WO2020206775A1

WO2020206775A1 - Near-ear directional sound output structure, and audio glasses

Info

Publication number: WO2020206775A1
Application number: PCT/CN2019/085750
Authority: WO
Inventors: 黄海萍
Original assignee: 深圳市广扬科技有限公司; 深圳市声临其境科技有限公司
Priority date: 2019-04-12
Filing date: 2019-05-07
Publication date: 2020-10-15
Also published as: CN109862496A

Abstract

The present application relates to a near-ear directional sound output structure, and a pair of audio glasses. A near-ear directional sound output structure, comprising a mounting cavity and a sound emission device arranged in the mounting cavity, wherein the mounting cavity is provided with sound output holes; the sound output holes are in communication with the sound emission device by means of provided sound output cavities; the sound output holes comprise a first sound output hole provided near an ear, and a second sound output hole provided away from the ear; the first sound output hole is arranged near the sound emission device; and the second sound output hole is arranged away from the sound emission device, and the second sound output hole is in communication with the sound emission device by means of a provided second sound output cavity. A sound emitted from a sound emission device can form a sound field at an earhole under the action of a directional sound emission structure, and the sound emitted from the sound emission device cannot be heard in a surrounding environment outside an ear due to an interference cancellation effect, thereby achieving the function of directional sound emission. According to the pair of audio glasses, by means of the directional effect of a directional sound output structure, insofar as the power of a sound emission device is unchanged, a sound reaching an ear of a human body is enhanced while sounds propagated to other places are attenuated.

Description

Directional sound output structure near ear and audio glasses

[0001] This application is based on a Chinese patent application with an application number of 201910296023.4 and a filing date of April 12, 2019, and claims its priority. The entire content of the application is hereby incorporated into this application as a whole.

[0002] Technical Field

[0003] This application relates to audio equipment, and more specifically to a near-ear directional sound output structure and its audio glasses

[0004] Background Technology

[0005] Commonly used audio equipment, when the equipment is used, the sound has no directionality and radiates from the center to the surroundings. Except for the reflector, it basically radiates in the form of rays. In order to achieve a small range of use, the volume can only be reduced, such as earphones. After wearing the earphones, the ambient sound cannot be heard (the external sound is blocked). If the earphones are worn for a long time, the ears will feel uncomfortable. If worn for a long time, the ears and hearing will be damaged. On the other hand, the bone conduction earphone transmits sound directly to the eardrum through the skull, which may cause discomfort such as itching for the first time wearer and impaired sound effect. It can only be used for special occasions.

[0006] The Chinese patent "A New Type of Glasses" discloses a new type of glasses, including a spectacle frame, temples hingedly arranged on both sides of the spectacle frame, a circuit board, a Bluetooth chip, a microphone radio chip, an audio driver chip, and a speaker And a battery, wherein the temple includes a first shell and a second shell that are snap-connected, the first shell has a mounting cavity, the circuit board, the Bluetooth chip, the microphone radio chip, The audio driver chip, the speaker, and the battery are respectively fixedly arranged in the mounting cavity, and a plurality of sound outlets are opened on the lower side of the first housing near the speaker; and the circuit board is provided with Switch button, the switch button penetrates the lower side of the first housing; the Bluetooth chip, the microphone radio chip and the audio driver chip are fixedly arranged on the circuit board, the speaker and the speaker The batteries are respectively electrically connected with the circuit board; the circuit board is provided with a charging contact, and the charging contact penetrates through the lower side of the first housing.

[0007] The above-mentioned patents only install a circuit board, a Bluetooth chip, a microphone radio chip, an audio driver chip, a speaker, and a battery on the temples, and a sound hole is provided near the speaker. The sound from the speakers on the temples is only transmitted through the sound hole, and the sound effect is not designed. The sound will follow The sound hole emits to the surroundings, there is no directionality, the sound effect is poor, and the experience is affected.

[0008] Application content

[0009] The purpose of the present application is to overcome the defects of the prior art and provide a directional sound output structure near the ear and audio glasses.

