Sound production device

Abstract

The embodiment of the invention relates to a sound production device which comprises a sound production part which comprises a shell and a vibrating diaphragm arranged in the shell, a front cavity and a rear cavity are arranged in the shell and on the two sides of the vibrating diaphragm respectively, the front cavity is acoustically coupled with a sound outlet hole formed in the shell and facing the external auditory canal of a user, and the rear cavity is acoustically coupled with a pressure relief hole in the shell; the ear hook comprises a first part hung between the auricles of the user and the head of the user and a second part which extends towards one side, deviating from the head, of the auricles of the user and is connected with the sound production part; the one or more microphones are arranged on the ear hook and are configured to collect environment sound to generate corresponding electric signals; and the processing circuit is used for amplifying the electric signal generated by the microphone and sending the processed electric signal to the sound production part. At least one of the one or more microphones is located at the first part of the ear hook, and a connecting line of the at least one microphone and the sound outlet hole penetrates through the auricle of the user.

Description

TECHNICAL FIELD

[0001] The present specification relates to the technical field of acoustics, and in particular, to a sound production device. BACKGROUND

[0002] A sound production device (e.g., a hearing aid) with an auxiliary hearing function is a tool, equipment, device, and instrument that can be used by hearing-impaired people to improve hearing impairment and thus improve the ability to communicate with others. Current types of hearing aids mainly include behind-the-ear hearing aids, in-the-canal hearing aids, etc. The wearing comfort and output effect of the sound production device (e.g., a hearing aid) greatly affect the selection and experience of users.

[0003] Therefore, it is necessary to provide a sound production device to improve the wearing comfort of users and the output effect of the sound production device. SUMMARY

[0004] One of the embodiments of the present specification provides a sound production device, which includes: a sound production part including a shell and a diaphragm arranged in the shell, in the shell, two sides of the diaphragm are respectively provided with a front cavity and a rear cavity, the front cavity is acoustically coupled with a sound outlet hole arranged on the shell, the sound outlet hole is arranged towards an external ear canal of a user, and the rear cavity is acoustically coupled with a pressure relief hole arranged on the shell; an ear hook including a first part and a second part, the first part is hung between an auricle of the user and a head of the user, and the second part extends to a side of the auricle of the user away from the head of the user and is connected to the sound production part, for placing the sound production part near the external ear canal of the user without blocking an ear canal opening of the user; one or more microphones arranged on the ear hook and configured to collect environmental sound to generate corresponding electrical signals; a processing circuit for amplifying and processing the electrical signals generated by the microphones and sending the processed electrical signals to the sound production part, the sound production part generates sound under the action of the electrical signals; wherein at least one of the one or more microphones is located at the first part of the ear hook, and a line connecting the at least one microphone and the sound outlet hole passes through the auricle of the user. By separating the auricle between the sound outlet hole and the microphone, the sound output by the sound production part is blocked by the auricle, reducing the sound output by the sound production part received by the microphone, reducing the influence of the sound production part on the microphone, and reducing the generation of echo, while the auricle can block wind, reducing the wind noise received by the microphone, thereby improving the output effect of the sound production device.

[0005] In some embodiments, the one or more microphones include a first microphone, and a ratio of a distance from the first microphone to a centroid of the sound outlet hole to a distance from the first microphone to a centroid of the pressure relief hole can range from 0.8 to 1.2. In this way, the sound paths of the sound outlet hole and the pressure relief hole to the first microphone are close to each other, so that the sounds output by the sound outlet hole and the pressure relief hole can cancel each other out at the first microphone, thereby reducing the sound output by the sound production part collected by the first microphone, reducing the generation of echo, and improving the output effect of the sound production device.

[0006] In some embodiments, the one or more microphones include a first microphone, a line connecting a centroid of the sound outlet hole and a centroid of the pressure relief hole has a midpoint and a vertical bisector plane defined by the midpoint, and an included angle between a line connecting the midpoint and the first microphone and the vertical bisector plane is -60°-60°. This can position the first microphone in a low-leakage sound area of the sound production part, reduce sound collected by the first microphone from the sound production part, reduce echo generation, and improve output effect of the sound production device.

[0007] In some embodiments, the one or more microphones include a first microphone, the first part includes a first contact point in contact with the user's head and a second contact point in contact with the user's pinna, and an absolute value of a difference between a distance from the first microphone to the first contact point and a distance from the first microphone to the second contact point is less than 1 mm. This can make the distances from the first microphone to the first contact point and the second contact point similar, i.e., the first microphone can be positioned near a vertical bisector plane of a line connecting the first contact point and the second contact point, and at the same time, the first microphone is far away from the first contact point and the second contact point, so that the first microphone is far away from the user's head skin or pinna, to reduce echo generated by the user's head skin or pinna interfering with the first microphone.

[0008] In some embodiments, the one or more microphones include a first microphone, the ear hook has an outermost end in the long axis direction of the sound production part, the outermost end is a tangent point of an outer tangent plane on an outer contour of the ear hook and perpendicular to the long axis direction of the sound production part, and a distance from the first microphone to the outermost end is not greater than 2 mm. This can make the first microphone in a wearing state be away from an inner contour of the ear hook on a side close to the user's pinna, so that the first microphone is away from the user's pinna, reduces echo generated by the user's ear interfering with the first microphone, and improves output effect of the sound production device.

[0009] In some embodiments, the one or more microphones include a first microphone, the first microphone is arranged at a first position of the ear hook, and a cross-sectional area of the ear hook at the first position is 75 mm 2 ~ 250 mm 2 . This can make the ear hook have sufficient structural strength while allowing the first microphone to be further away from the user's ear, to reduce echo and improve output effect of the sound production device.

[0010] In some embodiments, the one or more microphones include a first microphone, and a first part of the ear hook includes a receiving cavity, and the processing circuit and the first microphone are arranged in the receiving cavity. The receiving cavity can protect the first microphone and the processing circuit. Compared with the size of other positions on the ear hook, the size of the receiving cavity is larger, which can make the first microphone be further away from the user's ear and head skin, to reduce echo and improve output effect of the sound production device.

[0011] In some embodiments, the one or more microphones include a first microphone, and a distance from the first microphone to a plane of the ear hook of the ear hook is greater than 10 mm. Avoiding the distance from the first microphone to the plane of the ear hook being too small avoids the user's head skin interfering with the first microphone and producing echo, thereby improving the output effect of the sound production device.

[0012] In some embodiments, the one or more microphones include a second microphone and a third microphone, and the second microphone and the third microphone are both arranged on the ear hook, the second microphone is located in front of the third microphone, and a line connecting the third microphone and the sound hole passes through the user's pinna. The sound output by the sound production part is blocked by the pinna, and the third microphone receives less sound output by the sound production part, thereby reducing the generation of echo and improving the output effect of the sound production device.

[0013] In some embodiments, a projection of the ear hook on a sagittal plane of the user includes an outer contour, and the outer contour has extreme points in a short axis direction of a projection of the sound production part on the sagittal plane. The projection of the second microphone on the sagittal plane and the projection of the third microphone on the sagittal plane are located on two sides of the extreme points, respectively. In this way, the line connecting the second microphone and the third microphone can be directed to the front of the user, so as to better collect the sound emitted by the conversation object in front of the user.

[0014] In some embodiments, the second microphone is located in front of the user's pinna. In this way, the second microphone is not blocked by the user's pinna, thereby improving the pickup effect of the second microphone on the sound of the external environment. In addition, the second microphone can be close to the user's face, so as to better collect the sound emitted by the conversation object in front of the user.

[0015] In some embodiments, in the wearing state, a projection of the second microphone on a sagittal plane of the user is located outside a projection of the user's pinna on the sagittal plane of the user. In this way, the second microphone is not blocked by the user's pinna, thereby improving the pickup effect of the second microphone on the sound of the external environment.

[0016] In some embodiments, in the wearing state, an angle between a line connecting the second microphone and the third microphone and a sagittal axis of the user is -10°-10°. In this way, the line connecting the second microphone and the third microphone is directed to the front of the user, so as to better collect the sound emitted by the conversation object in front of the user.

[0017] In some embodiments, an angle between a line connecting the second microphone and the third microphone and a long axis direction of the sound production part is -30°-30°. In this way, the line connecting the second microphone and the third microphone is directed to the front of the user, so as to better collect the sound emitted by the conversation object in front of the user.

[0018] In some embodiments, the distance between the second microphone and the third microphone is 5mm-20mm. In this way, the time difference between the time when the sound emitted by the conversation object in front of the user reaches the second microphone and the time when the sound reaches the third microphone can be ensured while the pinna isolation between the second microphone and the third microphone is eliminated, so that the second microphone and the third microphone can collect the sound emitted by the conversation object in front of the user with a large phase difference and a small amplitude difference, thereby facilitating the differential processing and improving the collection effect of the sound emitted by the conversation object in front of the user.

[0019] In some embodiments, the projection of the ear hook on the sagittal plane of the user includes an outer contour and an inner contour, and the projection of the second microphone on the sagittal plane and the projection of the third microphone on the sagittal plane are both arranged close to the outer contour compared with the inner contour. That is, the second microphone and the third microphone are arranged on the side of the ear hook away from the pinna of the user, so that the second microphone and the third microphone can be away from the skin of the head of the user, the interference of the skin of the user is reduced, the echo is reduced, and the output effect of the sound emitting device is improved.

[0020] In some embodiments, the sound hole and the pressure relief hole present directivity to the sound radiated by the sound emitting device to the far field, and the absolute value of the difference between the sound pressure levels of the sound emitting device at two far field positions in the specific direction and the opposite direction thereof in the target frequency range is not less than 6dB, and the line connecting the sound hole and the pressure relief hole defines the specific direction. In this way, a larger volume can be received at the entrance of the ear canal of the user, and the user can obtain a clear listening effect.

[0021] In some embodiments, the line connecting the centroid of the sound hole and the centroid of the pressure relief hole has a midpoint, and the included angle between the line connecting the second microphone and the midpoint and the line connecting the centroid of the sound hole and the centroid of the pressure relief hole is 0°-30°. In this way, the second microphone can be arranged near the 180° direction of the cardioid directivity of the sound field of the sound emitting part, and the sound output by the sound emitting part collected by the second microphone is reduced, and the generation of echo is reduced.

