivative of the first curve L ₁ is located above the point D ₃ on both the left and right sides of the vicinity of the point D ₃, that is, in the region on both the left and right sides of the vicinity of the point D ₃, the first derivative function value corresponding to the point D ₃ is the smallest, and the point D ₃ is the minimum point of the first derivative. The first derivative of the first curve L ₁ is located below the point D ₄ on both the left and right sides of the vicinity of the point D ₄, that is, in the region on both the left and right sides of the vicinity of the point D ₄, the first derivative function value corresponding to the point D ₄ is the maximum value point of the first derivative, and the point D ₄ is the maximum value point of the first derivative.

In some embodiments, the extreme point of the first derivative of the first curve L ₁ may also be determined according to the second derivative and the third derivative of the first curve L ₁, and the method for determining the extreme point of the first curve L ₁ may be referred to herein, which is not described in detail.

In some embodiments, the coordinates of point D ₃ can be determined to be (-3.0442,0.0680) and the coordinates of point D ₄ can be (-0.7168,0.0757) according to relation 2.

FIG. 17 is a schematic diagram of an exemplary second derivative curve of a fitted curve according to some embodiments of the present description. As shown in fig. 17, in some embodiments, for the first curve L ₁, it has a second derivative:

y "= -0.0036708 x 2-0.013806 x-0.00801 (relationship 3)

In some embodiments, the second derivative of the first curve L ₁ is continuous.

In some embodiments, the second derivative of the first curve L ₁ has a maximum point, point E ₁, within the first rectangular coordinate system xoy. As shown in fig. 17, the second derivative of the fitted curve L ₂ is located below the point E ₁ on both the left and right sides around the point E ₁, that is, in the region on both the left and right sides around the point E ₁, the second derivative function value corresponding to the point E ₁ is the maximum value point of the second derivative, and the point E ₁ is the maximum value point of the second derivative.

In some embodiments, the second derivative of the first curve L ₁ has two zeros (point E ₂ and point E ₃), and the abscissa of point E ₂ corresponds to the abscissa of the extreme point D ₃ of the first derivative, x= -0.30442; the abscissa of the point E ₃ corresponds to the abscissa of the extreme point D ₄ of the first derivative, which is x= -0.7168.

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.

Furthermore, the order in which the elements and sequences are presented, the use of numerical letters, or other designations are used in the application is not intended to limit the sequence of the processes and methods unless specifically recited in the claims. While certain presently useful inventive embodiments have been discussed in the foregoing disclosure, by way of example, it is to be understood that such details are merely illustrative and that the appended claims are not limited to the disclosed embodiments, but, on the contrary, are intended to cover all modifications and equivalent arrangements included within the spirit and scope of the embodiments of the application.

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.

In some embodiments, numbers describing the components, number of attributes are used, it being understood that such numbers being used in the description of embodiments are modified in some examples by the modifier "about," approximately, "or" substantially. Unless otherwise indicated, "about," "approximately," or "substantially" indicate that the number allows for a 20% variation. Accordingly, in some embodiments, numerical parameters set forth in the specification and claims are approximations that may vary depending upon the desired properties sought to be obtained by the individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and employ a method for preserving the general number of digits. Although the numerical ranges and parameters set forth herein are approximations in some embodiments for use in determining the breadth of the range, in particular embodiments, the numerical values set forth herein are as precisely as possible.

Each patent, patent application publication, and other material, such as articles, books, specifications, publications, documents, etc., cited herein is hereby incorporated by reference in its entirety. Except for the application history file that is inconsistent or conflicting with this disclosure, the file (currently or later attached to this disclosure) that limits the broadest scope of the claims of this disclosure is also excluded. It is noted that the description, definition, and/or use of the term in the appended claims controls the description, definition, and/or use of the term in this application if there is a discrepancy or conflict between the description, definition, and/or use of the term in the appended claims.

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 (23)

1. An earphone, comprising:

a sound generating part including a transducer and a housing accommodating the transducer;

The ear hook comprises an ear hook body, wherein a first part of the ear hook body is hung between an auricle and a head of a user in a wearing state, a second part of the ear hook body is connected with the first part and extends to one side of the auricle, which is away from the head, and is connected with the sound generating part, and the sound generating part is worn near an auditory canal but not blocking the auditory canal opening; wherein,

The inner contour of the projection of the ear hook on the sagittal plane of the user comprises a first curve having extreme points in a first direction perpendicular to the long axis direction of the projection of the sound emitting portion on the sagittal plane of the user;

The extreme point is positioned at the rear side of a projection point of an upper vertex of the ear hook on a sagittal plane of the user, and the upper vertex is the highest point of the inner outline of the ear hook along a vertical axis of the user in a wearing state;

the inclination angle of the projection of the sound generating part on the sagittal plane of the user relative to the horizontal direction is in the range of 13-21 degrees.

2. The earphone according to claim 1, wherein a distance between the extreme point and a projection point of the upper vertex on a sagittal plane of the user in a long axis direction projected by the sound emitting portion is in a range of 6mm to 15mm.

