Sound production device

Abstract

The embodiment of the utility model 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 invention relates to the field of acoustic technology, and in particular to a sound-generating device. Background Art

[0002] A sound device with an assistive hearing function (such as a hearing aid) is a tool, device, apparatus, and instrument that can be used by people with hearing disabilities to improve hearing impairment and thereby improve their ability to communicate with others. Current hearing aid types mainly include behind-the-ear hearing aids and in-ear hearing aids. The wearing comfort and output effect of a sound device (such as a hearing aid) will greatly affect the user's choice and experience.

[0003] Therefore, it is necessary to provide a sound-generating device to improve the wearing comfort of the user and the output effect of the sound-generating device. Utility Model Content

[0004] One of the embodiments of the present specification provides a sound-generating device, which includes: a sound-generating part, including a shell and a diaphragm arranged in the shell, in which a front cavity and a rear cavity are respectively arranged on both sides of the diaphragm, the front cavity is acoustically coupled with a sound outlet hole arranged on the shell, the sound outlet hole is arranged toward the external auditory canal of a user, and the rear cavity is acoustically coupled with a pressure relief hole arranged in the shell; an ear hook, including a first part and a second part, the first part is hung between the user's auricle and the user's head, and the second part extends to the side of the user's auricle away from the user's head and is connected to the sound-generating part, and is used to place the sound-generating part near the user's external auditory canal but not block the user's ear canal opening; one or more microphones are arranged on the ear hook and are configured to collect ambient sound to generate corresponding electrical signals; a processing circuit is used to amplify the electrical signal generated by the microphone and send the processed electrical signal to the sound-generating part, and the sound-generating part generates sound under the action of the electrical signal; wherein at least one of the one or more microphones is located in the first part of the ear hook, and the connection line between at least one microphone and the sound outlet hole passes through the user's auricle. By placing the auricle between the sound outlet and the microphone, the sound output by the sound-emitting part is blocked by the auricle, thereby reducing the sound output by the sound-emitting part received by the microphone, reducing the impact of the sound output by the sound-emitting part on the microphone, and reducing the generation of echoes. At the same time, the auricle can block the wind and reduce the wind noise received by the microphone, thereby improving the output effect of the sound-emitting device.

[0005] In some embodiments, the one or more microphones include a first microphone, and the ratio of the distance from the first microphone to the centroid of the sound outlet to the distance from the first microphone to the centroid of the pressure relief hole can be in the range of 0.8 to 1.2. This allows the sound paths from the sound outlet and the pressure relief hole to the first microphone to be close, so that the sounds output by the sound outlet and the pressure relief hole can be cancelled at the first microphone, thereby reducing the sound output by the sound-emitting part collected by the first microphone, thereby reducing the generation of echoes and improving the output effect of the sound-emitting device.

[0006] In some embodiments, the one or more microphones include a first microphone, the line connecting the centroid of the sound outlet and the centroid of the pressure relief hole has a midpoint and a perpendicular bisector plane defining the midpoint, and the angle between the line connecting the midpoint and the first microphone and the perpendicular bisector plane is -60° to 60°. In this way, the first microphone can be located in a low sound leakage area of ​​the sound-emitting part, reducing the sound of the sound-emitting part collected by the first microphone, reducing the generation of echoes, and improving the output effect of the sound-emitting 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 auricle, and the absolute value of the difference between the distance from the first microphone to the first contact point and the distance from the first microphone to the second contact point is less than 1 mm. In this way, the distances from the first microphone to the first contact point and the second contact point can be close, that is, the first microphone can be located near the perpendicular bisector of the line connecting the first contact point and the second contact point. At this time, the first microphone is far away from the first contact point and the second contact point at the same time, so that the first microphone is far away from the user's head skin or auricle, so as to reduce the echo caused by the user's head skin or auricle interfering with the first microphone.

[0008] In some embodiments, the one or more microphones include a first microphone, and the ear hook has an outermost end in the long axis direction of the sound-emitting part, the outermost end is the tangent point of the outer tangent plane on the outer contour of the ear hook that is perpendicular to the long axis direction of the sound-emitting part, and the distance between the first microphone and the outermost end is no more than 2 mm. In this way, the first microphone can be away from the inner contour of the ear hook close to the user's auricle when worn, so that the first microphone is away from the user's auricle, reducing the echo caused by the user's ear interfering with the first microphone, and improving the output effect of the sound-emitting device.

[0009] In some embodiments, the one or more microphones include a first microphone, the first microphone is disposed at a first position of the ear hook, and the cross-sectional area of ​​the ear hook at the first position is 75 mm 2 ~250mm 2 In this way, the ear hook can have sufficient structural strength while allowing a greater distance between the first microphone and the user's ear, thereby reducing echo and improving the output effect of the sound-generating device.

[0010] In some embodiments, the one or more microphones include a first microphone, and the first portion of the ear hook includes a storage compartment, and the processing circuit and the first microphone are both disposed in the storage compartment. The storage compartment can protect the first microphone and the processing circuit. Compared with the size of other locations on the ear hook, the size of the storage compartment is larger, so that the first microphone can be kept away from the user's ear and head skin, reducing echo and improving the output effect of the sound device.

[0011] In some embodiments, the one or more microphones include a first microphone, and the distance between the first microphone and the earhook plane of the earhook is greater than 10 mm. Avoiding a distance between the first microphone and the earhook plane that is too small can prevent the user's head skin from interfering with the first microphone and generating echoes, thereby improving the output effect of the sound-generating device.

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

[0013] In some embodiments, the projection of the ear hook on the sagittal plane of the user includes an outer contour, and in the short axis direction of the projection of the sound-emitting part on the sagittal plane, the outer contour has an extreme point, and the projection of the second microphone on the sagittal plane and the projection of the third microphone on the sagittal plane are respectively located on both sides of the extreme point. In this way, the line connecting the second microphone and the third microphone can point to the front of the user to better collect the sound emitted by the user's conversation partner.

[0014] In some embodiments, the second microphone is located in front of the user's auricle. This allows the second microphone to not be blocked by the user's auricle, thereby improving the second microphone's ability to pick up ambient sound. In addition, the second microphone can be placed close to the user's face to better capture the sound of the person in front of the user.

[0015] In some embodiments, when the headset is worn, the projection of the second microphone on the user's sagittal plane is outside the projection of the user's auricle on the user's sagittal plane. This allows the second microphone to not be blocked by the user's auricle, thereby improving the second microphone's ability to pick up ambient sound.

[0016] In some embodiments, when the user is wearing the headset, the angle between the line connecting the second microphone and the third microphone and the user's sagittal axis is -10° to 10°. This allows the line connecting the second microphone and the third microphone to point to the front of the user, so as to better collect the sound of the conversation partner in front of the user.