[0022] In some embodiments, the line connecting the centroid of the sound hole and the centroid of the pressure relief hole has a midpoint, and the included angle between the line connecting the third microphone and the midpoint and the line connecting the centroid of the sound hole and the centroid of the pressure relief hole is -30°-0°. In this way, the third microphone can be arranged near the 180° direction of the cardioid directivity of the sound field of the sound emitting part, and the sound output by the sound emitting part collected by the third microphone is reduced, and the generation of echo is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] The present specification will be further illustrated in the form of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting, and in these embodiments, the same reference numbers represent the same structures, wherein:

[0024] Figure 1 is an exemplary ear diagram shown in accordance with some embodiments of the present specification;

[0025] Figure 2 is an exemplary wearing diagram of a sound production device shown in accordance with some embodiments of the present specification;

[0026] Figure 3 is another exemplary wearing diagram of a sound production device shown in accordance with some embodiments of the present specification;

[0027] Figure 4 is an exemplary wearing diagram of a sound production device shown in accordance with some embodiments of the present specification;

[0028] Figure 5 is an exemplary projection diagram of a sound production device in a user sagittal plane shown in accordance with some embodiments of the present specification;

[0029] Figure 6 is an exemplary structural diagram of a sound production device in an unworn state shown in accordance with some embodiments of the present specification;

[0030] Figure 7 is an exemplary sound pressure level sound field distribution diagram of a sound production portion shown in accordance with some embodiments of the present specification;

[0031] Figure 8A is a relative position diagram of a pressure relief hole, a sound outlet hole, and a first microphone shown in accordance with some embodiments of the present specification;

[0032] Figure 8B is a relative position diagram of a pressure relief hole, a sound outlet hole, and a first microphone from another perspective shown in accordance with some embodiments of the present specification;

[0033] Figure 9 is a cross-sectional diagram of a first microphone at an ear hook shown in accordance with some embodiments of the present specification;

[0034] Figure 10 is an exemplary internal structural diagram of a sound production portion shown in accordance with some embodiments of the present specification;

[0035] Figure 11 is a directivity diagram of a sound production portion shown in accordance with some embodiments of the present specification;

[0036] Figure 12 is a sound pressure level sound field distribution diagram of a sound production portion shown in accordance with some embodiments of the present specification. DETAILED DESCRIPTION

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present specification, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some examples or embodiments of the present specification, and for those skilled in the art, the present specification can also be applied to other similar scenarios without creative labor on the basis of these drawings. Unless it is clear from the language environment or otherwise stated, the same reference numbers in the drawings represent the same structure or operation.

[0038] It should be understood that the "system", "device", "unit" and / or "module" used herein is a method for distinguishing different components, elements, parts, sections or assemblies at different levels. However, if other words can achieve the same purpose, the words can be replaced by other expressions.

[0039] As shown in the specification and claims, unless the context clearly indicates otherwise, the words "one", "a", "an", and / or "the" do not refer to the singular, but can also include the plural. Generally speaking, the terms "comprise" and "include" only indicate the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements.

[0040] Flowcharts are used in the present specification to illustrate the operations performed by the system according to the embodiments of the present specification. It should be understood that the preceding or subsequent operations are not necessarily performed in sequence. On the contrary, each step can be processed in reverse order or simultaneously. At the same time, other operations can also be added to these processes, or one or more steps of operation can be removed from these processes.

[0041] The sound production device with hearing aid function, such as a hearing aid, mainly includes a microphone for collecting external sound, a processing circuit for processing the signal, a speaker for outputting sound, etc. The signal collected by the microphone is sent to the speaker after being processed (e.g., amplified) by the processing circuit, and played by the speaker to the user. In some cases, the microphone may collect the sound played by the speaker, and the processing circuit will amplify this part of the sound signal and send it to the speaker again for playing, thereby forming an echo, resulting in poor output effect of the hearing aid.

[0042] The current hearing aid types mainly include a behind-the-ear hearing aid, a in-the-canal hearing aid, etc. The behind-the-ear hearing aid includes an in-the-ear hearing aid, an open hearing aid, etc. Among them, the in-the-canal hearing aid is arranged in the external auditory canal of the user, and the in-the-ear hearing aid blocks the ear canal of the user when worn. Both of them will reduce the wearing comfort of the user when worn for a long time. However, the speaker of the in-the-canal hearing aid and the in-the-ear hearing aid is located in the external auditory canal of the user in the wearing state, and the microphone is located outside the external auditory canal. The sound produced by the speaker is isolated by the external auditory canal of the user, and is not easy to be collected by the speaker, and is not easy to produce echo, and the output effect is better. The open hearing aid will not block the ear canal of the user, and the wearing comfort is higher. However, the sound transmission path is easy to be formed between the speaker and the microphone of the open hearing aid, and a large echo is generated, which leads to the problem of poor output effect.

[0043] In order to solve the above problems, some embodiments of the present specification provide an open sound production device, which mainly includes a sound production part, an ear hook, one or more microphones and a processing circuit. Among them, the microphone can collect external sound signals and generate corresponding electric signals, the processing circuit can process and amplify the electric signals, and the sound production part outputs sound according to the amplified electric signals. Among them, the ear hook includes a first part hung between the auricle of the user and the head of the user and a second part extending to the side of the auricle of the user away from the head of the user and connecting the sound production part. The ear hook can place the sound production part in a position near the external auditory canal of the user without blocking the ear canal of the user, thereby improving the wearing comfort of the sound production device. Further, at least one of the one or more microphones is located on the first part of the ear hook, and the line connecting the at least one microphone and the sound hole on the shell of the sound production part passes through the auricle. By separating the auricle between the sound hole and the microphone, the sound output by the sound production part is blocked by the auricle, reducing the sound output by the sound production part received by the microphone, reducing the influence of the sound production part on the microphone, reducing the generation of echo, and at the same time the auricle can block the wind, reducing the wind noise received by the microphone, thereby improving the output effect of the sound production device.

[0044] Figure 1 is an exemplary ear diagram according to some embodiments of the present specification.

[0045] As Figure 1 shown, the ear 100 can include an external auditory canal 101, a concha cavity 102, a cymba concha 103, a triangular fossa 104, an antihelix 105, a scapha 106, a helix 107, a tragus 108, and an antitragus 109. In some embodiments, the pinna (or auricle) can be a collective term for the other parts of the external ear of the ear 100 other than the external auditory canal 101. For example, as Figure 1As shown, the auricle can include the concha cavity 102, the cymba 103, the triangular fossa 104, the antihelix 105, the scapha 106, the helix 107, the antitragus 108, and the tragus 109. It is noted that, for ease of description, the antihelix superior crus, the antihelix inferior crus, and the antihelix 105 are collectively referred to as the antihelix region in the embodiments of the present specification. In some embodiments, the support of the sound production device by one or more parts of the ear 100 can achieve the stability of the sound production device in wearing. In some embodiments, the outer ear canal 101, the concha cavity 102, the cymba 103, the triangular fossa 104, and the like have a certain depth and volume in the three-dimensional space, and can be used to achieve the wearing requirement of the sound production device. For example, the sound production device (e.g., an in-ear hearing aid) can be worn in the outer ear canal 101. In some embodiments, the sound production device can be worn by means of other parts of the ear 100 except the outer ear canal 101. For example, the sound production device can be worn by means of the cymba 103, the triangular fossa 104, the antihelix 105, the scapha 106, or the helix 107, or a combination thereof. In some embodiments, in order to improve the comfort and reliability of the sound production device in wearing, the antitragus 108 and the like of the user can also be further used. By means of the wearing of the sound production device and the propagation of sound by other parts of the ear 100 except the outer ear canal 101, the outer ear canal 101 of the user can be "liberated". In some embodiments, according to the structure of the ear 100, the sound production device can be designed to be adapted to the structure of the ear 100 to achieve the wearing of the sound production part of the sound production device at different positions of the ear 100. For example, when the sound production device is an open hearing aid, the open hearing aid can include an ear hook and a sound production part, the sound production part is connected to the ear hook by a physical way, and the ear hook can be adapted to the shape of the auricle to place the whole or part of the structure of the sound production part on the upper part of the tragus (e.g., the positions of one or more parts of the tragus 109, the cymba 103, the triangular fossa 104, the antihelix 105, the scapha 106, the helix 107, and the like). For another example, when the user wears the open hearing aid, the whole or part of the structure of the sound production part can be located in the cavity formed by one or more parts of the ear 100 (e.g., the concha cavity 102, the cymba 103, the triangular fossa 104, and the like).

[0046] Different users can have individual differences, resulting in different sizes of the ear 100, such as different shapes, sizes, etc. For ease of description and understanding, if not specifically stated, the present specification will mainly take an ear model with "standard" shape and size as a reference to further describe the wearing manner of the sound generating device in different embodiments on the ear model. For example, a simulator containing a head and its (left, right) ear 100 made based on ANSI: S3.36, S3.25 and IEC: 60318-7 standards, such as GRAS 45BC KEMAR, HEAD Acoustics, B&K 4128 series or B&K 5128 series, can be taken as a reference for wearing the sound generating device, so as to present the scenario of most users normally wearing the sound generating device. Taking GRAS KEMAR as an example, the simulator of the ear can be any one of GRAS 45AC, GRAS 45BC, GRAS 45CC or GRAS 43AG, etc. Taking HEAD Acoustics as an example, the simulator of the ear can be any one of HMS II.3, HMS II.3LN or HMS II.3LNHEC, etc. It should be noted that the data range measured in the embodiments of the present specification is measured on the basis of GRAS 45BC KEMAR, but it should be understood that there can be differences between different head models and ear models, and the relevant data range can fluctuate by ±10% when using other models. Merely as an example, the reference ear 100 can have the following relevant characteristics: the size of the projection of the pinna on the vertical axis direction in the sagittal plane can be in the range of 49.5mm-74.3mm, and the size of the projection of the pinna on the sagittal axis direction in the sagittal plane can be in the range of 36.6mm-55mm. Therefore, in the present application, descriptions such as "worn by a user", "in a wearing state" and "in a wearing state" can refer to the sound generating device described in the present application being worn on the ear 100 of the aforementioned simulator. Of course, considering that different users have individual differences, the structure, shape, size, thickness, etc. of one or more parts of the ear 100 can be designed differently according to different shapes and sizes of the ear 100, and these different designs can be manifested in that the characteristic parameters of one or more parts (for example, the sound generating part, the ear hook, etc. below) of the sound generating device can have different ranges of values, so as to adapt to different ears 100. In addition, it should be noted that the "non-wearing state" is not limited to only the state that the sound generating device is not worn on the ear 100 of the user, but also includes the state that the sound generating device is not deformed by external force; the "wearing state" is not limited to only the state that the sound generating device is worn on the ear 100 of the user, and the ear hook and the sound generating part being opened to a corresponding distance can also be regarded as a wearing state.