[0010] In order to achieve the above purpose, the application adopts the following technical solutions:

[0011] A directional sound output structure close to the ear, comprising a mounting cavity and a sound generator arranged in the mounting cavity; the mounting cavity is provided with a plurality of sound holes; the sound holes pass through the sound cavity provided Connect with the speaker;

[0012] The sound hole includes a first sound hole arranged close to the ear, and a second sound hole arranged far from the ear

The first sound hole is arranged close to the sounder, and the second sound hole is arranged farther than the sounder; the second sound hole communicates with the sounder through a second sound cavity provided.

[0013] A further technical solution is: further comprising a third sound outlet; the third sound outlet communicates with the sounder through a third sound cavity provided.

[0014] The further technical solution is: the first sound outlet is communicated with the sounder through a first sound-out cavity; the first sound-out cavity is provided with a sound guide wall, so that the sound of the sounder can pass from the sound guide wall After reflection, it comes out from the first sound hole.

[0015] A further technical solution is as follows: the sound generator is connected to the mounting cavity through a mounting seat provided; the mounting seat is arranged close to the first sound outlet cavity.

[0016] The further technical solution is: a plurality of installation protrusions are provided in the installation cavity; the installation seat is provided with an installation groove matching the installation protrusions; and the installation cavity is provided with a plurality of installation protrusions; The installation seat is provided with an installation groove matching the installation protrusion; the installation seat is detachably fixed in the installation cavity through the installation groove and the installation protrusion.

[0017] A further technical solution is as follows: the third sound outlet is communicated with the back cavity of the sound generator through the third sound cavity; the back cavity is arranged in the opposite direction of the sound output direction of the sound generator.

[0018] The further technical solution is: the second sound outlet is communicated with the back cavity of the sound generator through the second sound cavity; the first sound cavity is connected to the third sound cavity and the second sound outlet through the sound device Sound cavity partition.

[0019] A further technical solution is that the inner wall of the third sound outlet cavity relative to the third sound outlet hole is an arc structure.

[0020] A further technical solution is as follows: the installation cavity is constituted by a housing inner cavity; the outer side of the housing close to the first sound-out cavity is an arc-shaped recess; the first sound-out hole is arranged in The arc-shaped recessed portion is such that the first sound hole has an arc-shaped structure and faces the ear hole. [0021] An audio glasses for directional sound output, comprising a glasses body, the above-mentioned directional sound output structure, a control circuit and a battery; the directional sound output structure is arranged on the ears of the glasses body, and the control circuit , The battery is located in the temple of the glasses body;

[0022] The first sound hole is provided at the side of the temple near the ear; the second sound hole is provided at the end of the temple

[0023] A further technical solution is: the mounting cavity and the sound outlet cavity are formed in the inner cavity of the temple; the first sound hole and the third sound hole are provided on the lower side of the temple.

[0024] The further technical solution is: a fixed cavity for installing a control circuit or a battery is provided in the eyeglass legs; the control circuit and the battery are located on the same eyeglass leg or are respectively located on the two eyeglass legs near one end of the eyeglass frame .

[0025] The further technical solution is: the control circuit is provided with a Bluetooth module; or/and a microphone.

[0026] A further technical solution is: the control circuit is provided with a charging port, and the charging port is provided on the lower side of the temple.

[0027] The beneficial effects of the present application compared with the prior art are: the directional sound output structure of the present application is provided with a number of sound holes on the mounting cavity, and the sound holes communicate with the sounder through the sound cavity, making it close to The sound hole of the ear hole can propagate normal phase sound waves, and the sound hole farther than the ear hole propagates anti-phase sound waves at the time, causing interference near the ear and superimposing each other, so that a superimposed sound field is formed in the near ear area, and the sound wave in the area far away from the ear The interference cancels out, and the sound decays rapidly. In addition, the sound guide wall inside the first sound cavity can direct the sound waves emitted by the sound generator to the ear holes of the human body. Setting the directional sound output structure on the glasses can form audio glasses with directional sound output. This application has a simple structure, the sound emitted by the sounder can form a sound field at the ear hole through the action of the directional sounding structure, and the outside of the ear can not hear the sound from the sounder in the surrounding environment due to the effect of interference cancellation, thus realizing the function of directional sounding . Through the directional effect of the directional sound output structure, the audio glasses make the sound reaching the human ears increase while the power of the sound generator is unchanged, and the sound transmitted to other places is weakened.