[0017] In some embodiments, the angle between the line connecting the second microphone and the third microphone and the long axis direction of the sound-emitting part is -30° to 30°. In this way, the line connecting the second microphone and the third microphone can point to the front of the user to better collect the sound emitted by the conversation partner in front of the user.

[0018] In some embodiments, the distance between the second microphone and the third microphone is 5 mm to 20 mm. In this way, while there is no auricle isolation between the second microphone and the third microphone, there is a time difference between the time when the sound emitted by the conversation partner in front of the user reaches the second microphone and the time when it reaches the third microphone, so that the sound collected by the second microphone and the sound collected by the third microphone have a large phase difference and a small amplitude difference, so as to facilitate differential processing and improve the collection effect of the sound emitted by the conversation partner 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 compared with the inner contour, the projection of the second microphone on the sagittal plane and the projection of the third microphone on the sagittal plane are both arranged closer to the outer contour. That is, on the ear hook, the second microphone and the third microphone are both arranged on the side of the ear hook away from the user's auricle, 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 the echo, and improve the output effect of the sound device.

[0020] In some embodiments, the sound radiated from the sound outlet and the pressure relief hole to the far field of the sound emitting device is directional, and within the target frequency range, the absolute value of the difference in sound pressure level between two far field positions of the sound emitting device in a specific direction and in the opposite direction is not less than 6dB, and the line connecting the sound outlet and the pressure relief hole defines the specific direction. In this way, a higher volume can be received at the opening of the ear canal of the user, so that the user can get a clear listening effect.

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

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

[0023] This specification will be further described in the form of exemplary embodiments, which will be described in detail by the accompanying drawings. These embodiments are not restrictive, and in these embodiments, the same number represents the same structure, wherein:

[0024] Figure 1 is an exemplary ear schematic diagram according to some embodiments of the present specification;

[0025] Figure 2 is an exemplary wearing diagram of a sound-generating device according to some embodiments of this specification;

[0026] Figure 3 is another exemplary wearing diagram of the sound-emitting device according to some embodiments of this specification;

[0027] Figure 4 is an exemplary wearing diagram of a sound-generating device according to some embodiments of this specification;

[0028] Figure 5 is a schematic diagram of an exemplary projection of a sound-generating device on a user's sagittal plane according to some embodiments of this specification;

[0029] Figure 6 is an exemplary structural schematic diagram of a sound-emitting device in a non-worn state according to some embodiments of this specification;

[0030] Figure 7 is a schematic diagram of an exemplary sound pressure level sound field distribution of a sound-emitting part according to some embodiments of this specification;

[0031] Fig. 8A is a schematic diagram of the relative positions of the pressure relief hole, the sound outlet hole and the first microphone according to some embodiments of this specification;

[0032] Figure 8B is a schematic diagram 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 this specification;

[0033] Fig. 9 is a schematic cross-sectional view of an ear hook at a first microphone according to some embodiments of this specification;

[0034] Fig.10 is a schematic diagram of an exemplary internal structure of a sound-producing part according to some embodiments of this specification;

[0035] Fig.11 is a schematic diagram of the directivity of the sound-emitting part according to some embodiments of this specification;

[0036] Fig.12 It is a schematic diagram of the sound pressure level sound field distribution of the sound-emitting part according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0037] In order to more clearly illustrate the technical solutions of the embodiments of this specification, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some examples or embodiments of this specification. For ordinary technicians in this field, this specification can also be applied to other similar scenarios based on these drawings without creative work. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

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

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

[0040] Flowcharts are used in this specification to illustrate the operations performed by the system according to the embodiments of this specification. It should be understood that the preceding or following operations are not necessarily performed precisely in order. Instead, the steps may be processed in reverse order or simultaneously. At the same time, other operations may also be added to these processes, or one or more operations may be removed from these processes.

[0041] A sound-generating device with a hearing aid function, such as a hearing aid, mainly includes a microphone for collecting external sounds, a processing circuit for processing signals, and a speaker for outputting sounds. The signal collected by the microphone is processed (for example, amplified) by the processing circuit and then sent to the speaker, which plays it to the user. In some cases, the microphone collects the sound played by the speaker, and the processing circuit amplifies this part of the sound signal and sends it to the speaker again for playback, thereby forming an echo, resulting in poor output effect of the hearing aid.

[0042] The current types of hearing aids mainly include behind-the-ear hearing aids and ear canal hearing aids, etc. Behind-the-ear hearing aids include in-ear hearing aids and open hearing aids. Among them, ear canal hearing aids are set in the user's external auditory canal, and in-ear hearing aids will block the user's ear canal opening when worn. Both will reduce the user's wearing comfort when worn for a long time. However, the speakers of ear canal hearing aids and in-ear hearing aids are located in the user's external auditory canal when worn, and the microphone is located outside the external auditory canal. The sound generated by the speaker is isolated by the user's external auditory canal, is not easily collected by the speaker, and is not easy to produce echoes, so the output effect is better. Open hearing aids will not block the user's ear canal opening and are more comfortable to wear. However, a sound transmission path is easily formed between the speaker and microphone of the open hearing aid, which produces a large echo, resulting in poor output effects.

[0043] In order to solve the above problems, some embodiments of the present specification provide an open sound-generating device, which mainly includes a sound-generating part, an ear hook, one or more microphones and a processing circuit. Among them, the microphone can collect external sound signals and generate corresponding electrical signals, the processing circuit can process and amplify the electrical signals, and the sound-generating part outputs sound according to the amplified electrical signals. Among them, the ear hook includes a first part hung between the user's auricle and the user's head and a second part extending to the side of the user's auricle away from the user's head and connected to the sound-generating part. The ear hook can place the sound-generating part near the user's external auditory canal but not blocking the user's ear canal opening, thereby improving the wearing comfort of the sound-generating device. Furthermore, at least one of the one or more microphones is located in the first part of the ear hook, and the line connecting the at least one microphone and the sound outlet on the sound-generating part housing passes through the user's auricle. By isolating the auricle between the sound outlet and the microphone, the sound output by the sound-generating part is blocked by the auricle, reducing the sound output by the sound-generating part received by the microphone, reducing the influence of the sound output by the sound-generating part on the microphone, and reducing the generation of echoes. 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.