[0047] It should be noted that in the field of medicine, anatomy, etc., three basic sections of the human body, i.e., a sagittal plane, a coronal plane and a horizontal plane, and three basic axes, i.e., a sagittal axis, a coronal axis and a vertical axis, can be defined. The sagittal plane is a section perpendicular to the ground surface made along the front-to-back direction of the body, which divides the human body into two parts, i.e., left and right parts; the coronal plane is a section perpendicular to the ground surface made along the left-to-right direction of the body, which divides the human body into two parts, i.e., front and back parts; and the horizontal plane is a section parallel to the ground surface made along the up-to-down direction perpendicular to the body, which divides the human body into two parts, i.e., upper and lower parts. Correspondingly, the sagittal axis is an axis perpendicular to the coronal plane along the front-to-back direction of the body, the coronal axis is an axis perpendicular to the sagittal plane along the left-to-right direction of the body, and the vertical axis is an axis perpendicular to the horizontal plane along the up-to-down direction of the body. Further, the front side of the ear part is a concept relative to the back side of the ear part, the front side of the ear part refers to the side of the ear part 100 facing the facial region of the human body along the direction of the sagittal axis, and the back side of the ear part refers to the side of the ear part 100 away from the facial region of the human body along the direction of the sagittal axis. When the ear part 100 of the above-mentioned simulator is observed along the direction of the coronal axis of the human body, the front side profile of the ear part 100 shown in FIG. 1A can be obtained. Figure 1

[0048] The above description of the ear part 100 is only for the purpose of illustration and is not intended to limit the scope of the present application. Those skilled in the art can make various changes and modifications according to the description of the present application. For example, part of the structure of the sound generating device can shield part or all of the external auditory canal 101. These changes and modifications are still within the scope of protection of the present application.

[0049] Figure 2 is an exemplary wearing diagram of the sound generating device according to some embodiments of the present specification, Figure 3 is another exemplary wearing diagram of the sound generating device according to some embodiments of the present specification. As shown in Figure 2 and Figure 3 As shown in FIG. 1A, the sound generating device 10 can include a sound generating part 11, an ear hook 12, one or more microphones (for example, a microphone 13) disposed on the ear hook 12, and a sound guide part 14. Figure 3 ​A point, or the B point and the C point) and a processing circuit (not shown in the figure). In some embodiments, the sound production device 10 can be worn on the user's body (e.g., the head, neck or upper torso of the human body) by the ear hook 12 to wear the sound production part 11, while the sound production part 11 can be close to the user's external ear canal but not block the ear canal opening, so that the user's ear 100 remains open, improving the wearing comfort of the sound production device 10. One or more microphones can collect external environmental sound and generate corresponding electrical signals, and the processing circuit can amplify the electrical signals generated by the microphone, and the sound production part 11 generates sound output under the excitation of the amplified electrical signals.

[0050] In some embodiments, the sound production part 11 can include a shell 111 and a diaphragm 112 arranged in the shell 111, the shell 111 can be used to be worn on the user's body and can carry the diaphragm 112. In some embodiments, the shell 111 can be a closed shell structure with an internal cavity, and the diaphragm 112 is located in the internal cavity of the shell 111. In some embodiments, the shell 111 can be a shell structure with a shape adapted to the human ear 100, such as a circular ring, an ellipse, a polygon (regular or irregular), a U shape, a V shape, a semicircle, etc., so that the shell 111 can be directly hung on the user's ear 100. In some embodiments, the shell 111 can further include a fixing structure. Exemplarily, the fixing structure can be an ear hook, an elastic band, etc., so that the sound production device 10 can be better worn on the user's body to prevent the user from falling during use.

[0051] In some embodiments, when the user wears the sound production device 10, the sound production part 11 can be located above, below, in front of (e.g., in front of the tragus) or in the concha (e.g., in the concha cavity) of the user's ear 100.

[0052] In some embodiments, when the diaphragm 112 vibrates, sound can be emitted from the front side and the back side of the diaphragm 112 respectively. The front side of the diaphragm 112 inside the housing 111 is provided with a front cavity (not labeled in the figure) for transmitting sound, and the back side of the diaphragm 112 inside the housing 111 is provided with a back cavity (not labeled in the figure) for transmitting sound. The housing 111 can also be provided with a sound outlet hole 1111 acoustically coupled to the front cavity and a pressure relief hole 1112 acoustically coupled to the back cavity. The sound from the front side of the diaphragm 112 can be emitted from the sound outlet hole 1111 through the front cavity, and the sound from the back side of the diaphragm 112 can be emitted from the pressure relief hole 1112 through the back cavity. In some embodiments, the diaphragm 112 in the sound emitting part 11 can output sound with a phase difference (for example, opposite phase) through the sound outlet hole 1111 and the pressure relief hole 1112. When the diaphragm 112 vibrates, the front side and the back side of the diaphragm 112 can simultaneously produce a set of sound with a phase difference (for example, opposite phase). After the sound passes through the front cavity and the back cavity respectively, it is propagated outward from the positions of the sound outlet hole 1111 acoustically coupled to the front cavity and the pressure relief hole 1112 acoustically coupled to the back cavity. In some embodiments, the sound outlet hole 1111 can be located on the inner side wall (for example, the inner side IS) of the housing 111 of the sound emitting part 11 facing the user's external auditory canal 101, and the pressure relief hole 1112 can be located on the side (for example, the outer side OS) of the housing 111 of the sound emitting part 11 away from the user's external auditory canal 101.

[0053] In combination Figure 1 , Figure 2 with Figure 3 , Figure 2 11A, 11B and 11C in FIGS. Figure 3Fig. 11C is a schematic view of the sound generating portion 11 in a position shown by 11C when worn. In some embodiments, at least part of the sound generating portion 11 can be located in the region in front of the eardrum or in the front-lateral region of the pinna when the user wears the sound generating device 10. In the following, the sound generating portion 11 (e.g., the sound generating portion 11A, the sound generating portion 11B and the sound generating portion 11C) in different wearing positions will be exemplarily described. It should be noted that the front-lateral side of the pinna referred to in the embodiments of the present specification means the side of the pinna away from the head along the coronal axis, and correspondingly, the rear-medial side of the pinna means the side of the pinna towards the head along the coronal axis. In some embodiments, the sound generating portion 11A is located on the side of the user's ear 100 along the sagittal axis towards the human facial region, that is, the sound generating portion 11A is located on the front side of the ear 100 towards the human facial region. Further, the inside of the shell of the sound generating portion 11A is provided with a diaphragm 112, and at least one sound outlet hole 1111 can be provided on the shell 111 of the sound generating portion 11A, which can be located on the side wall of the shell 111 of the sound generating portion 11A towards or close to the user's external auditory canal 101, and the diaphragm 112 can output sound to the user's external auditory canal 101 through the sound outlet hole 1111. In some embodiments, the sound generating portion 11 can have a long axis direction Y and a short axis direction Z perpendicular to the thickness direction X and orthogonal to each other. Among them, the long axis direction Y can be defined as the direction with the largest extension size in the shape of the two-dimensional projection plane (e.g., the projection of the sound generating portion 11 on the plane where the outer side of the sound generating portion 11 is located, or the projection on the sagittal plane) of the sound generating portion 11 (e.g., when the projection shape is a rectangle or an approximate rectangle, the long axis direction is the length direction of the rectangle or the approximate rectangle), and the short axis direction Z can be defined as the direction perpendicular to the long axis direction Y in the shape of the sound generating portion 11 projected on the sagittal plane (e.g., when the projection shape is a rectangle or an approximate rectangle, the short axis direction is the width direction of the rectangle or the approximate rectangle). The thickness direction X can be defined as the direction perpendicular to the two-dimensional projection plane, for example, consistent with the direction of the coronal axis, both pointing to the left and right of the body. In some embodiments, the thickness direction X can also be defined as the direction of the sound generating portion 11 close to or away from the ear 100 in the wearing state. In some embodiments, when the sound generating portion 11 is in an inclined state in the wearing state, the long axis direction Y and the short axis direction Z are still parallel or approximately parallel to the sagittal plane, the long axis direction Y can have a certain angle with the direction of the sagittal axis, that is, the long axis direction Y is also correspondingly inclined, and the short axis direction Z can have a certain angle with the direction of the vertical axis, that is, the short axis direction Z is also inclined, such as Figure 2 Fig. 11C is a schematic view of the sound generating portion 11 in a position shown by 11C when worn. In some embodiments, at least part of the sound generating portion 11 can be located in the region in front of the eardrum or in the front-lateral region of the pinna when the user wears the sound generating device 10. In the following, the sound generating portion 11 (e.g., the sound generating portion 11A, the sound generating portion 11B and the sound generating portion 11C) in different wearing positions will be exemplarily described. It should be noted that the front-lateral side of the pinna referred to in the embodiments of the present specification means the side of the pinna away from the head along the coronal axis, and correspondingly, the rear-medial side of the pinna means the side of the pinna towards the head along the coronal axis. In some embodiments, the sound generating portion 11A is located on the side of the user's ear 100 along the sagittal axis towards the human facial region, that is, the sound generating portion 11A is located on the front side of the ear 100 towards the human facial region. Further, the inside of the shell of the sound generating portion 11A is provided with a diaphragm 112, and at least one sound outlet hole 1111 can be provided on the shell 111 of the sound generating portion 11A, which can be located on the side wall of the shell 111 of the sound generating portion 11A towards or close to the user's external auditory canal 101, and the diaphragm 112 can output sound to the user's external auditory canal 101 through the sound outlet hole 1111. In some embodiments, the sound generating portion 11 can have a long axis direction Y and a short axis direction Z perpendicular to the thickness direction X and orthogonal to each other. Among them, the long axis direction Y can be defined as the direction with the largest extension size in the shape of the two-dimensional projection plane (e.g., the projection of the sound generating portion 11 on the plane where the outer side of the sound generating portion 11 is located, or the projection on the sagittal plane) of the sound generating portion 11 (e.g., when the projection shape is a rectangle or an approximate rectangle, the long axis direction is the length direction of the rectangle or the approximate rectangle), and the short axis direction Z can be defined as the direction perpendicular to the long axis direction Y in the shape of the sound generating portion 11 projected on the sagittal plane (e.g., when the projection shape is a rectangle or an approximate rectangle, the short axis direction is the width direction of the rectangle or the approximate rectangle). The thickness direction X can be defined as the direction perpendicular to the two-dimensional projection plane, for example, consistent with the direction of the coronal axis, both pointing to the left and right of the body. In some embodiments, the thickness direction X can also be defined as the direction of the sound generating portion 11 close to or away from the ear 100 in the wearing state. In some embodiments, when the sound generating portion 11 is in an inclined state in the wearing state, the long axis direction Y and the short axis direction Z are still parallel or approximately parallel to the sagittal plane, the long axis direction Y can have a certain angle with the direction of the sagittal axis, that is, the long axis direction Y is also correspondingly inclined, and the short axis direction Z can have a certain angle with the direction of the vertical axis, that is, the short axis direction Z is also inclined, such asFigure 4 and the corresponding description thereof. In some embodiments, the sound production portion 11 in the wearing state can also be in a horizontal state or an approximately horizontal state, as shown in Figure 2 and Figure 3 As shown in the sound production portion 11C of Figure 2 , the long axis direction Y can be consistent or approximately consistent with the direction of the sagittal axis, both pointing to the front-back direction of the body, and the short axis direction Z can be consistent or approximately consistent with the direction of the vertical axis, both pointing to the up-down direction of the body. It should be noted that, in the wearing state, the sound production portion 11C in the approximately horizontal state can mean that the angle between the long axis direction Y of the sound production portion 11C and the sagittal axis is within a certain range (for example, not greater than 20°). In addition, the wearing position of the sound production portion 11 is not limited to the sound production portion 11A, the sound production portion 11B, and the sound production portion 11C shown in Figure 2 , as long as at least part of the sound production portion 11 can be located in the area in front of the eardrum of the user's ear 100 or the front-lateral area of the pinna. For example, the sound production portion 11 as a whole or in part can be located in front of the eardrum 109. For another example, the sound production portion 11 as a whole or in part can be in contact with the upper part of the external auditory canal 101 (for example, the position of one or more parts such as the eardrum 109, the cymba concha 103, the triangular fossa 104, the antihelix 105, the scaphal 106, and the helix 107). For another example, the sound production portion 11 as a whole or in part can be located in the cavity formed by one or more parts of the ear 100 (for example, the concha cavity 102, the cymba concha 103, and the triangular fossa 104).