[0028] The application will be further described below with reference to the drawings and specific embodiments.

[0029] BRIEF DESCRIPTION

[0030] FIG. 1 is a three-dimensional structure diagram of a near-ear directional sound output structure of the present application;

[0031] FIG. 2 is a front view of a directional sound output structure near the ear of the present application;

[0032] FIG. 3 is a side view of a directional sound output structure near the ear of the present application; [0033] FIG. 4 is an internal structure diagram of a near-ear directional sound output structure of the present application;

[0034] FIG. 5 is an internal structure diagram of a near-ear directional sound output structure of the present application;

[0035] FIG. 6 is an exploded view of a directional sound output structure near the ear of the present application;

[0036] FIG. 7 is a structural diagram of a mounting seat of a near-ear directional sound output structure of the present application;

[0037] FIG. 8 is a schematic view of the sound field of a near-ear directional sound output structure of the present application;

[0038] FIG. 9 is a three-dimensional structure diagram of an audio glasses for directional sound output in this application.

[0039] Specific embodiments

[0040] In order to fully understand the technical content of the present application, the technical solution of the present application will be further introduced and illustrated below in conjunction with specific embodiments, but it is not limited thereto.

[0041] Figures 1 to 9 are drawings of embodiments of the application.

[0042] A near-ear directional sound output structure Q, as shown in FIGS. 1 to 6, includes a mounting cavity 10, and a sounder 11 provided in the mounting cavity 10. The installation cavity 10 is provided with a plurality of sound holes. The sound hole communicates with the sounder 11 through the sound cavity provided. The sounder 11 may be a horn. The sound emitted by the sounder 11 is transmitted from the sound hole after the sound cavity is adjusted. The sound cavity is specially processed to make the sound propagate from the sound hole meet the requirements.

[0043] The sound hole includes a first sound hole 12 arranged close to the ear, and a third sound hole 13 and a second sound hole 14 arranged far from the ear. The first sound hole 12 is arranged close to the sound generator 11, and the third sound hole 13 and the second sound hole 14 are arranged farther than the sound generator 11. The first sound hole 12, the third sound hole 13, and the second sound hole 14 are arranged in different positions and have different functions. Since the sound generator 11 can generate positive and anti-phase sound waves, the positive phase sound waves are transmitted through the first sound cavity 15 to the first sound hole 12, and then transmitted to the human ear through the first sound hole 12; The inverted sound wave is transmitted to the third sound hole 13 and the second sound hole 14 through the third sound outlet 16 and the second sound cavity 18, and then to the environment around the ear.

[0044] The first sound outlet 12 communicates with the sounder 11 through the first sound outlet cavity 15. The inner wall of the first sound outlet cavity 15 has an arc-shaped structure, so that after the sound emitted by the sound generator 11 propagates to the inner wall, it is emitted back to form a concentrated state, and then is transmitted from the first sound outlet 12.

[0045] Preferably, an inclined sound guide wall is provided in the first sound outlet cavity 15, so that the sound of the sound generator 11 is reflected from the sound guide wall and then transmitted from the first sound outlet hole 12.

[0046] Alternatively, when the sound generator 11 is arranged obliquely, the inner wall of the first sound outlet cavity 15 serves as a sound guide wall, so that the sound generator 11 Sound can be reflected through.

[0047] Since the first sound hole 12 is facing the ear hole, the sound of the sound generator 11 is reflected to the ear hole after passing through the sound guide wall, thereby achieving the purpose of directional sound output.

[0048] Wherein, as shown in FIG. 7, the sounder 11 is connected to the mounting cavity 10 through a mounting seat 17 provided. The mounting seat 17 is arranged close to the first sound outlet 15. The mounting seat 17 is provided with a sound guide opening 172, so that the sound emitted by the sounder 11 can be transmitted from the first sound outlet 12 through the sound guide opening 172. The mounting base 17 is provided with a fixing hole 171 for fixing the sounder 11, so that the sounder 11 is fixed to the mounting cavity 10 behind the mounting base. The sound guide port 172 is set according to requirements, so that the sound of the sound generator 11 can be transmitted to the ear hole.

[0049] In other embodiments, the sounder 11 may be directly installed in the installation cavity 10.