3. The headset of claim 1, wherein the extreme point is in a distance range of 20mm-30mm from a projected point of a centroid of the sound emitting portion on a sagittal plane of the user.

4. The earphone of claim 1, wherein an included angle between a line of the extreme point and a projection point of a centroid of the sound emitting portion on a sagittal plane of the user and a long axis direction of projection of the sound emitting portion is in a range of 65 ° -85 °.

5. The earphone of claim 1, wherein a distance between a projection point of the upper vertex on a sagittal plane of the user and a projection point of a centroid of the sound producing portion on the sagittal plane of the user is in a range of 20mm-30mm.

6. The headset of any one of claims 1-5, wherein an angle between a line of a projection of the upper vertex onto the sagittal plane of the user and a projection of a centroid of the sound generating portion onto the sagittal plane of the user and a long axis direction of projection of the sound generating portion is between 45 ° -65 °.

7. The earphone of claim 1, wherein the sound emitting portion extends at least partially into the concha cavity, and wherein a ratio of a projection point of a centroid of the sound emitting portion on a sagittal plane of the user to a projection point of a highest point of the auricle on the sagittal plane of the user in a vertical axis direction has a first distance, and a projection of the auricle on the sagittal plane of the user in the vertical axis direction has a height of between 0.35 and 0.6;

The center of mass of the sound generating part has a second distance in the sagittal axis direction between a projection point of the user on the sagittal plane and a projection point of the terminal point of the auricle on the sagittal plane of the user, and the ratio of the second distance to the width of the auricle projected on the sagittal plane of the user in the sagittal axis direction is between 0.4 and 0.65.

8. The earphone of claim 7, wherein a projected point of a midpoint of an upper side of the sound emitting portion on a sagittal plane of the user is in a range of 24mm-36mm from a projected point of a highest point of the auricle on the sagittal plane of the user;

the distance between the projection point of the midpoint of the lower side surface of the sounding part on the sagittal plane of the user and the projection point of the highest point of the auricle on the sagittal plane of the user is 36mm-54mm.

9. The earphone according to claim 7 or 8, wherein in a wearing state, a projection point of a midpoint of an upper side surface of the sound emitting portion on a sagittal plane of the user is in a range of 21mm to 32mm from a projection point of the upper vertex on the sagittal plane of the user;

The distance between the projection point of the midpoint of the lower side surface of the sounding part on the sagittal plane of the user and the projection point of the upper vertex on the sagittal plane of the user is 32mm-48mm.

10. The earphone of claim 7 or 8, wherein a projection of a free end of the sound emitting portion onto a sagittal plane of the user is no more than 13mm from a projection of an edge of the concha cavity onto the sagittal plane of the user.

11. The earphone of claim 7 or 8, wherein a projected point of the centroid of the sound emitting portion on the sagittal plane of the user is in a distance range of 23mm-52mm from a projected contour of the auricle on the sagittal plane of the user.

12. The headset of any one of claims 1-5, wherein a projected point of a centroid of the sound emitting portion onto a sagittal plane of the user is in a range of 18mm-43mm from a projection of the first portion of the earhook onto the sagittal plane of the user.

13. The headset of any one of claims 1-5, wherein in an unworn state, a projected point of a centroid of the sound emitting portion at a particular reference plane is in a range of 13mm-38mm from a projected point of the first portion of the earhook at the particular reference plane.

14. The earphone of claim 1, wherein in the unworn state, an angle between a line between a corresponding point of the extreme point on the earhook and a centroid of the sound generating portion and a plane in which the earhook lies is in a range of 10 ° -18 °.

15. The earphone of claim 14, wherein the angle between the outer or inner side of the sound emitting portion and the plane of the ear hook in the unworn state is in the range of 15 ° -25 °.

16. The earphone of claim 14 or 15, wherein in the unworn state, a point of the earhook furthest from the inner side of the sound emitting portion is in a distance range of 6mm-9mm from the inner side of the sound emitting portion.

17. An earphone according to claim 14 or 15, wherein in the unworn state the point of the sound-generating portion furthest from the plane of the ear-hook is from 11.2mm to 16.8mm from the plane of the ear-hook.

18. The earphone of claim 1, wherein the first derivative of the first curve in a first predetermined coordinate system is continuous, a longitudinal axis of the first predetermined coordinate system is parallel to the first direction, and a transverse axis of the first predetermined coordinate system is parallel to a long axis direction of projection of the sound emitting portion.

19. The headphones of claim 18, wherein a first derivative of the first curve in the first preset coordinate system has an inflection point.

20. The earphone of claim 19, wherein the number of inflection points is one.

21. The open earphone of claim 19 or 20 wherein the inflection point side portions each have an extreme point.

22. The headset of any one of claims 18-20, wherein the second derivative of the first curve in the first preset coordinate system is continuous.

23. The headset of claim 22, wherein the second derivative of the first curve in the first predetermined coordinate system has a maximum point.