[0054] In some embodiments, in the wearing state, the ear hook 12 includes a first part 121 and a second part 122 (as shown in Figure 5 ), the first part 121 is hung between the pinna of the user's ear and the head, and the second part 122 extends to the side of the pinna away from the head and connects the sound production portion 11, wearing the sound production portion 11 at a position near the external auditory canal but not blocking the auditory canal opening.

[0055] In some embodiments, the first part 121 of the ear hook 12 includes a containing bin 123. The processing circuit can be arranged in the containing bin 123, and the containing bin 123 can protect the processing circuit. In some embodiments, the containing bin 123 is located at the end of the first part 121 away from the sound production portion 11, and the projection profile of the end of the ear hook 12 away from the sound production portion 11 is the projection profile of the free end of the containing bin 123 in the sagittal plane of the user. In some embodiments, when the user wears the sound production device 10, the sound production portion 11 and the containing bin 123 can be located at the front side and the rear side of the pinna, respectively.

[0056] To improve the stability of the sound production device 10 in the wearing state, the sound production device 10 can adopt any one or a combination of the following ways. First, at least part of the ear hook 12 is provided as a contoured structure that fits at least one of the rear side of the ear and the head, so as to increase the contact area of the ear hook 12 with the ear 100 and / or the head, thereby increasing the resistance of the sound production device 10 from falling off the ear 100. Second, at least part of the ear hook 12 is provided as an elastic structure, so as to have a certain amount of deformation in the wearing state, so as to increase the normal pressure of the ear hook 12 on the ear 100 and / or the head, thereby increasing the resistance of the sound production device 10 from falling off the ear 100. Third, at least part of the ear hook 12 is provided to abut against the head in the wearing state, so as to form a counterforce that presses the ear 100, so that the sound production part 11 is pressed against the front side of the ear, thereby increasing the resistance of the sound production device 10 from falling off the ear 100. Fourth, the sound production part 11 and the ear hook 12 are provided to clamp the area of the antihelix, the area of the concha cavity 102, etc. from both sides of the ear 100 in the wearing state, thereby increasing the resistance of the sound production device 10 from falling off the ear 100. Fifth, the sound production part 11 or the auxiliary structure connected thereto is provided to at least partially extend into the cavities such as the concha cavity 102, the cymba concha 103, the triangular fossa 104, and the scaphoid fossa 106, thereby increasing the resistance of the sound production device 10 from falling off the ear 100.

[0057] For example, the sound production part 11 and the ear hook 12 are provided to clamp the area of the antihelix, the area of the concha cavity 102, etc. from both sides of the ear 100 in the wearing state, thereby increasing the resistance of the sound production device 10 from falling off the ear 100. Figure 4 In the wearing state, the free end FE of the sound production part 11 can extend into the concha cavity 102. Among them, the sound production part 11 and the ear hook 12 can be provided to jointly clamp the aforementioned ear area from both sides of the ear area corresponding to the concha cavity 102, thereby increasing the resistance of the sound production device 10 from falling off the ear 100, and further improving the stability of the sound production device 10 in the wearing state. For example, the free end FE is pressed in the concha cavity 102 in the thickness direction X; for another example, the free end FE abuts in the concha cavity 102 in the long axis direction Y and the short axis direction Z.

[0058] Figure 4 is an example wearing schematic diagram of the sound production device according to some embodiments of the present specification, Figure 5 is an example projection schematic diagram of the sound production device according to some embodiments of the present specification in the sagittal plane of the user, Figure 6 is an example structure schematic diagram of the sound production device in the unwearing state according to some embodiments of the present specification. Among them, Figure 5 The A' point, B' point, C' point, D' point, E' point, P' point, Q' point, M' point, and H' point in Figure 4 are the projection points of the A point, B point, C point, D point, E point, P point, Q point, M point, and H point in the sagittal plane of the user.

[0059] In some embodiments, please refer toFigure 4 、 Figure 5 With Figure 6 , the sound production portion 11 can have an inner side surface IS facing the ear in the thickness direction X in the wearing state and an outer side surface OS facing away from the ear, and a connecting surface connecting the inner side surface IS and the outer side surface OS. It should be noted that in the wearing state, as viewed in the direction of the coronal axis (i.e., the thickness direction X), the sound production portion 11 can be provided in a circular, elliptical, rounded square, rounded rectangular, or the like shape. Among them, when the sound production portion 11 is provided in a circular, elliptical, or the like shape, the above-mentioned connecting surface can refer to the arc-shaped side surface of the sound production portion 11; and when the sound production portion 11 is provided in a rounded square, rounded rectangle, or the like shape, the above-mentioned connecting surface can include the lower side surface LS, the upper side surface US, and the rear side surface RS mentioned below. Therefore, for ease of description, the present embodiment will be exemplarily described by taking the sound production portion 11 provided in a rounded rectangle as an example. Among them, the length of the sound production portion 11 in the major axis direction Y can be greater than the width of the sound production portion 11 in the minor axis direction Z. As shown in Figure 3 , the sound production portion 11 can have an upper side surface US facing away from the external auditory canal 101 in the minor axis direction Z in the wearing state and a lower side surface LS facing the external auditory canal 101, and a rear side surface RS connecting the upper side surface US and the lower side surface LS, the rear side surface RS being located at one end of the major axis direction Y toward the back of the brain in the wearing state and at least partially located in the concha cavity 102. In some embodiments, the rear side surface RS of the sound production portion 11 is the free end FE of the sound production portion 11.

[0060] In some embodiments, the sound outlet hole 1111 can be provided on the inner side surface IS of the sound production portion 11, and the pressure relief hole 1112 can be provided on the upper side surface US of the sound production portion 11. In some embodiments, the centroid P point of the sound outlet hole 1111 can be used to represent the position of the sound outlet hole 1111, and the centroid Q point of the pressure relief hole 1112 can be used to represent the position of the pressure relief hole 1112, as shown in Figures 4-6 In some embodiments, the direction of the line PQ points to the ear canal opening of the user to improve the directivity of the sound production portion 11. In some embodiments, when the number of sound outlet holes 1111 is multiple, the P point can be understood as the centroid of the equivalent hole formed by the multiple sound outlet holes 1111; when the number of pressure relief holes 1112 is multiple, the Q point can be understood as the centroid of the equivalent hole formed by the multiple pressure relief holes 1112. In some embodiments, the position of the equivalent hole formed by multiple holes can be determined by sequentially connecting the center points of adjacent holes to form a polygon or a polyhedron, and the centroid of the polygon or polyhedron is the center point of the equivalent hole, which can be used to represent the position of the equivalent hole.

[0061] In some embodiments, when the diaphragm 112 vibrates, the front and back sides of the diaphragm 112 can respectively serve as a sound wave generation structure, generating sound waves with equal amplitude and opposite phase. In some embodiments, the sound waves with equal amplitude and opposite phase can be respectively radiated outward through the sound hole 1111 and the pressure relief hole 1112, forming a double sound source, which can interfere destructively at a spatial point (for example, the far field), thereby reducing the far-field leakage of the sound generating unit 11.

[0062] Figure 7 is an exemplary sound pressure level sound field distribution diagram of the sound generating unit according to some embodiments of the present specification. As shown in Figure 7 , in the medium-low frequency range (for example, 50Hz-1kHz), the sound field distribution of the sound generating unit 11 exhibits good double sound source directivity. That is, in the medium-low frequency range, the double sound source composed of the sound hole 1111 and the pressure relief hole 1112 of the sound generating unit 11 outputs sound waves with opposite phases, and the sound field forms a distribution mode of two lobe structures in space, on the two opposite directions of the double sound source connection line (i.e., the two opposite directions of the connection line PQ, Figure 7 , the 0° direction and the 180° direction), the sound pressure level is large, which is a high leakage area; while in the direction perpendicular to the double sound source connection line (i.e., the vertical direction of the connection line PQ, Figure 7 , the 90° direction and the 270° direction), the sound pressure level is small, which is a low leakage area.

[0063] In some embodiments, at least one of the one or more microphones is located on the first part 121 of the ear hook 12, for example Figure 4 , the A point or the C point position. And the connection line of the at least one microphone and the sound hole 1111 passes through the user's auricle, for example Figure 4 , the connection line AP and the connection line CP pass through the user's auricle. By separating the auricle between the sound hole 1111 and the microphone, the sound output by the sound generating unit 11 is blocked by the auricle, reducing the sound received by the microphone, reducing the influence of the sound generating unit 11 on the microphone, reducing the generation of echo, and at the same time the auricle can block the wind, reducing the wind noise received by the microphone, thereby improving the output effect of the sound generating device 10.

[0064] In some embodiments, the one or more microphones can include even only a first microphone (not shown in the figure), which can collect external environmental sound and generate a corresponding electrical signal, and based on the electrical signal processed by the processing circuit, the diaphragm 112 vibrates to generate sound.

[0065] In some embodiments, in order to reduce the impact of the sound outputted by the sound generating part 11 on the first microphone, to reduce the generation of echo, and to improve the output effect of the sound generating device 10, the sound outputted by the sound generating part 11 received by the first microphone can be reduced as much as possible. For example, the first microphone can be located at the position of point A.