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

[0045] like Figure 1 As shown, the ear 100 may include an external auditory canal 101, a cavum concha 102, a cymba concha 103, a triangular fossa 104, an antihelix 105, a scaphoid 106, a helix 107, an earlobe 108, and a tragus 109. In some embodiments, the auricle (or auricle) may be a general term for other external ear parts of the ear 100 except the external auditory canal 101. For example, Figure 1As shown, the auricle may include the concha cavity 102, the cymba concha 103, the triangular fossa 104, the antihelix 105, the scaphoid 106, the helix 107, the earlobe 108 and the tragus 109. It should be noted that, for the convenience of description, the crus superior to the antihelix and the crus inferior to the antihelix and the antihelix 105 are collectively referred to as the antihelix region in the embodiments of this specification. In some embodiments, the sound-generating device can be supported by one or more parts of the ear 100 to achieve the stability of the sound-generating device. In some embodiments, the external auditory canal 101, the concha cavity 102, the cymba concha 103, the triangular fossa 104 and other parts have a certain depth and volume in three-dimensional space, which can be used to achieve the wearing requirements of the sound-generating device. For example, the sound-generating device (for example, an in-ear hearing aid) can be worn in the external auditory canal 101. In some embodiments, the sound-generating device can be worn by other parts of the ear 100 other than the external auditory canal 101. For example, the sound-generating device can be worn with the help of the cymba concha 103, the triangular fossa 104, the antihelix 105, the scaphoid 106, or the helix 107 or a combination thereof. In some embodiments, in order to improve the comfort and reliability of the sound-generating device in wearing, it is also possible to further use the user's earlobe 108 and other parts. By using other parts of the ear 100 other than the external auditory canal 101 to achieve the wearing of the sound-generating device and the propagation of sound, the user's external auditory canal 101 can be "liberated". In some embodiments, the sound-generating device can be designed into a structure adapted to the ear 100 according to the structure of the ear 100, so as to achieve the wearing of the sound-generating part of the sound-generating device at different positions of the ear 100. For example, when the sound-emitting device is an open-type hearing aid, the open-type hearing aid may include an ear hook and a sound-emitting part, the sound-emitting part is physically connected to the ear hook, and the ear hook may be adapted to the shape of the auricle to place the entire or partial structure of the sound-emitting part on the upper part of the tragus (for example, the position where one or more parts of the tragus 109, the cymba concha 103, the triangular fossa 104, the antihelix 105, the scaphoid 106, the helix 107, etc. are located). For another example, when the user wears an open-type hearing aid, the entire or partial structure of the sound-emitting part may be located in a cavity formed by one or more parts of the ear 100 (for example, the cavum concha 102, the cymba concha 103, the triangular fossa 104, etc.).

[0046] Different users may have individual differences, resulting in different shapes, sizes and other dimensional differences in the ear 100. For the sake of ease of description and understanding, if not otherwise specified, this specification will mainly use an ear model with a "standard" shape and size as a reference to further describe the wearing method of the sound-emitting device in different embodiments on the ear model. For example, a simulator containing a head and its (left and right) ears 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 used as a reference for wearing a sound-emitting device, thereby presenting the scene of most users wearing the sound-emitting device normally. Taking GRAS KEMAR as an example, the ear simulator can be any one of GRAS 45AC, GRAS 45BC, GRAS 45CC or GRAS 43AG. 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. It should be noted that the data range measured in the embodiments of this specification is measured on the basis of GRAS 45BCKEMAR, but it should be understood that there may be differences between different head models and ear models, and the relevant data range may fluctuate by ±10% when using other models. Just as an example, the ear 100 used as a reference can have the following relevant characteristics: the size of the projection of the auricle on the sagittal plane in the vertical axis direction can be in the range of 49.5mm to 74.3mm, and the size of the projection of the auricle on the sagittal plane in the sagittal axis direction can be in the range of 36.6mm to 55mm. Therefore, in this application, descriptions such as "user wears", "in a wearing state" and "in a wearing state" can refer to the sound-generating device described in this application being worn on the ear 100 of the aforementioned simulator. Of course, considering the individual differences among different users, the structure, shape, size, thickness, etc. of one or more parts of the ear 100 can be designed differently according to the ears 100 of different shapes and sizes. These differentiated designs can be manifested as characteristic parameters of one or more parts of the sound-emitting device (for example, the sound-emitting part, ear hook, etc. hereinafter) having different ranges of values, so as to adapt to different ears 100. In addition, it should be noted that: "non-wearing state" is not limited to the state where the sound-emitting device is not worn on the user's ear 100, but also includes the state where the sound-emitting device is not deformed by external force; "wearing state" is not limited to the state where the sound-emitting device is worn on the user's ear 100, and the ear hook and the sound-emitting part are spread apart to a corresponding distance can also be regarded as a wearing state.

[0047] It should be noted that in the fields of medicine and anatomy, three basic planes of the human body can be defined: the sagittal plane, the coronal plane, and the horizontal plane, as well as three basic axes: the sagittal axis, the coronal axis, and the vertical axis. Among them, the sagittal plane refers to a plane perpendicular to the ground along the front-back direction of the body, which divides the human body into left and right parts; the coronal plane refers to a plane perpendicular to the ground along the left-right direction of the body, which divides the human body into front and back parts; the horizontal plane refers to a plane parallel to the ground along the vertical direction perpendicular to the body, which divides the human body into upper and lower parts. Correspondingly, the sagittal axis refers to an axis along the front-back direction of the body and perpendicular to the coronal plane, the coronal axis refers to an axis along the left-right direction of the body and perpendicular to the sagittal plane, and the vertical axis refers to an axis along the up-down direction of the body and perpendicular to the horizontal plane. Furthermore, the "front side of the ear" described in the present application is a concept relative to the "back side of the ear". The front side of the ear refers to the side of the ear 100 that is located along the sagittal axis and faces the human face area, and the back side of the ear refers to the side of the ear 100 that is located along the sagittal axis and faces away from the human face area. Figure 1 A schematic diagram of the front profile of the ear portion 100 is shown.

[0048] The description of the ear 100 is for illustrative purposes only and is not intended to limit the scope of the present application. A person skilled in the art can make various changes and modifications based on the description of the present application. For example, a part of the structure of the sound-generating device can cover 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 a sound-generating device according to some embodiments of this specification, Figure 3 FIG. 1 is another exemplary wearing diagram of the sound-generating device according to some embodiments of this specification. Figure 2 and Figure 3 As shown, the sound-generating device 10 may include a sound-generating portion 11, an ear hook 12, and one or more microphones (eg, Figure 3In some embodiments, the sound-emitting device 10 can wear the sound-emitting part 11 on the user's body (for example, the head, neck or upper torso of the human body) through the ear hook 12, and the sound-emitting part 11 can be close to the user's external auditory canal but not block the ear canal opening, so that the user's ear 100 remains open, thereby improving the wearing comfort of the sound-emitting device 10. One or more microphones can collect external environmental sounds and generate corresponding electrical signals, and the processing circuit can amplify the electrical signals generated by the microphones. The sound-emitting part 11 generates sound output under the stimulation of the amplified electrical signals.