[0050] Specifically, a number of mounting protrusions 101 are provided in the mounting cavity 10. The mounting base 17 is provided with a mounting groove 173 matching the mounting protrusion 101. The mounting base 17 is detachably fixed in the mounting cavity 10 through the mounting groove 173 and the mounting protrusion 101.

[0051] The inner wall of the third sound outlet cavity 16 relative to the third sound hole 13 has an arc structure, so that the sound output direction of the third sound hole 13 is determined and the sound wave energy is relatively concentrated.

[0052] The third sound outlet hole 13 communicates with the back cavity of the sound generator 11 through the third sound outlet cavity 16. The end of the third sound output cavity 16 is in communication with the back cavity, and the back cavity is set in the opposite direction of the sound output direction of the sound generator 11. The third sound outlet 13 is provided at the other end of the third sound cavity 16. The third sound-out cavity 16 is a long and narrow sound-guiding cavity, and the sound emitted by the sounder 11 is reflected and interfered by the second sound-guiding cavity 16, so that the sound propagated from the third sound-out hole 13 is an inverted sound wave, and The high frequency sound waves are filtered, and the low frequency sound waves are transmitted from the third sound outlet 13. The end of the second sound guide cavity 16 communicating with the back cavity is a big end, so that the sound waves of the sound generator 11 can fill the second sound guide cavity 16.

[0053] The second sound outlet hole 14 communicates with the back cavity of the sound generator 11 through the second sound outlet cavity 18. One end of the second sound outlet cavity 18 communicates with the back cavity, and the second sound outlet hole 14 is provided at the other end of the second sound outlet cavity 18. The end of the second sound outlet cavity 18 that communicates with the sounder 11 is the big end, and the cross-sectional area of the inner cavity of the second sound outlet cavity 18 gradually decreases in the direction in which it extends, and when it reaches the middle position, the second sound outlet The direction of the hole 14 gradually increases, forming a structure where the cross-sectional area of the inner cavity of the second sound cavity 18 is small in the middle and large at the two ends. The reverse cross-acoustic wave of the sounder 11 is transmitted from the back cavity through the second sound outlet cavity 18 and then from the second sound outlet hole 14. Since the second sound outlet cavity 18 has a filtering effect on high-frequency sound waves, the second sound outlet A low-to-mid frequency sound wave coming out of the hole 14.

[0054] Wherein, in order to achieve the low, medium and high frequency positive phase sound waves transmitted from the first sound outlet 12, the low, medium frequency reverse sound waves From the third sound hole 13 and the second sound hole 14, the first sound cavity 15 is separated from the third sound cavity 16 and the second sound cavity 18 through the sound generator 11 and the mounting seat 17, so that the positive The cross-talk wave is transmitted from the first sound hole 12, and the antiphase sound wave is transmitted from the third sound hole 13 and the second sound hole 14.

[0055] Preferably, the third sound-out cavity 16, the second sound-out cavity 18 are respectively arranged on both sides of the back cavity, and the first sound-out cavity 15, the third sound-out cavity 16, and the second sound-out cavity 18 are located The planes are parallel to each other.

[0056] The installation cavity 10 is constituted by the inner cavity of the housing 21 provided. The shell 21 is hollowed out inside, and the inner cavity is divided into the required first sound cavity 15, the third sound cavity 16, and the second sound cavity 18 as required. The outer side of the housing 21 close to the first sound outlet cavity 15 is an arc-shaped recess 211. The first sound hole 12 is provided in the arc-shaped recess 211, so that the first sound hole 12 has an arc structure. The bottom of the arc-shaped recess 211 matches the upper end of the root of the human ear. The first sound hole 12 is located at one end of the arc-shaped recess, so that the first sound hole 12 is directly opposite to the ear hole, so that the first sound hole 12 spreads Sound can be conducted to the eardrum through the ear hole.

[0057] The sound output directions of the first sound outlet hole 12 and the third sound outlet hole 13 are located on the same side of the housing 21, and the sound output direction of the second sound outlet hole 14 is the same as that of the first sound outlet hole 12 and the third sound outlet. The sound outlet direction of the sound hole 13 is vertical or forms a set angle. Specifically, the first sound hole 12 and the third sound hole 13 are provided on the lower side of the housing 21 so that the direction of sound is downward, and the second sound hole 14 is provided on the outside of the housing 21, so that the The tone direction is outward.