[0066] In some embodiments, in addition to the method of setting an interval (auricle) between the first microphone and the sound generating part 11, the sound outputted by the sound hole 1111 and the pressure relief hole 1112 of the sound generating part 11 can be made to cancel each other at the first microphone, to reduce the sound outputted by the sound generating part 11 collected by the first microphone, to reduce the generation of echo, and to improve the output effect of the sound generating device 10. That is, the first microphone should be placed in the low sound leakage area of the sound generating part 11, for example, near the 90° direction and the 270° direction in Figure 7 In order to achieve this purpose, the distance from the first microphone to the centroid P point of the sound hole 1111 (i.e. the length of the line AP) and the distance from the first microphone to the centroid Q point of the pressure relief hole 1112 (i.e. the length of the line AQ) should be close or equal, so that the sound paths of the sound hole 1111 and the pressure relief hole 1112 to the first microphone are close, and the sound outputted by the sound hole 1111 and the pressure relief hole 1112 can be cancelled at the first microphone. In some embodiments, the ratio of the distance from the first microphone to the centroid P point of the sound hole 1111 (i.e. the length of the line AP) to the distance from the first microphone to the centroid Q point of the pressure relief hole 1112 (i.e. the length of the line AQ) is in the range of 0.8-1.2. In some embodiments, in order to further reduce the generation of echo, the difference between the distance from the first microphone to the centroid P point of the sound hole 1111 (i.e. the length of the line AP) and the distance from the first microphone to the centroid Q point of the pressure relief hole 1112 (i.e. the length of the line AQ) can be less than 5mm.

[0067] Please continue to refer to Figure 7, the sound field of the sound production part 11 forms a distribution mode of two lobe structures in space, and in two opposite directions of the double sound source connecting line (i.e. two opposite directions on the connecting line PQ), the sound pressure level is larger, which is a high leakage sound area; and in the direction perpendicular to the double sound source connecting line (i.e. the vertical direction of the connecting line PQ), the sound pressure level is smaller, which is a low leakage sound area. In order to reduce the sound collected by the first microphone from the sound production part 11, the first microphone can be arranged in the low leakage sound area, i.e. the first microphone can be arranged near the 90° direction or the 270° direction of the directivity of the sound field of the sound production part 11. In some embodiments, considering the structure and position of the ear hook 12 and the sound production part 11, when the sound outlet hole 1111 is located at the 0° direction, the pressure relief hole 1112 is located at the 180° direction, and the first part 121 is located on one side of the connecting line between the pressure relief hole 1112 and the sound outlet hole 1111 pointing to the 270° direction, the first microphone can be arranged near the 270° direction.

[0068] Figure 8A is a schematic view of the relative positions of the pressure relief hole, the sound outlet hole and the first microphone according to some embodiments of the present specification, Figure 8B is a schematic view of the relative positions of the pressure relief hole, the sound outlet hole and the first microphone from another perspective according to some embodiments of the present specification. Please refer to Figure 5 、 Figure 6 、 Figure 8A and Figure 8B , the connecting line PQ between the centroid P point of the sound outlet hole 1111 and the centroid Q point of the pressure relief hole 1112 has a midpoint M point, and the connecting line PQ has a vertical bisector plane S1 passing through the M point. Figure 8A is a perspective view from the free end FE of the sound production part 11 towards the connecting end of the sound production part 11 and the ear hook 12, Figure 8B shows the relative position of the first microphone (point A) and the vertical bisector plane S1.

[0069] In some embodiments, the angle between the connecting line between the midpoint M point and the first microphone (i.e. point A) and the vertical bisector plane S1 is -60°-60°, so that the first microphone is located in the low leakage sound area of the sound production part 11, reduces the sound collected by the first microphone from the sound production part 11, reduces the generation of echo, and improves the output effect of the sound production device 10. In some embodiments, in order to further reduce the echo, the angle between the connecting line between the midpoint M point and the first microphone (i.e. point A) and the vertical bisector plane S1 can be -30°-30°. In some embodiments, in order to further reduce the echo, the angle between the connecting line between the midpoint M point and the first microphone (i.e. point A) and the vertical bisector plane S1 can be -10°-10°.

[0070] In some embodiments, the sign of the angle between the line connecting the midpoint M and the first microphone (i.e., point A) and the vertical bisector plane S1 can indicate which side of the vertical bisector plane S1 the first microphone (i.e., point A) is located on. For example, referring to FIG. 11A, when the first microphone is located on the side of the vertical bisector plane S1 close to the pressure relief hole 1112 (i.e., point Q), the first microphone can correspond to point A1, the projection of point A1 on the vertical bisector plane S1 is point A1', and the angle between the line connecting the midpoint M and the first microphone (i.e., point A1) and the vertical bisector plane S1 (i.e., ∠A1MA1') can be positive. When the first microphone is located on the side of the vertical bisector plane S1 close to the sound outlet hole 1111 (i.e., point P), the first microphone can correspond to point A2, the projection of point A2 on the vertical bisector plane S1 is point A2', and the angle between the line connecting the midpoint M and the first microphone (i.e., point A2) and the vertical bisector plane S1 (i.e., ∠A2MA2') can be negative. Of course, in other embodiments, the angle between the line connecting the midpoint M and the first microphone and the vertical bisector plane S1 can be negative when the first microphone is located on the side of the vertical bisector plane S1 close to the pressure relief hole 1112, and the angle between the line connecting the midpoint M and the first microphone and the vertical bisector plane S1 can be positive when the first microphone is located on the side of the vertical bisector plane S1 close to the sound outlet hole 1111. Figure 8B When the first microphone is located on the side of the vertical bisector plane S1 close to the pressure relief hole 1112 (i.e., point Q), the first microphone can correspond to point A1, the projection of point A1 on the vertical bisector plane S1 is point A1', and the angle between the line connecting the midpoint M and the first microphone (i.e., point A1) and the vertical bisector plane S1 (i.e., ∠A1MA1') can be positive. When the first microphone is located on the side of the vertical bisector plane S1 close to the sound outlet hole 1111 (i.e., point P), the first microphone can correspond to point A2, the projection of point A2 on the vertical bisector plane S1 is point A2', and the angle between the line connecting the midpoint M and the first microphone (i.e., point A2) and the vertical bisector plane S1 (i.e., ∠A2MA2') can be negative. Of course, in other embodiments, the angle between the line connecting the midpoint M and the first microphone and the vertical bisector plane S1 can be negative when the first microphone is located on the side of the vertical bisector plane S1 close to the pressure relief hole 1112, and the angle between the line connecting the midpoint M and the first microphone and the vertical bisector plane S1 can be positive when the first microphone is located on the side of the vertical bisector plane S1 close to the sound outlet hole 1111.

[0071] In some embodiments, referring to FIG. 11A, Figure 4 Figure 5 Figure 6 In the wearing state, the free end FE of the sound generating portion 11 can extend into the concha cavity and abut against the concha cavity, the side of the ear hook 12 close to the user's head has a first contact point D that contacts the user's head, and the side of the ear hook 12 close to the sound generating portion 11 has a second contact point E that contacts the user's pinna, and the second contact point E can cooperate with the free end FE to achieve clamping of the sound generating device 10.

[0072] ​​In some embodiments, the absolute value of the difference between the distance from the first microphone (i.e. point A) to the first contact point D (i.e. the length of line AD) and the distance from the first microphone (i.e. point A) to the second contact point E (i.e. the length of line AE) is less than 1 mm. That is, the absolute value of the difference between the length of line AD and the length of line AE is less than 1 mm. With the above arrangement, the distance from the first microphone to the first contact point D and the second contact point E can be made similar, i.e. the first microphone can be located near the perpendicular bisector of the line connecting the first contact point D and the second contact point E, and at the same time, the first microphone is far away from the first contact point D and the second contact point E, so that the first microphone is far away from the user's head skin or pinna, to reduce the echo caused by the user's head skin or pinna interfering with the first microphone. In some embodiments, in order to further enable the first microphone to have a large distance from the first contact point D and the second contact point E at the same time, the first microphone can be arranged near the perpendicular bisector of the line connecting the first contact point D and the second contact point E, and the absolute value of the difference between the length of line AD and the length of line AE can be less than 0.8 mm. In some embodiments, in order to further enable the first microphone to be arranged near the perpendicular bisector of the line connecting the first contact point D and the second contact point E, the absolute value of the difference between the length of line AD and the length of line AE can be less than 0.5 mm.

[0073] Figure 9 is a cross-sectional view of the ear hook at the first microphone according to some embodiments of the present specification. Please refer to Figure 9 , D" point is the projection point of the first contact point D on the cross section, E" point is the projection point of the second contact point E on the cross section, and straight line L1 is the intersection of the perpendicular bisector of the line connecting the first contact point D and the second contact point E and the cross section. In some embodiments, straight line L1 can be the projection of the perpendicular bisector of the line connecting D" point and E" point on the cross section. As Figure 9 indicated, point A can be arranged near straight line L1, and correspondingly, the first microphone is arranged near the perpendicular bisector of the line connecting the first contact point D and the second contact point E.

[0074] Please refer to Figure 4 and Figure 5 , in some embodiments, the ear hook 12 has an outermost end H in the long axis direction Y of the sound generating portion 11. In some embodiments, the outer contour of the ear hook 12 has a tangent plane at the outermost end H which is perpendicular to the long axis direction Y, and the projection of the tangent plane on the user's sagittal axis is straight line L2. That is, straight line L2 is tangent to the ear hook 12 at H point.

[0075] In some embodiments, the outermost point H can also be determined by other methods. Exemplarily, a reference point (for example, the centroid of the sound generating part 11) can be taken as the origin, the long axis direction Y as the horizontal axis, and the other direction (for example, the short axis direction Z) as the vertical axis to establish a coordinate system, and the simulation curve of the outer contour of the ear hook 12 is introduced. Then, the point with the minimum horizontal coordinate on the simulation curve can correspond to the outermost point H.

[0076] In some embodiments, the distance (that is, the length of the line AH) between the first microphone (that is, point A) and the outermost point (that is, point H) can be not greater than 2 mm, so that the first microphone can be away from the inner contour of the ear hook 12 close to the user's pinna in the wearing state, so that the first microphone is away from the user's pinna, reduces the echo generated by the user's ear to the first microphone, and improves the output effect of the sound generating device 10. In some embodiments, in order to further make the first microphone away from the user's ear and reduce the interference of the user's ear to the first microphone, the distance (that is, the length of the line AH) between the first microphone and the outermost point can be not greater than 1.5 mm. In some embodiments, in order to further make the first microphone away from the user's head skin and reduce the echo, the distance (that is, the length of the line AH) between the first microphone and the outermost point can be not greater than 1 mm.

[0077] If the cross-sectional area of the ear hook 12 near point A is very small, the distance between point A and the back of the pinna or the head skin will be too small due to the abutment of the ear hook 12 with the back of the pinna or the head skin in the wearing state, which will affect the sound pickup effect of the first microphone. In order to avoid the above problems, the cross-sectional area of the ear hook 12 at the position of the first microphone should meet certain conditions. Please refer to Figure 9 , the first microphone is arranged at the first position (that is, point A) of the ear hook 12, and the cross-sectional area of the ear hook 12 at the first position is 75mm 2 ~250mm 2 , so that the ear hook 12 has sufficient structural strength while the first microphone can be away from the user's ear, reducing the echo and improving the output effect of the sound generating device 10. In some embodiments, in order to further ensure that the ear hook 12 has sufficient structural strength, the cross-sectional area of the ear hook 12 at the first position is 100mm 2 ~200mm 2 . In some embodiments, in order to make the first microphone further away from the user's ear and head skin, the cross-sectional area of the ear hook 12 at the first position can be 125mm 2 ~175mm 2 .