[0050] In some embodiments, the sound-emitting part 11 may include a shell 111 and a diaphragm 112 disposed in the shell 111, and the shell 111 may be used to be worn on the user's body and may carry the diaphragm 112. In some embodiments, the shell 111 may be a closed shell structure with a hollow interior, and the diaphragm 112 is located inside the shell 111. In some embodiments, the shell 111 may be a shell structure having a shape that fits the human ear 100, for example, 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 may also include a fixing structure. Exemplarily, the fixing structure may be an ear hook, an elastic band, etc., so that the sound-emitting device 10 can be better worn on the user to prevent the user from falling off during use.

[0051] In some embodiments, when the user wears the sound emitting device 10, the sound emitting portion 11 may be located above, below, in front of (eg, in front of the tragus) or inside the auricle (eg, 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 and rear sides of the diaphragm 112, respectively. A front cavity (not shown in the figure) for transmitting sound is provided at the front side of the diaphragm 112 in the shell 111, and a rear cavity (not shown in the figure) for transmitting sound is provided at the rear side of the diaphragm 112 in the shell 111. A sound outlet hole 1111 acoustically coupled with the front cavity and a pressure relief hole 1112 acoustically coupled with the rear cavity can also be provided on the shell 111. Sound from the front side of the diaphragm 112 can be emitted from the sound outlet hole 1111 through the front cavity, and sound from the rear side of the diaphragm 112 can be emitted from the pressure relief hole 1112 through the rear cavity. In some embodiments, the diaphragm 112 in the sound-emitting portion 11 can output sounds with a phase difference (e.g., opposite phases) through the sound outlet hole 1111 and the pressure relief hole 1112. When the diaphragm 112 is vibrating, a group of sounds with a phase difference (e.g., opposite phases) can be simultaneously generated at the front and rear sides of the diaphragm 112. After the sound passes through the front cavity and the back cavity respectively, it will propagate outward from the sound outlet 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 1111 may be located on the inner side wall (e.g., inner side IS) of the shell 111 of the sound-emitting part 11 facing the user's external auditory canal 101, and the pressure relief hole 1112 may be located on the side (e.g., outer side OS) of the shell 111 of the sound-emitting part 11 facing away from the user's external auditory canal 101.

[0053] Combination Figure 1 , Figure 2 and Figure 3 , Figure 2 11A, 11B and 11C in the figure respectively represent schematic diagrams of different positions of the sound-emitting part 11 in the wearing state, Figure 3It is a schematic diagram when the sound-emitting part 11 is in the position shown in 11C when being worn. In some embodiments, when the user wears the sound-emitting device 10, at least a portion of the sound-emitting part 11 may be located in the area in front of the tragus of the user's ear 100 or in the anterior-lateral surface area of ​​the auricle. The following will provide an exemplary description of the sound-emitting part 11 (for example, the sound-emitting part 11A, the sound-emitting part 11B, and the sound-emitting part 11C) in combination with different wearing positions. It should be noted that the anterior-lateral surface of the auricle mentioned in the embodiments of this specification refers to the side of the auricle away from the head along the coronal axis direction, and correspondingly, the posterior-medial surface of the auricle refers to the side of the auricle facing the head along the coronal axis direction. In some embodiments, the sound-emitting part 11A is located on the side of the user's ear 100 facing the human facial area along the sagittal axis direction, that is, the sound-emitting part 11A is located in the human facial area in front of the ear 100. Furthermore, a diaphragm 112 is disposed inside the shell of the sound-emitting part 11A, and at least one sound outlet 1111 may be disposed on the shell 111 of the sound-emitting part 11A. The sound outlet 1111 may be located on the side wall of the shell 111 of the sound-emitting part 11 facing or close to the external auditory canal 101 of the user, and the diaphragm 112 may output sound to the external auditory canal 101 of the user through the sound outlet 1111. In some embodiments, the sound-emitting part 11 may have a long axis direction Y and a short axis direction Z that are 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 dimension in the shape of the two-dimensional projection surface of the sound-emitting part 11 (for example, the projection of the sound-emitting part 11 on the plane where its outer side surface is located, or the projection on the sagittal plane) (for example, 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 projection of the sound-emitting part 11 on the sagittal plane (for example, 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 surface, for example, consistent with the direction of the coronal axis, both pointing to the left and right directions of the body. In some embodiments, the thickness direction X can also be defined as the direction in which the sound-emitting part 11 approaches or moves away from the ear 100 in the wearing state. In some embodiments, when the sound-emitting part 11 is in a tilted 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, and 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 tilted accordingly, 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 tilted, such as Figure 2 In some embodiments, the entire or partial structure of the shell 111 of the sound-emitting part 11B can extend into the concha cavity 102, that is, the projection of the shell 111 of the sound-emitting part 11B on the sagittal plane overlaps with the projection of the concha cavity 102 on the sagittal plane. For the specific content of the sound-emitting part 11B, please refer to the content elsewhere in this specification, for example, Figure 4 In some embodiments, the sound-emitting portion 11 may also be in a horizontal state or a nearly horizontal state when worn, such as Figure 2 and Figure 3 As shown in the sound-emitting part 11C, the long axis direction Y can be consistent or approximately consistent with the direction of the sagittal axis, both pointing to the front and 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 and down direction of the body. It should be noted that in the wearing state, the sound-emitting part 11C is in an approximately horizontal state, which can refer to Figure 2 The angle between the long axis direction Y of the sound-emitting part 11C and the sagittal axis is within a specific range (for example, not more than 20°). Figure 2 The sound-emitting part 11A, the sound-emitting part 11B and the sound-emitting part 11C shown in the figure only need to satisfy that at least part of the sound-emitting part 11 can be located in the area in front of the tragus in the ear 100 of the user or in the area in front of the auricle. For example, the whole or part of the structure of the sound-emitting part 11 can be located in front of the tragus 109. For another example, the whole or part of the structure of the sound-emitting part 11 can be in contact with the upper part of the external auditory canal 101 (for example, the position where one or more parts of the tragus 109, the cymba concha 103, the triangular fossa 104, the antihelix 105, the scaphoid 106, the helix 107, etc. are located). For another example, the whole or part of the structure of the sound-emitting part 11 can be located in a cavity formed by one or more parts of the ear 100 (for example, the cavum concha 102, the cymba concha 103, the triangular fossa 104, etc.).

[0054] In some embodiments, in the wearing state, the ear hook 12 includes a first portion 121 and a second portion 122 (eg, Figure 5 As shown), the first part 121 is hung between the user's auricle and the head, the second part 122 extends to the side of the auricle away from the head and connects to the sound-emitting part 11, and the sound-emitting part 11 is worn near the external auditory canal but does not block the ear canal opening.