[0058] As shown in FIG. 7, the positive phase sound wave is transmitted from the first sound hole 12 near the ear hole, the reverse sound wave is transmitted through the third sound hole 13 and the second sound hole 14, and the reverse sound wave is relatively positive. The cross sound wave is far away from the ear hole. According to the wave interference theory, when the normal phase sound wave and the reverse phase sound wave meet, they can produce a cancellation effect at a local position, and attenuate with distance, the sound wave has a superposition effect at the local position, and a strengthened sound field is obtained. Therefore, the sound wave can only produce a sound field in a local area ( SPL) (that is, the sound field is at the distance from the ear hole), and the sound field far away from this local area is zero.

[0059] In another embodiment, the number of sound holes is not limited to three, and there may be multiple sound holes according to structural requirements and sound emission requirements.

[0060] An audio glasses for directional sound output, as shown in FIGS. 1 to 8 and 9, includes a glasses body 20, the above-mentioned directional sound output structure Q, a control circuit 22, and a battery 23. The directional sound output structure Q is arranged on the temple of the glasses body 20 close to one end of the ear. Similarly, the control circuit 22 and the battery 23 are provided on the temples of the glasses body 20 close to one end of the glasses frame. The first sound hole 12 is provided on the side of the temple near the ear. The second sound hole 14 is provided at the end of the temple, and the direction of the second sound hole 14 can be any direction. [0061] Wherein, the distance between the first sound hole 12 and the third sound hole 13 is Al, and the first sound hole 12 and the second sound hole

The distance of 14 is A2, Al: A2 is approximately equal to 1:1.

[0062] The installation cavity 10. The sound outlet cavity is formed in the inner cavity of the temple, and the sound outlet is also provided in the temple.

[0063] Wherein, the outer shell of the temple is formed by extending the shell 21 of the sound-emitting structure Q. The housing of the temple includes a first housing 211 and a second housing 212, and the cavity formed between the first housing 211 and the second housing 212 is the installation cavity 10. The installation cavity 10 is not only used to install the sound generator 11 and the sound guide cavity, but also can be used to install the control circuit 22 and the battery 23. Wherein, a fixed cavity 19 for installing the control circuit 22 or the battery 23 is provided in the temple. The fixed cavity 19 is separated by a baffle 24 provided in the installation cavity 10, so that the fixed cavity 19 does not interfere with the sound output cavity.

[0064] Preferably, the control circuit 22 and the battery 23 are provided on one of the temples or on the two temples respectively. In order to make the whole glasses more balanced, the battery 23 is arranged on one of the eyeglass legs, the control circuit 22 is arranged on the other eyeglass leg, and the battery 23 and the control circuit 22 are connected by wires passing through the glasses frame. At the same time, the battery 23 and the control circuit 22 can also be arranged in the same temple.

[0065] The control circuit 22 has a pickup for picking up environmental sounds. The sound field of the environment can be read by the pickup, and after electronic amplification, it is output to the sound generating device. The amplified sound field will only be heard by the user with the device, and will not be transmitted to the surrounding users. In this way, far-field pickup can be realized. The distance is played to users, such as those who need hearing assistance. In order to facilitate wireless connection with other electronic devices, the control circuit 22 is provided with a Bluetooth module

[0066] FIG. 8 is a schematic diagram of simulated sound output.

[0067] The control circuit 22 is provided with a charging interface, and the charging interface is provided on the underside of the temples, which is convenient for charging and beautiful.

[0068] In summary, the directional sound output structure of the present application is provided with a plurality of sound holes on the mounting cavity, and the sound holes communicate with the sound generator through the sound cavity, so that the sound holes close to the ear holes can be transmitted positively. Cross-acoustic waves, the sound holes farther than the earholes propagate antiphase sound waves at the time, causing interference near the ears, and superimposing each other, so that the near ear area forms a superimposed sound field, and the sound wave interference in the area away from the ears cancels out, and the sound attenuates rapidly. In addition, the sound guide wall inside the first sound cavity can direct the sound waves emitted by the sound generator to the ear holes of the human body. Setting the directional sound output structure on the glasses can form audio glasses with directional sound output. This application has a simple structure, the sound emitted by the sounder can form a sound field at the ear hole through the action of the directional sounding structure, and the ear Due to the effect of interference cancellation on the outside of the flower, the surrounding environment cannot hear the sound from the speaker, so that the function of directional pronunciation is realized. Through the directional effect of the directional sound output structure, the audio glasses make the sound reaching the human ears increase while the power of the sound generator is unchanged, and the sound transmitted to other places is weakened.