[0078] In some embodiments, the ear hook 12 can have a circular cross-sectional shape, i.e. the ear hook 12 can be a cylinder, so that the ear hook 12 is round and has no sharp edges, which can improve the wearing comfort of the ear hook 12. In some embodiments, in order to keep the first microphone away from the skin of the user's ear and head and reduce echo, the cross-sectional radius of the ear hook 12 at the first position can be 5mm to 7mm.

[0079] In some embodiments, the first microphone (i.e. point A) can be arranged in the accommodating cavity 123, which can protect the first microphone. In addition, the accommodating cavity 123 can have a larger size than other positions on the ear hook 12, which can keep the first microphone away from the skin of the user's ear and head, reduce echo, and improve the output effect of the sound production device 10.

[0080] In some embodiments, please refer to Figure 6 , the ear hook 12 includes an ear hook plane S2. In some embodiments, the ear hook plane S2 is a plane formed by the three outermost convex points on the ear hook 12, i.e. a plane that supports the ear hook 12 when the ear hook 12 is freely placed (i.e. not subject to external forces). For example, when the ear hook 12 is freely placed on a horizontal plane, the horizontal plane supports the ear hook 12, and the horizontal plane 12 can be regarded as the ear hook plane S2. In other embodiments, the ear hook plane S2 can also refer to a plane formed by a bisector that bisects or approximately bisects the ear hook 12 along its length extension direction. In the wearing state, the ear hook 12 can be approximately regarded as being in contact with the head, and the ear hook plane S2 can be approximately equivalent to the contact surface of the ear hook 12 with the user's head. The distance from the first microphone to the ear hook plane S2 can reflect the distance from the first microphone to the user's head. If the distance from the first microphone to the ear hook plane S2 is too small, the skin of the user's head can interfere with the first microphone, produce echo, and affect the output effect of the sound production device 10. In some embodiments, the distance from the first microphone (i.e. point A) to the ear hook plane S2 is greater than 10mm.

[0081] In some embodiments, in order to further reduce echo, the distance from the first microphone to the ear hook plane S2 can be greater than 12mm. In some embodiments, in order to further reduce echo, the distance from the first microphone to the ear hook plane S2 can be greater than 15mm.

[0082] In some embodiments, the one or more microphones can include a microphone array formed by at least two microphones, for example, including a second microphone (not shown in the figures) and a third microphone (not shown in the figures), which can respectively collect ambient sound and generate corresponding electrical signals. The processing circuit can identify and further process (e.g., amplify) the sound in a specific direction range (e.g., the direction indicated by the line connecting the two microphones) according to the electrical signals collected by the microphone array. In the embodiments of the present specification, B represents the position of the second microphone, and C represents the position of the third microphone, as shown in Figure 3 、 Figure 4 、 Figure 5

[0083] Please refer to Figure 3 、 Figure 4 and Figure 5 In some embodiments, the second microphone (i.e., point B) and the third microphone (i.e., point C) are both arranged on the ear hook 12, the second microphone (i.e., point B) is located in front of the third microphone (i.e., point C), and the line (i.e., line CP) connecting the third microphone (i.e., point C) and the sound outlet hole 1111 (i.e., point P) passes through the user's auricle, so that the sound output by the sound generating part 11 is blocked by the auricle, reducing the sound output by the sound generating part 11 received by the third microphone, reducing the generation of echo, and at the same time the auricle can block the wind, reducing the wind noise received by the third microphone, thereby improving the output effect of the sound generating device 10. Wherein, the front side refers to the direction from the back of the user's head to the user's face.

[0084] In order to reduce the sound output by the sound generating part 11 collected by the second microphone and the third microphone to reduce echo, the sound generating part 11 can be designed to have a directional sound field, that is, to have a larger output in the direction from the sound generating part 11 to the user's ear canal, and to have a smaller sound leakage in other directions. For example, the sound field of the sound generating part 11 can have a heart-shaped directivity, and the directivity direction is the direction from the sound generating part 11 to the user's ear canal (e.g., the direction from the centroid Q of the pressure relief hole 1112 to the centroid P of the sound outlet hole 1111).

[0085] Figure 10 is an exemplary internal structure schematic diagram of the sound generating part according to some embodiments of the present specification. Please refer to Figure 10 ​In some embodiments, the sound generating portion 12 can include a first diaphragm 112-1 and a second diaphragm 112-2, the first diaphragm 112-1 outputs sound through a sound hole 1111, and the second diaphragm 112-2 outputs sound through a pressure relief hole 1112. In some embodiments, the processing circuit can process the electrical signals generated by the second microphone and the third microphone respectively, and the first diaphragm 112-1 and the second diaphragm 112-2 can generate sound respectively according to the processed electrical signals. For example, the processed electrical signal of the second microphone can be used as the excitation of the first diaphragm 112-1, so that the first diaphragm 112-1 generates sound corresponding to the electrical signal output by the second microphone; the processed electrical signal of the third microphone can be used as the excitation of the second diaphragm 112-2, so that the second diaphragm 112-2 generates sound corresponding to the electrical signal output by the third microphone.

[0086] Figure 11 is a schematic diagram of the directivity of the sound generating portion according to some embodiments of the present specification; Figure 12 is a schematic diagram of the sound pressure level sound field distribution of the sound generating portion according to some embodiments of the present specification.

[0087] Please refer to Figure 11 and Figure 12 In some embodiments, Figure 11 the sound generating portion 11 is in a wearing state, wherein P point represents the sound hole 1111 through which the first diaphragm 112-1 outputs sound, and Q point represents the pressure relief hole 1112 through which the second diaphragm 112-2 outputs sound. In some embodiments, the sound hole 1111 and the pressure relief hole 1112 radiate sound in the far field of the sound generating device 10 with directivity, and the absolute value of the difference between the sound pressure levels of the sound generating device 10 at two far field positions in a specific direction and the opposite direction in a target frequency range is not less than 6dB. Wherein, the line connecting the sound hole 1111 and the pressure relief hole 1112 (i.e. the line QP) defines the specific direction.

[0088] In some embodiments, the directivity of the far-field radiation of the sound production device 10 refers to that the output sound direction of the sound production device 10 is within a specified direction range, i.e., the far-field radiation of the sound production device 10 within the specified direction range is significantly greater than that outside the specified direction range. In some embodiments, in the wearing state, the direction K1 (i.e., the direction from the Q point to the P point) and the directions (e.g., the direction K2, the direction K3) near the direction K1, which are from the pressure relief hole 1112 (i.e., the Q point) to the sound outlet hole 1111 (i.e., the P point), are the directions pointing to the ear canal entrance of the user's external ear canal. That is, in the wearing state, the sound outlet hole 1111 is closer to the ear canal entrance of the user's ear. The direction K1' and the directions (e.g., the direction K2', the direction K3') near the direction K1', which are from the sound outlet hole 1111 (i.e., the P point) to the pressure relief hole 1112 (i.e., the Q point), are the directions in which the sound production part 11 faces away from the ear canal entrance of the user. In some embodiments, in the wearing state and / or the non-wearing state, the direction K1 (i.e., the direction from the Q point to the P point) and the directions near the direction K1, which are from the pressure relief hole 1112 (i.e., the Q point) to the sound outlet hole 1111 (i.e., the P point), can constitute the above-mentioned specified direction range. The far-field radiation of the sound production device 10 in the direction K1 and the directions near the direction K1 is significantly greater than that in other direction ranges (e.g., the direction range perpendicular to the direction K1 and the directions near the direction K1, the direction range opposite to the direction K1 and the directions near the direction K1, etc.). In some embodiments, the directivity of the sound production device 10 can be manifested as that the absolute value of the difference between the sound pressure levels at two corresponding far-field positions in a specific direction and the opposite direction of the sound production device 10 is not less than 6 dB. In the wearing state, the specific direction can be the direction in which the sound production device 10 (the sound production part 11) faces away from the ear canal entrance of the user, and the opposite direction can be the direction in which the sound production device 10 (the sound production part 11) points to the external ear canal of the user. In some embodiments, the specific direction can be the direction K1' and the directions near the direction K1', which are from the sound outlet hole 1111 (i.e., the P point) to the pressure relief hole 1112 (i.e., the Q point); the opposite direction of the specific direction can be the direction K1 (i.e., the direction from the Q point to the P point) and the directions near the direction K1, which are from the pressure relief hole 1112 (i.e., the Q point) to the sound outlet hole 1111 (i.e., the P point). In some embodiments, the directions near the direction K1' can be understood as the directions having an included angle of less than 60° with the direction K1'. It should be noted that, for the purpose of conveniently understanding the directivity, only the sound outlet hole 1111 and the pressure relief hole 1112 are exemplarily described herein. When the sound production part 11 of the sound production device 10 has more different hole parts, the P point can be understood as the centroid of the equivalent hole part formed by the plurality of sound outlet holes 1111, and the Q point can be understood as the centroid of the equivalent hole part formed by the plurality of pressure relief holes 1112.

[0089] In some embodiments, the first diaphragm 112-1 and the second diaphragm 112-2 are not synchronized in vibration, and the first sound generated by the first diaphragm 112-1 and the second sound generated by the second diaphragm 112-2 have a phase difference, so that the first sound and the second sound can be superimposed and enhanced on the side of the sound generating part 11 facing the user's external auditory canal, and superimposed and cancelled on the side of the sound generating part 11 away from the user's external auditory canal, so that the sound field of the sound generating part 11 (sound generating device 10) has a cardioid directivity.

[0090] In some embodiments, the far-field radiation of the sound generating device 10 has a cardioid directivity, which can be manifested as: in a specified direction range, the absolute value of the sound pressure level difference of the far-field radiation sound of the sound generating device 10 in at least one pair of opposite directions is not less than 6dB, so that the user's ear canal can receive a larger volume, and the user can obtain a clear listening effect. Among them, the at least one pair of opposite directions can respectively fall within the above-mentioned specified direction range and its opposite direction range. In some embodiments, the at least one pair of opposite directions can include the above-mentioned specific direction and its opposite direction. That is, the above-mentioned specific direction and its opposite direction can be respectively included in the above-mentioned specified direction range and its opposite direction range. In some embodiments, the above-mentioned at least one pair of opposite directions includes a pair of opposite directions corresponding to the line connecting the sound outlet hole 1111 (i.e. P point) and the pressure relief hole 1112 (i.e. Q point). The cardioid directivity of the sound generating device 10 can be manifested as the sound field intensity of a pair of opposite or nearly opposite directions in the above-mentioned specified direction range and its opposite direction range has a large difference. Exemplarily, the above-mentioned pair of opposite or nearly opposite directions can refer to one direction near the direction K1' pointing from the sound outlet hole 1111 (i.e. P point) to the pressure relief hole 1112 (i.e. Q point), and the other direction near the direction K1 pointing from the pressure relief hole 1112 (i.e. Q point) to the sound outlet hole 1111 (i.e. P point). For example, the direction K1' can be opposite or nearly opposite to the direction K1, the direction K2, and the direction K3.