[0055] In some embodiments, the first portion 121 of the ear hook 12 includes a storage compartment 123. The processing circuit can be disposed in the storage compartment 123, and the storage compartment 123 can protect the processing circuit. In some embodiments, the storage compartment 123 is located at an end of the first portion 121 away from the sound-emitting portion 11, and the projection profile of the end of the ear hook 12 away from the sound-emitting portion 11 is the projection profile of the free end of the storage compartment 123 on the user's sagittal plane. In some embodiments, when the user wears the sound-emitting device 10, the sound-emitting portion 11 and the storage compartment 123 can be located at the front and back sides of the auricle, respectively.

[0056] In order to improve the stability of the sound-generating device 10 when worn, the sound-generating device 10 may adopt any one of the following methods or a combination thereof. First, at least a portion of the ear hook 12 is configured as a contoured structure that fits at least one of the back side of the ear and the head, so as to increase the contact area between the ear hook 12 and the ear 100 and / or the head, thereby increasing the resistance of the sound-generating device 10 to fall off from the ear 100. Second, at least a portion of the ear hook 12 is configured as an elastic structure so that it has a certain amount of deformation when worn, so as to increase the positive pressure of the ear hook 12 on the ear 100 and / or the head, thereby increasing the resistance of the sound-generating device 10 to fall off from the ear 100. Third, at least a portion of the ear hook 12 is configured to abut against the head when worn, so as to form a reaction force that presses the ear 100, so that the sound-generating portion 11 is pressed against the front side of the ear, thereby increasing the resistance of the sound-generating device 10 to fall off from the ear 100. Fourthly, the sound-emitting part 11 and the ear hook 12 are configured to clamp the antihelix area and the area where the cavum concha 102 is located from the front and back sides of the ear 100 when worn, thereby increasing the resistance of the sound-emitting device 10 to falling off from the ear 100. Fifthly, the sound-emitting part 11 or the auxiliary structure connected thereto is configured to at least partially extend into the cavities such as the cavum concha 102, the cymba concha 103, the triangular fossa 104 and the scaphoid 106, thereby increasing the resistance of the sound-emitting device 10 to falling off from the ear 100.

[0057] For example, in combination Figure 4 In the wearing state, the free end FE of the sound-emitting part 11 can extend into the concha cavity 102. The sound-emitting part 11 and the ear hook 12 can be configured to clamp the ear region corresponding to the concha cavity 102 from both the front and rear sides of the ear region, thereby increasing the resistance of the sound-emitting device 10 to fall off the ear 100, thereby improving the stability of the sound-emitting 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 against the concha cavity 102 in the long axis direction Y and the short axis direction Z.

[0058] Figure 4 is an exemplary wearing diagram of a sound-generating device according to some embodiments of this specification, Figure 5 is a schematic diagram of an exemplary projection of a sound-generating device on a user's sagittal plane according to some embodiments of this specification, Figure 6 is an exemplary structural diagram of a sound-generating device in a non-wearing state according to some embodiments of this specification. Figure 5 Points A', B', C', D', E', P', Q', M' and H' are Figure 4 Points A, B, C, D, E, P, Q, M, and H shown are projection points on the user's sagittal plane.

[0059] In some embodiments, please refer to Figure 4 , Figure 5 and Figure 6 , the sound-emitting part 11 may have an inner side surface IS facing the ear and an outer side surface OS away from the ear along the thickness direction X in the wearing state, as well as a connecting surface connecting the inner side surface IS and the outer side surface OS. It should be noted that: in the wearing state, observed along the direction of the coronal axis (i.e., the thickness direction X), the sound-emitting part 11 may be set to a circular, elliptical, rounded square, rounded rectangle and the like. Among them, when the sound-emitting part 11 is set to a circular, elliptical and other shapes, the above-mentioned connecting surface may refer to the arc-shaped side surface of the sound-emitting part 11; and when the sound-emitting part 11 is set to a rounded square, rounded rectangle and the like, the above-mentioned connecting surface may include the lower side surface LS, upper side surface US and rear side surface RS mentioned later. Therefore, for the convenience of description, this embodiment takes the sound-emitting part 11 as a rounded rectangle as an example for illustrative explanation. Among them, the length of the sound-emitting part 11 in the major axis direction Y may be greater than the width of the sound-emitting part 11 in the minor axis direction Z. As Figure 3 As shown, the sound-emitting part 11 may have an upper side surface US facing away from the external auditory canal 101 along the short axis direction Z and a lower side surface LS facing the external auditory canal 101 in the wearing state, and a rear side surface RS connecting the upper side surface US and the lower side surface LS, and the rear side surface RS is located at the end facing the back of the brain in the long axis direction Y in the wearing state, and is at least partially located in the concha cavity 102. In some embodiments, the rear side surface RS of the sound-emitting part 11 is the free end FE of the sound-emitting part 11.

[0060] In some embodiments, the sound hole 1111 can be disposed on the inner side IS of the sound-emitting portion 11, and the pressure relief hole 1112 can be disposed on the upper side US of the sound-emitting portion 11. In some embodiments, the centroid point P of the sound hole 1111 can be used to represent the position of the sound hole 1111, and the centroid point Q of the pressure relief hole 1112 can be used to represent the position of the pressure relief hole 1112, such as Figures 4 to 6 As shown. In some embodiments, the direction of the line PQ points to the user's ear canal opening to enhance the directivity of the sound-emitting portion 11. In some embodiments, when there are multiple sound outlet holes 1111, point P can be understood as the centroid of an equivalent hole portion formed by multiple sound outlet holes 1111; when there are multiple pressure relief holes 1112, point Q can be understood as the centroid of an equivalent hole portion formed by multiple pressure relief holes 1112. In some embodiments, the position of an equivalent hole portion formed by multiple hole portions can be determined by connecting the center points of adjacent hole portions in sequence to form a polygon or a polyhedron, and the centroid of the polygon or polyhedron is the center point of the equivalent hole portion, which can be used to indicate the position of the equivalent hole portion.

[0061] In some embodiments, when the diaphragm 112 vibrates, the front and rear sides of the diaphragm 112 can each serve as a sound wave generating structure to generate sound waves with equal amplitude and opposite phases. In some embodiments, the sound waves with equal amplitude and opposite phases can radiate outward through the sound outlet 1111 and the pressure relief hole 1112, respectively, to form a dual sound source, which can interfere and destructively interfere at a spatial point (e.g., a far field), thereby reducing the far-field sound leakage of the sound-emitting part 11.

[0062] Figure 7 Schematic diagram of exemplary sound pressure level and sound field distribution of the sound-emitting part according to some embodiments of this specification. Figure 7 As shown, in the mid-low frequency range (for example, 50Hz-1kHz), the sound field distribution of the sound-emitting part 11 shows good dual sound source directivity. That is to say, in the mid-low frequency range, the dual sound sources formed by the sound outlet 1111 and the pressure relief hole 1112 of the sound-emitting part 11 output sound waves with opposite phases, and the sound field forms a distribution mode of two petal structures in space, in two opposite directions of the dual sound source connection line (that is, two opposite directions on the connection line PQ, Figure 7 In the 0° and 180° directions in the figure, the sound pressure level is relatively large, which is a high sound leakage area; while in the direction perpendicular to the line connecting the two sound sources (i.e., the perpendicular direction of the line PQ, Figure 7 In the 90° direction and 270° direction), the sound pressure level is small, which is a low sound leakage area.