[0069] The foregoing only uses examples to further illustrate the technical content of this application for easier understanding by readers, but it does not mean that the implementation of this application is limited to this. Any technical extension or re-creation made according to this application is all Protected by this application. The scope of protection of this application is subject to the claims.

Summary of the invention

technical problem

The solution to the problem

The beneficial effects of the invention

Claims

[Claim 1] A directional sound output structure near the ear, characterized in that it comprises a mounting cavity, and a sound generator provided in the mounting cavity; a sound hole provided in the mounting cavity; and the sound hole passes through the device Some sound cavity is connected with the speaker;

The sound hole includes a first sound hole arranged close to the ear, and a second sound hole arranged far away from the ear; the first sound hole is arranged close to the sound generator, and the second sound hole is farther than The sound generator is arranged; the second sound hole communicates with the sound generator through a second sound cavity provided.

[Claim 2] The near-ear directional sound output structure according to claim 1, characterized in that it further comprises a third sound outlet; the third sound outlet passes through a provided third sound cavity Connect with speaker

[Claim 3] The near-ear directional sound output structure according to claim 1, wherein the first sound output hole communicates with the sounder through a first sound output cavity; the first sound output The cavity is provided with a sound guide wall, so that the sound of the sound generator is reflected from the sound guide wall and then transmitted from the first sound outlet hole.

[Claim 4] A directional sound output structure near the ear according to claim 3, wherein the sound generator is connected to the mounting cavity through a mounting seat provided; the mounting seat is close to the first output The sound cavity is set; the installation cavity is provided with a plurality of installation protrusions; the installation seat is provided with an installation groove matching the installation protrusion; the installation seat is detachably fixed to the installation cavity through the installation groove and the installation protrusion Inside.

[Claim 5] A near-ear directional sound output structure according to claim 2, wherein the third sound hole communicates with the back cavity of the sound generator through the third sound cavity; The back cavity is set in the opposite direction of the sound output direction of the speaker.

[Claim 6] The near-ear directional sound output structure according to claim 5, wherein the second sound hole communicates with the back cavity of the sounder through the second sound cavity; The first sound cavity is separated from the second sound cavity and the third sound cavity by the sound generator.

[Claim 7] The third sound-out cavity is a near-ear directional sound-out structure according to claim 6, wherein the mounting cavity is composed of a housing cavity provided; the housing is close to The outer side of the first sound outlet cavity is an arc-shaped recess; the first sound hole is provided in the arc-shaped recess, so that the first sound hole has an arc structure and faces the ear hole.

[Claim 8] An audio glasses for directional sound output, characterized by comprising the glasses body, the directional sound output structure of any one of claims 1 to 7, a control circuit and a battery; the directional sound output structure device The temple of the glasses body is close to one end of the ear, and the control circuit and the battery are arranged in the temple of the glasses body;

The first sound hole is arranged at the side of the temple near the ear; the second sound hole is arranged at the end of the temple.

[Claim 9] The audio glasses with directional sound output according to claim 8, wherein the mounting cavity and the sound output cavity are formed in the inner cavity of the temple; the first sound hole, the first sound outlet Three sound holes are provided on the underside of the temples.

[Claim 10] The audio glasses with directional sound output according to claim 8, characterized in that, a fixed cavity for mounting a control circuit or a battery is provided in the temples; the control circuit and the battery are provided in The same eyeglass legs or two eyeglass legs are respectively arranged at one end of the glasses frame.

[Claim 11] The audio glasses for directed sound output according to claim 8, characterized in that the control circuit is provided with a Bluetooth module; or/and a sound pickup.

[Claim 12] The audio glasses with directional sound output according to claim 8, wherein the control circuit is provided with a charging port, and the charging port is provided on the lower side of the temple.