[0091] In some embodiments, in order to improve the listening effect of the user, the sound generating device 10 can have a cardioid directivity in the frequency range sensitive to the human ear, such as near 3kHz or near 3.5kHz. The target frequency range can be 1kHz-4kHz.

[0092] Please refer to Figure 11 and Figure 12 In the cardioid directivity of the sound field of the sound generating part 11, the maximum point of the sound field is near the 0° direction, and the minimum point of the sound field is near the 180° direction. In some embodiments, the line connecting the centroid of the sound outlet hole 1111 (i.e. P point) and the centroid of the pressure relief hole 1112 (i.e. Q point) (i.e. line PQ) is located on the straight line of the 0° direction and the 180° direction.

[0093] To reduce the sound outputted by the sound production part 11 and collected by the first microphone and the third microphone, and to reduce the generation of echo, the second microphone and the third microphone can be arranged in a low leakage area, i.e., the second microphone and the third microphone can be arranged near the 180° direction of the cardioid directivity of the sound field of the sound production part 11. In some embodiments, considering the structure and position of the ear hook 12 and the sound production part 11, the second microphone (i.e., point B) and the third microphone (i.e., point C) are arranged on the ear hook 12 on the side of the sound production part 11 pointing from the sound hole 1111 (i.e., point P) to the pressure relief hole 1112 (i.e., point Q), i.e., the point B and the point C are arranged on the ear hook 12 on the upper side of the sound production part 11. In some embodiments, the included angle (i.e., ∠BMQ) between the line connecting the second microphone (i.e., point B) and the midpoint M and the line (i.e., line PQ) connecting the centroid of the sound hole 1111 (i.e., point P) and the centroid of the pressure relief hole 1112 (i.e., point Q) is 0°-30°. In some embodiments, the included angle (i.e., ∠CMQ) between the line connecting the third microphone (i.e., point C) and the midpoint M and the line (i.e., line PQ) connecting the centroid of the sound hole 1111 (i.e., point P) and the centroid of the pressure relief hole 1112 (i.e., point Q) is -30°-0°.

[0094] In some embodiments, to further reduce echo, the included angle (i.e., ∠BMQ) between the line connecting the second microphone and the midpoint M and the line connecting the centroid of the sound hole 1111 and the centroid of the pressure relief hole 1112 can be 0°-20°. In some embodiments, to further reduce echo, the included angle (i.e., ∠BMQ) between the line connecting the second microphone and the midpoint M and the line connecting the centroid of the sound hole 1111 and the centroid of the pressure relief hole 1112 can be 0°-10°.

[0095] In some embodiments, to further reduce echo, the included angle (i.e., ∠CMQ) between the line connecting the third microphone and the midpoint M and the line connecting the centroid of the sound hole 1111 and the centroid of the pressure relief hole 1112 can be -20°-0°. In some embodiments, to further reduce echo, the included angle (i.e., ∠CMQ) between the line connecting the third microphone and the midpoint M and the line connecting the centroid of the sound hole 1111 and the centroid of the pressure relief hole 1112 can be -10°-0°.

[0096] In some embodiments, the positive and negative values of the above two angles can represent which side of the line (i.e., line PQ) connecting the centroid of the sound hole 1111 and the centroid of the pressure relief hole 1112 the corresponding microphone is located. Specifically, please refer to Figure 4When the second microphone (i.e., point B) is located at a side of the line PQ pointing to the user's face (e.g., a side away from the free end FE), the angle between the line connecting the second microphone and the midpoint M and the line connecting the centroid of the sound outlet 1111 and the centroid of the pressure relief hole 1112 can be positive; when the third microphone (i.e., point C) is located at a side of the line PQ pointing to the back of the user's head (e.g., a side toward the free end FE), the angle between the line connecting the third microphone and the midpoint M and the line connecting the centroid of the sound outlet 1111 and the centroid of the pressure relief hole 1112 can be negative. Of course, in other embodiments, the second microphone can be located at a side of the line PQ pointing to the back of the user's head when the angle between the line connecting the second microphone and the midpoint M and the line connecting the centroid of the sound outlet 1111 and the centroid of the pressure relief hole 1112 is negative, and the third microphone can be located at a side of the line PQ pointing to the user's face when the angle between the line connecting the third microphone and the midpoint M and the line connecting the centroid of the sound outlet 1111 and the centroid of the pressure relief hole 1112 is positive.

[0097] It should be noted that the second microphone (i.e., point B), the third microphone (i.e., point C), the centroid P of the sound outlet 1111, and the centroid Q of the pressure relief hole 1112 can be coplanar or not coplanar, and the angle ∠BMQ corresponding to the second microphone and the angle ∠CMQ corresponding to the third microphone can be measured in different planes, respectively.

[0098] In addition, please refer to Figure 4 and Figure 5 By arranging the second microphone and the third microphone on both sides of the line connecting the centroid of the sound outlet 1111 and the centroid of the pressure relief hole 1112, the line connecting the second microphone and the third microphone can be directed to the front of the user, so as to better collect the sound emitted by the user's conversation object.

[0099] Please refer to Figure 5 The projection of the ear hook 12 on the sagittal plane of the user includes an outer contour, i.e., the curve J1J2, and an inner contour, i.e., the curve J3J4. Among them, J1 is the intersection point of the outer contour of the ear hook 12 and the sound generating part 11, J3 is the intersection point of the inner contour of the ear hook 12 and the sound generating part 11, J2 is the end point of the outer contour of the ear hook 12 near one end of the accommodation bin 123 close to the free end of the ear hook 12, and J4 is the end point of the inner contour of the ear hook 12 near one end of the accommodation bin 123 close to the free end of the ear hook 12. In some embodiments, in the short axis direction Z of the projection of the sound generating part 11 on the sagittal plane, the outer contour curve J1J2 can have an extreme point N. In some embodiments, a reference coordinate system can be established with a reference point (e.g., the centroid of the sound generating part 11) as the origin, the long axis direction Y as the horizontal axis, and the short axis direction Z as the vertical axis, and the outer contour curve J1J2 of the ear hook 12 is analyzed in the reference coordinate system, so as to determine the extreme point N of the outer contour curve J1J2 of the ear hook 12 in the short axis direction Z.

[0100] In some embodiments, the projection B' of the second microphone on the user's sagittal plane and the projection C' of the third microphone on the user's sagittal plane can be located on two sides of the extreme point N of the outer contour of the ear hook 12 respectively, so that the line connecting the second microphone and the third microphone can point to the front of the user, so as to better collect the sound emitted by the conversation object in front of the user.

[0101] In some embodiments, the second microphone (i.e., point B) can be located on the front side of the user's pinna. That is, the second microphone is located on the side of the user's pinna facing the user's face, so that the second microphone is not blocked by the user's pinna (as shown in Figure 4 ), so as to improve the pickup effect of the second microphone on the sound of the external environment. In addition, the location of the second microphone on the front side of the user's pinna also allows the second microphone to be close to the user's face, so as to better collect the sound emitted by the conversation object in front of the user.

[0102] In some embodiments, in the wearing state, the projection B' of the second microphone on the user's sagittal plane is located outside the projection of the user's pinna on the sagittal plane, so that the second microphone is not blocked by the user's pinna, so as to improve the pickup effect of the second microphone on the sound of the external environment.

[0103] Since the second microphone is located on the front side of the user's pinna, the second microphone (i.e., point B) and the center P of the sound hole 1111 can not pass through the pinna, and there is no pinna blocking between the sound hole 1111 and the second microphone, so the sound output by the sound hole 1111 can be directly transmitted to the second microphone. In order to minimize the sound received by the second microphone from the sound emitting part 11, the second microphone should be arranged in the low sound leakage area of the sound field of the sound emitting part 11.

[0104] Since the line connecting the third microphone and the center P of the sound hole 1111 passes through the pinna, the sound output by the sound emitting part 11 is blocked by the pinna, and the third microphone receives less sound output by the sound emitting part 11, so it is feasible whether the third microphone is arranged in the low sound leakage area of the sound field of the sound emitting part 11.

[0105] In some embodiments, the angle between the line connecting the second microphone and the midpoint M and the line connecting the center of the sound hole 1111 and the center of the pressure relief hole 1112 (i.e., ∠BMQ) can be greater than the angle between the line connecting the third microphone and the midpoint M and the line connecting the center of the sound hole 1111 and the center of the pressure relief hole 1112 (i.e., ∠CMQ), as shown in Figure 4 , so that the second microphone is arranged in the low sound leakage area of the sound field of the sound emitting part 11, and the third microphone can be arranged in the area with large sound leakage of the sound field of the sound emitting part 11.

[0106] In some embodiments, please refer to Figure 4In the wearing state, the angle a between the line connecting the second microphone and the third microphone (i.e., the line BC) and the sagittal axis of the user can be -30°-30°, so that the line connecting the second microphone and the third microphone points to the front of the user, to better collect the sound emitted by the conversation object located in front of the user. In some embodiments, to improve the collection effect of the sound emitted by the user conversation object by the second microphone and the third microphone, the angle a between the line connecting the second microphone and the third microphone (i.e., the line BC) and the sagittal axis of the user can be -10°-10°. In some embodiments, to further improve the collection effect of the sound output by the sound source located in front of the user by the second microphone and the third microphone, the angle a between the line connecting the second microphone and the third microphone (i.e., the line BC) and the sagittal axis of the user can be -5°-5°.

[0107] In some embodiments, the positive or negative value of the angle a between the line connecting the second microphone and the third microphone (i.e., the line BC) and the sagittal axis of the user can represent the orientation of the line CB connecting the second microphone and the third microphone. For example, when the value of the angle a is positive, the direction from the point C to the point B is the upper front, i.e., the direction pointing to the top of the user's head and the front of the user; when the value of the angle a is negative, the direction from the point C to the point B is the lower front, i.e., the direction pointing to the user's mouth and the front of the user.