[0063] In some embodiments, at least one of the one or more microphones is located on the first portion 121 of the ear hook 12, for example Figure 4 The connection line between at least one microphone and the sound outlet 1111 passes through the user's auricle, for example Figure 4 The connection lines AP and CP shown pass through the user's auricle. By isolating the auricle between the sound outlet 1111 and the microphone, the sound output by the sound-emitting part 11 is blocked by the auricle, reducing the sound output by the sound-emitting part 11 received by the microphone, reducing the impact of the sound output by the sound-emitting part 11 on the microphone, and reducing the generation of echoes. At the same time, the auricle can block the wind and reduce the wind noise received by the microphone, thereby improving the output effect of the sound-emitting device 10.

[0064] In some embodiments, one or more microphones may include or even only include a first microphone (not shown in the figure), which can collect external environmental sounds and generate corresponding electrical signals. Based on the electrical signals 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 output by the sound generating unit 11 on the first microphone, reduce the generation of echoes, and improve the output effect of the sound generating device 10, the sound output by the sound generating unit 11 received by the first microphone can be minimized. For example, the first microphone can be located at the position of point A.

[0066] In some embodiments, in addition to setting a spacer (auricle) between the first microphone and the sound-emitting part 11, the sounds output by the sound outlet 1111 and the pressure relief hole 1112 of the sound-emitting part 11 can be offset at the first microphone to reduce the sound output by the sound-emitting part 11 collected by the first microphone, thereby reducing the generation of echoes and improving the output effect of the sound-emitting device 10. That is, the first microphone should be placed in a low sound leakage area of ​​the sound-emitting part 11, for example, Figure 7 The 90° direction and the 270° direction of the sound source 11 are near each other, so that the difference in sound pressure level of the sound output from the sound outlet 1111 and the pressure relief hole 1112 of the sound-emitting part 11 is small (for example, less than 3 dB) at the first microphone. To achieve this goal, the distance from the first microphone to the centroid point P of the sound outlet 1111 (i.e., the length of the line AP) and the distance from the first microphone to the centroid point Q of the pressure relief hole 1112 (i.e., the length of the line AQ) should be close to or equal, so that the sound paths from the sound outlet 1111 and the pressure relief hole 1112 to the first microphone are close, so that the sounds output from the sound outlet 1111 and the pressure relief hole 1112 can cancel each other out at the first microphone. In some embodiments, the ratio of the distance from the first microphone to the centroid point P of the sound outlet 1111 (i.e., the length of the line AP) to the distance from the first microphone to the centroid point Q of the pressure relief hole 1112 (i.e., the length of the line AQ) is in the range of 0.8 to 1.2. In some embodiments, in order to further reduce the generation of echoes, the difference between the distance from the first microphone to the centroid point P of the sound outlet 1111 (i.e., the length of the line AP) and the distance from the first microphone to the centroid point Q of the pressure relief hole 1112 (i.e., the length of the line AQ) can be less than 5 mm.

[0067] Please continue to refer to Figure 7, the sound field of the sound-emitting part 11 forms a distribution mode of two petal-shaped structures in space. In the two opposite directions of the dual sound source connection line (i.e., the two opposite directions on the connection line PQ), the sound pressure level is relatively large, which is a high sound leakage area; and in the direction perpendicular to the dual sound source connection line (i.e., the perpendicular direction of the connection line PQ), the sound pressure level is relatively small, which is a low sound leakage area. In order to reduce the sound output by the sound-emitting part 11 collected by the first microphone, the first microphone can be set in the low sound leakage area, that is, the first microphone can be set near the 90° direction or 270° direction of the directivity of the sound field of the sound-emitting part 11. In some embodiments, considering the structure and position setting of the ear hook 12 and the sound-emitting part 11, when the sound outlet 1111 is located in the 0° direction, the pressure relief hole 1112 is located in the 180° direction, and the first part 121 is located on the side where the line connecting the pressure relief hole 1112 and the sound outlet 1111 points to the 270° direction, the first microphone can be set near the 270° direction.

[0068] Fig. 8A is a schematic diagram of the relative positions of the pressure relief hole, the sound outlet hole and the first microphone according to some embodiments of this specification, Figure 8B is a schematic diagram 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 this specification. Figure 5 , Figure 6 , Fig. 8A and Figure 8B The line PQ connecting the centroid point P of the sound outlet 1111 and the centroid point Q of the pressure relief hole 1112 has a midpoint point M, and the line PQ has a perpendicular bisector S1 passing through point M. Fig. 8A is a perspective from the free end FE of the sound-emitting portion 11 toward the connection end where the sound-emitting portion 11 is connected to the ear hook 12, Figure 8B The relative position of the first microphone (point A) and the perpendicular bisector S1 is shown.

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

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

[0071] In some embodiments, please refer to Figure 4 , Figure 5 , Figure 6 In the wearing state, the free end FE of the sound-emitting part 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-emitting part 11 has a second contact point E that contacts the user's auricle, and the second contact point E can cooperate with the free end FE to clamp the sound-emitting 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 the line AD) and the distance from the first microphone (i.e., point A) to the second contact point E (i.e., the length of the line AE) is less than 1 mm. That is, the absolute value of the difference between the lengths of the line AD and the line AE is less than 1 mm. Through the above settings, the distances from the first microphone to the first contact point D and the second contact point E can be close, that is, the first microphone can be located near the perpendicular bisector of the line between the first contact point D and the second contact point E. At this time, the first microphone is far away from the first contact point D and the second contact point E at the same time, so that the first microphone is far away from the user's head skin or auricle, so as to reduce the echo generated by the user's head skin or auricle 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 close to the perpendicular bisector of the line between the first contact point D and the second contact point E, and the absolute value of the difference between the lengths of the line AD and the line AE can be less than 0.8 mm. In some embodiments, in order to further arrange the first microphone close to 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 lengths of the line AD and the line AE may be less than 0.5 mm.

[0073] Fig. 9 is a schematic cross-sectional view of an ear hook at the first microphone according to some embodiments of this specification. Fig. 9 , point D” is the projection point of the first contact point D on the cross section, point E” is the projection point of the second contact point E on the cross section, and straight line L1 is the intersection line 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 may be the projection of the perpendicular bisector of the line connecting the points D” and E” on the cross section. Fig. 9 As shown, point A may be disposed close to the straight line L1, and correspondingly, the first microphone may be disposed close to 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 point H in the long axis direction Y of the sound-emitting part 11. In some embodiments, the outer contour of the ear hook 12 has a section perpendicular to the long axis direction Y at the outermost point H, and the projection of the section on the user's sagittal axis is the straight line L2. That is, the straight line L2 is tangent to the ear hook 12 at the point H.