[0108] In some embodiments, please refer to Figure 2 and Figure 4 , the long axis direction Y of the sound emitting part 11 and the sagittal axis of the user can be parallel or inclined or perpendicular. The angle β between the line connecting the second microphone and the third microphone (i.e., the line CB) and the long axis direction Y of the sound emitting part 11 can also reflect the directivity of the line connecting the second microphone and the third microphone (i.e., the line CB). In some embodiments, the angle β between the line connecting the second microphone and the third microphone (i.e., the line CB) and the long axis direction Y of the sound emitting part 11 is -30°-30°, so that the line connecting the second microphone and the third microphone points to the front of the user, to better collect the sound emitted by the conversation object located in front of the user. It should be noted that when the sound emitting part 11 is in different position states (corresponding to different inclination angles γ of the long axis direction Y of the sound emitting part 11 relative to the sagittal axis), the value range of the angle β between the line connecting the second microphone and the third microphone (i.e., the line CB) and the long axis direction Y of the sound emitting part 11 can be different. For example, when the sound emitting part 11 is in the position as shown in the sound emitting part 11C in Figure 2 , the long axis direction Y is parallel to the sagittal axis, and at this time the angle β between the line connecting the second microphone and the third microphone (i.e., the line CB) and the long axis direction Y of the sound emitting part 11 can be -30°-30°; when the sound emitting part 11 is in the position as shown in the sound emitting part 11B in Figure 2When the sound emitting part 11A is in the position shown in FIG. 1, the long axis direction Y is perpendicular to the sagittal axis, and the angle β between the line connecting the second microphone and the third microphone (i.e., the line CB) and the long axis direction Y of the sound emitting part 11 can be 60°-120°. Specifically, the angle β between the line connecting the second microphone and the third microphone (i.e., the line CB) and the long axis direction Y of the sound emitting part 11 depends on the angle γ of the long axis direction Y relative to the sagittal axis. When γ is positive, it indicates that the long axis direction Y is inclined upward relative to the sagittal axis, and in this case, the value of β is the angle α minus the angle γ, where the angle α is -30°-30°. When γ is negative, it indicates that the long axis direction Y is inclined downward relative to the sagittal axis, and in this case, the value of β is the angle α plus the angle γ, where the angle α is -30°-30°.

[0109] In some embodiments, the distance between the second microphone and the third microphone (i.e., the length of the line BC) can be 5 mm-20 mm. This distance allows the sound emitted by a conversation object in front of the user to reach the second microphone and the third microphone at different times, resulting in a large phase difference between the sound signals collected by the second microphone and the third microphone while the amplitude difference is small, so as to facilitate differential processing and improve the collection effect of the sound emitted by the conversation object in front of the user.

[0110] If the distance between the second microphone and the third microphone is too small, the time difference between the sound signals received by the second microphone and the third microphone will be too small, and the phase difference between the sound signals received by the second microphone and the third microphone will be small, resulting in poor differential processing effect and unsatisfactory collection effect. If the distance between the second microphone and the third microphone is too large, the second microphone and the third microphone will be isolated by the pinna, resulting in a large phase difference and a large amplitude difference between the sound signals collected by the second microphone and the third microphone, which makes differential processing difficult and results in poor collection effect.

[0111] In some embodiments, in order to further reduce the amplitude difference between the sound signals collected by the second microphone and the third microphone, the distance between the second microphone and the third microphone (i.e., the length of the line BC) can be 10 mm-15 mm. In some embodiments, in order to further increase the phase difference between the sound signals collected by the second microphone and the third microphone, the distance between the second microphone and the third microphone (i.e., the length of the line BC) can be 12 mm-13 mm.

[0112] In some embodiments, please refer to Figure 5, the projection B' of the second microphone on the sagittal plane and the projection C' of the third microphone on the sagittal plane are both arranged close to the outer contour (i.e. curve J1J2) compared to the inner contour (i.e. curve J3J4) of the ear hook 12. That is, on the ear hook 12, the second microphone and the third microphone are both arranged on the side of the ear hook 12 away from the user's pinna, so that the second microphone and the third microphone can be away from the user's head skin, reduce the interference of the user's skin, reduce echo, and improve the output effect of the sound generating device 10.

[0113] The foregoing detailed description has set forth various embodiments of the application via the use of specific terminology. As such, it is to be understood that the term "include" or "comprising" or variations thereof herein, are intended to cover the various embodiments of the application. As such, the term "include" or "comprising" or variations thereof are intended to be inclusive of the various features, structures, or characteristics described herein. As such, the description herein is not intended to be limited to the specific embodiments described, but rather only to serve as illustrative examples of the various embodiments of the application. The scope of the application is to be interpreted in the broadest sense and to encompass modifications, improvements, and equivalents thereof.

[0114] Also, the use of "including", "comprising", "having" and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless specified otherwise, like reference numerals designate corresponding parts throughout the specification. Notably, and for purposes of interpretation of the specification and of the claims which follow, all references listed in the Background section hereof, as well as all references cited in the specification, are hereby incorporated by reference.

[0115] As such, it should be noted that a variety of features, structures, and characteristics described herein can be combined in any manner to form additional embodiments of the present application. As such, the foregoing detailed description is not to be understood as limiting the application, as the application is capable of numerous rearrangements and / or modifications, and changes of structure and function of elements illustrated in the specific disclosure. Rather, as noted above, the embodiments of the application are capable of considerable modification, alteration, and / or equivalents.

[0116] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit reservation. Although the numerical ranges and parameters used to confirm their breadth of scope in some embodiments of this application are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0117] For each patent, patent application, patent application publication, and other material such as articles, books, specifications, publications, and documents referenced in this application, the entire contents of that patent are incorporated herein by reference. This excludes historical application documents that are inconsistent with or conflict with the content of this application, as well as documents that limit the broadest scope of the claims in this application (currently or subsequently appended to this application). It should be noted that if there are any inconsistencies or conflicts between the descriptions, definitions, and / or terminology used in the supplementary materials of this application and the content of this application, the descriptions, definitions, and / or terminology used in this application shall prevail. Finally, it should be understood that the embodiments described in this application are merely illustrative of the principles of the embodiments of this application. Other modifications may also fall within the scope of this application. Therefore, alternative configurations of the embodiments of this application are considered as examples and not limitations, and are regarded as consistent with the teachings of this application. Accordingly, the embodiments of this application are not limited to the embodiments explicitly described and illustrated in this application.

Claims

1. A sound producing device, characterized by, The application relates to a sound production device, comprising: a sound production unit, comprising a shell and a diaphragm arranged in the shell, two sides of the diaphragm being respectively provided with a front cavity and a rear cavity in the shell, the front cavity being acoustically coupled with a sound outlet hole arranged on the shell, the sound outlet hole being arranged towards an external ear canal of a user, and the rear cavity being acoustically coupled with a pressure relief hole arranged on the shell; an ear hook, comprising a first part and a second part, the first part being hung between an auricle of the user and a head of the user, and the second part extending to a side of the auricle of the user away from the head of the user and being connected with the sound production unit, so as to place the sound production unit near the external ear canal of the user without blocking an ear canal opening of the user; one or more microphones arranged on the ear hook and configured to collect ambient sound to generate corresponding electrical signals; a processing circuit for amplifying the electrical signals generated by the microphones and sending the processed electrical signals to the sound production unit, the sound production unit generating sound under the action of the electrical signals; wherein at least one of the one or more microphones is located on the first part of the ear hook, and a line connecting the at least one microphone and the sound outlet hole passes through the auricle of the user.

2. The sound production device of claim 1, wherein The one or more microphones comprise a first microphone, and a ratio of a distance from the first microphone to a centroid of the sound outlet hole to a distance from the first microphone to a centroid of the pressure relief hole ranges from 0.8 to 1.

2.

3. The generating device of claim 1, wherein The one or more microphones comprise a first microphone, and a line connecting a centroid of the sound outlet hole and a centroid of the pressure relief hole has a midpoint and a vertical bisector plane defined through the midpoint, an included angle between a line connecting the midpoint and the first microphone and the vertical bisector plane ranges from -60 degrees to 60 degrees.

4. The sound production device of claim 1, wherein The one or more microphones comprise a first microphone, the first part comprises a first contact point in contact with the head of the user and a second contact point in contact with the auricle of the user, and an absolute value of a difference between a distance from the first microphone to the first contact point and a distance from the first microphone to the second contact point is less than 1 mm.

5. The sound production device of claim 1, wherein The one or more microphones comprise a first microphone, and the ear hook has an outermost end in a long axis direction of the sound production unit, the outermost end being a tangent point of an outer tangent plane of an outer contour of the ear hook and a direction perpendicular to the long axis direction of the sound production unit, and a distance from the first microphone to the outermost end is not greater than 2 mm.

6. The sound production device of claim 1, wherein The one or more microphones include a first microphone disposed at a first position of the earhook, the earhook having a cross-sectional area of 75mm 2 ~ 250mm 2 at the first position.

7. The sound production device of claim 1, wherein The one or more microphones comprise a first microphone, and the first part comprises a containing bin, and the processing circuit and the first microphone are arranged in the containing bin.

8. The sound production device of claim 1, wherein, The one or more microphones comprise a first microphone, and a distance from the first microphone to an ear hook plane of the ear hook is greater than 10 mm.

9. The sound production device of claim 1, wherein, The one or more microphones comprise a second microphone and a third microphone, the second microphone and the third microphone are arranged on the ear hook, the second microphone is located in front of the third microphone, and a line connecting the third microphone and the sound outlet hole passes through the auricle of the user.

10. The sound production device of claim 9, wherein, The projection of the ear hook on the sagittal plane of the user includes an outer contour, the outer contour has an extreme point in the direction of the short axis of the projection of the sound production part on the sagittal plane, and the projections of the second microphone and the third microphone on the sagittal plane are located on the two sides of the extreme point, respectively.

11. The sound production device of claim 9, wherein, The second microphone is located in front of the pinna of the user.

12. The sound production device of claim 9, wherein, In the wearing state, the projection of the second microphone on the sagittal plane of the user is located outside the projection of the pinna of the user on the sagittal plane of the user.

13. The sound production device of claim 9, wherein, In the wearing state, the angle between the line connecting the second microphone and the third microphone and the sagittal axis of the user is -10°-10°.

14. The sound production device of claim 9, wherein, The angle between the line connecting the second microphone and the third microphone and the direction of the long axis of the sound production part is -30°-30°.

15. The sound production device of claim 9, wherein, The distance between the second microphone and the third microphone is 5mm-20mm.

16. The sound production device of claim 9, wherein, The projection of the ear hook on the sagittal plane of the user includes an outer contour and an inner contour, and compared with the inner contour, the projections of the second microphone and the third microphone on the sagittal plane are arranged close to the outer contour.

17. The sound production device of claim 9, wherein, The sound hole and the pressure relief hole present directivity to the sound radiated by the sound production device to the far field, and the absolute value of the difference between the sound pressure levels of the sound production device at two far field positions in a specific direction and the opposite direction of the specific direction in a target frequency range is not less than 6dB, and the line connecting the sound hole and the pressure relief hole defines the specific direction.

18. The sound production device of claim 17, wherein, The line connecting the centroid of the sound hole and the centroid of the pressure relief hole has a midpoint, the angle between the line connecting the second microphone and the midpoint and the line connecting the centroid of the sound hole and the centroid of the pressure relief hole is 0°-30°.

19. The sound production device of claim 17, wherein, The line connecting the centroid of the sound hole and the centroid of the pressure relief hole has a midpoint, the angle between the line connecting the third microphone and the midpoint and the line connecting the centroid of the sound hole and the centroid of the pressure relief hole is -30°-0°.

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