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

[0076] In some embodiments, the distance between the first microphone (i.e., point A) and the outermost end (i.e., point H) (i.e., the length of the line AH) may be no 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 auricle when worn, thereby making the first microphone away from the user's auricle, reducing the echo caused by the user's ear interfering with the first microphone, and improving the output effect of the sound-emitting device 10. In some embodiments, in order to further keep the first microphone away from the user's ear and reduce the interference of the user's ear on the first microphone, the distance between the first microphone and the outermost end (i.e., the length of the line AH) may be no greater than 1.5 mm. In some embodiments, in order to further keep the first microphone away from the user's head skin and reduce the echo, the distance between the first microphone and the outermost end (i.e., the length of the line AH) may be no greater than 1 mm.

[0077] If the cross-sectional area of ​​the ear hook 12 near point A is very small, the ear hook 12 will contact the back of the auricle or the head skin when worn, which will cause the distance between point A and the back of the auricle or the head skin to be too small, affecting the sound pickup effect of the first microphone. In order to avoid the above problem, the cross-sectional area of ​​the position of the first microphone on the ear hook 12 should meet certain conditions. Please refer to Fig. 9 The first microphone is arranged at the first position of the ear hook 12 (i.e., point A), and the cross-sectional area of ​​the ear hook 12 at the first position is 75 mm 2 ~250mm 2 , so that the ear hook 12 has sufficient structural strength, and the first microphone can be away from the user's ear, reducing echo and improving the output effect of the sound 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 cross-sectional shape of the ear hook 12 may be circular, that is, the ear hook 12 may be cylindrical as a whole, so that the ear hook 12 is round and has no edges and corners, thereby improving the wearing comfort of the ear hook 12. In some embodiments, in order to keep the first microphone away from the user's ear and head skin and reduce echo, the radius of the cross-sectional shape of the ear hook 12 at the first position may be 5 mm to 7 mm.

[0079] In some embodiments, the first microphone (i.e., point A) can be disposed in the storage compartment 123, and the storage compartment 123 can protect the first microphone. In addition, compared with the size of other positions on the ear hook 12, the size of the storage compartment 123 is larger, so that the first microphone can be kept away from the user's ear and head skin, reducing echoes and improving the output effect of the sound 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 most outwardly convex points on the ear hook 12, that is, a plane that supports the ear hook 12 when the ear hook 12 is placed freely (i.e., not subject to external force). For example, when the ear hook 12 is placed freely 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 divides the ear hook 12 in half or approximately in half along the direction in which the ear hook 12 extends in length. When worn, the ear hook 12 can be approximately regarded as being fitted to the head, and the ear hook plane S2 can be approximately equivalent to the fitting surface between the ear hook 12 and the user's head, and the distance from the first microphone to the ear hook plane S2 can reflect the distance between the first microphone and the user's head. If the distance from the first microphone to the ear hook plane S2 is too small, the user's head skin may interfere with the first microphone, generate an echo, and affect the output effect of the sound-generating device 10. In some embodiments, the distance from the first microphone (ie, point A) to the ear hook plane S2 is greater than 10 mm.

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

[0082] In some embodiments, one or more microphones may include a microphone array formed by at least two microphones, for example, including a second microphone (not shown in the figure) and a third microphone (not shown in the figure), and the second microphone and the third microphone can respectively collect external environmental sounds and respectively generate corresponding electrical signals. The processing circuit can mainly identify the sound in a specific direction range (for example, the direction pointed by the dual microphone connection) based on the electrical signal collected by the microphone array and further process (for example, amplify) the sound in the specific direction. In the embodiments of the present specification, point B can be used to represent the position of the second microphone, and point C can be used to represent the position of the third microphone. Figure 3 , Figure 4 , Figure 5 shown.

[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) between the third microphone (i.e., point C) and the sound outlet 1111 (i.e., point P) passes through the user's auricle, so that the sound output by the sound-emitting part 11 is blocked by the auricle, reducing the sound output by the sound-emitting part 11 received by the third microphone, reducing the generation of echoes, and the auricle can block the wind, reducing the wind noise received by the third microphone, thereby improving the output effect of the sound-emitting device 10. 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-emitting part 11 collected by the second microphone and the third microphone to reduce the echo, the sound-emitting part 11 can be designed so that the sound field of the sound-emitting part 11 is directional, with a large output only in the direction from the sound-emitting part 11 to the user's ear canal opening, while making the sound leakage of the sound-emitting part 11 in other directions small. For example, the sound field of the sound-emitting part 11 can be made to be cardioid directional, with the directional direction being the direction from the sound-emitting part 11 to the user's ear canal opening (for example, the direction from the centroid Q point of the pressure relief hole 1112 to the centroid P point of the sound outlet hole 1111).

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

[0086] Fig.11 is a schematic diagram of the directivity of the sound-emitting part according to some embodiments of this specification; Fig.12 It is a schematic diagram of the sound pressure level sound field distribution of the sound-emitting part according to some embodiments of the present disclosure.

[0087] Please refer to Fig.11 and Fig.12 , in some embodiments, Fig.11 The sound-emitting part 11 is shown in a wearing state, wherein point P represents the sound outlet hole 1111 through which the first diaphragm 112-1 outputs sound, and point Q represents the pressure relief hole 1112 through which the second diaphragm 112-2 outputs sound. In some embodiments, the sound radiated to the far field of the sound-emitting device 10 by the sound outlet hole 1111 and the pressure relief hole 1112 presents directivity, and within the target frequency range, the absolute value of the difference in sound pressure level at two far-field positions of the sound-emitting device 10 in a specific direction and in the opposite direction is not less than 6 dB. The line connecting the sound outlet hole 1111 and the pressure relief hole 1112 (i.e., the line QP) defines the specific direction.

[0088] In some embodiments, the far-field radiation of the sound-emitting device 10 is directional, which means that the output sound direction of the sound-emitting device 10 is within a specified direction range, that is, the far-field radiation of the sound-emitting device 10 within the specified direction range is significantly greater than the far-field radiation outside the specified direction range. In some embodiments, when the sound-emitting device 10 is in a worn state, the direction K1 (i.e., the direction K1 from the Q point to the P point) pointing from the pressure relief hole 1112 (i.e., point Q) to the sound outlet hole 1111 (i.e., point P) and the directions nearby (e.g., direction K2, direction K3) are pointing to the ear canal opening of the user's external auditory canal. That is, in the worn state, the sound outlet hole 1111 is closer to the ear canal opening of the user's ear. The direction K1' from the sound outlet hole 1111 (i.e., point P) to the pressure relief hole 1112 (i.e., point Q) and the directions nearby (e.g., direction K2', direction K3') are the directions in which the sound-emitting part 11 is away from the ear canal opening of the user. In some embodiments, in the wearing state and / or non-wearing state, the direction K1 (i.e., the direction K1 from the Q point to the P point) pointing from the pressure relief hole 1112 (i.e., the Q point) to the sound outlet hole 1111 (i.e., the P point) and the directions nearby can constitute the above-mentioned specified direction range. The far-field radiation of the sound-emitting device 10 in the direction K1 and the direction nearby is significantly greater than the far-field radiation in other direction ranges (for example, the direction range perpendicular to the direction K1 and the direction nearby, the direction range opposite to the direction K1 and the direction nearby, etc.). In some embodiments, the directivity of the sound-emitting device 10 can be expressed as: the absolute value of the difference in sound pressure level at two corresponding far-field positions in a specific direction of the sound-emitting device 10 and its opposite direction is not less than 6dB. Among them, in the wearing state, the specific direction can refer to the direction in which the sound-emitting device 10 (sound-emitting part 11) is away from the user's ear canal opening, and the opposite direction can refer to the direction in which the sound-emitting device 10 (sound-emitting part 11) is pointing to the user's external ear canal. In some embodiments, the specific direction may refer to the direction K1' and the direction nearby from the sound outlet hole 1111 (i.e., point P) to the pressure relief hole 1112 (i.e., point Q); the opposite direction of the specific direction may refer to the direction K1 (i.e., the direction K1 from point Q to point P) and the direction nearby from the pressure relief hole 1112 (i.e., point Q) to the sound outlet hole 1111 (i.e., point P) . In some embodiments, the direction near the direction K1' can be understood as a direction with an angle of less than 60° with the direction K1'. It should be noted that for the purpose of facilitating the understanding of directivity, only the two hole portions of the sound outlet hole 1111 and the pressure relief hole 1112 are used for exemplary description. When there are more different hole portions in the sound-emitting portion 11 of the sound-emitting device 10, point P can be understood as the centroid of the equivalent hole portion formed by multiple sound outlet holes 1111, and point Q can be understood as the centroid of the equivalent hole portion formed by multiple pressure relief holes 1112.

[0089] In some embodiments, the vibrations of the first diaphragm 112-1 and the second diaphragm 112-2 are not synchronized, and there is a phase difference between the first sound generated by the first diaphragm 112-1 and the second sound generated by the second diaphragm 112-2, so that the first sound and the second sound can be superimposed and enhanced on the side of the sound-emitting part 11 facing the external auditory canal of the user, and superimposed and canceled on the side of the sound-emitting part 11 facing away from the external auditory canal of the user, thereby making the sound field of the sound-emitting part 11 (sound-emitting device 10) cardioid in directivity.

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

[0091] In some embodiments, in order to improve the sound reception effect of the user, the sound device 10 may have a cardioid directivity within the frequency range that the human ear is sensitive to, such as around 3 kHz or around 3.5 kHz. The target frequency range may be 1 kHz to 4 kHz.

[0092] Please refer to Fig.11 and Fig.12 In the cardioid directivity of the sound field of the sound-emitting 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 connecting line (i.e., connecting line PQ) of the centroid of the sound outlet 1111 (i.e., point P) and the centroid of the pressure relief hole 1112 (i.e., point Q) is located on the straight line where the 0° direction and the 180° direction are located.

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

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

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

[0096] In some embodiments, the positive or negative value of the above two angles can indicate on which side of the line connecting the centroid of the sound outlet 1111 and the centroid of the pressure relief hole 1112 (i.e., the line PQ) the corresponding microphone is located. Figure 4When the second microphone (i.e., point B) is located on the side of the line PQ pointing to the user's face (for example, the 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 on the side of the line PQ pointing to the back of the user's head (for example, the 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, when the second microphone is located on the side of the line PQ pointing to the back of the user's head, the angle 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 may be negative; when the third microphone is located on the side of the line PQ pointing to the user's face, the angle between the line connecting the third microphone and point M and the line connecting the centroid of the sound hole 1111 and the centroid of the pressure relief hole 1112 may be positive.

[0097] It should be noted that the second microphone (i.e., point B), the third microphone (i.e., point C), the centroid point P of the sound outlet hole 1111, and the centroid point Q of the pressure relief hole 1112 may be coplanar or non-coplanar, and the angle ∠BMQ corresponding to the second microphone and the angle ∠CMQ corresponding to the third microphone may 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 to better collect the sound emitted by the user's dialogue partner.

[0099] Please refer to Figure 5 , the projection of the ear hook 12 on the user's sagittal plane includes an outer contour, i.e., curve J1J2, and an inner contour, i.e., curve J3J4. Among them, point J1 is the intersection of the outer contour of the ear hook 12 and the sound-emitting portion 11, point J3 is the intersection of the inner contour of the ear hook 12 and the sound-emitting portion 11, point J2 is the endpoint of the end of the accommodating chamber 123 close to the free end of the ear hook 12 on the outer contour of the ear hook 12, and point J4 is the endpoint of the end of the accommodating chamber 123 close to the free end of the ear hook 12 on the inner contour of the ear hook 12. In some embodiments, in the short axis direction Z of the projection of the sound-emitting portion 11 on the sagittal plane, the outer contour curve J1J2 may have an extreme point N. In some embodiments, a reference coordinate system can be established with a reference point (for example, the centroid of the sound-emitting part 11) as the origin, the major axis direction Y as the horizontal axis, and the minor axis direction Z as the vertical axis. The outer contour curve J1J2 of the ear hook 12 can be analyzed in the reference coordinate system to determine the extreme point N of the outer contour curve J1J2 of the ear hook 12 in the minor axis direction Z.

[0100] In some embodiments, point B', a projection of the second microphone on the user's sagittal plane, and point C', a projection of the third microphone on the user's sagittal plane, can be located on both sides of point N, an extreme point 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 to better collect the sound emitted by the user's conversation partner.

[0101] In some embodiments, the second microphone (i.e., point B) may be located in front of the user's auricle. That is, the second microphone is located on the side of the user's auricle facing the user's face, so that the second microphone is not blocked by the user's auricle (e.g., Figure 4 As shown), the second microphone can be positioned in front of the user's auricle to enhance the effect of picking up external environmental sounds. In addition, the second microphone is located in front of the user's auricle, so that the second microphone can be close to the user's face to better collect the sound of the conversation partner in front of the user.

[0102] In some embodiments, when worn, the projection point B' of the second microphone on the user's sagittal plane is outside the projection of the user's auricle on the sagittal plane, so that the second microphone is not blocked by the user's auricle to improve the second microphone's ability to pick up ambient sound.

[0103] Since the second microphone is located in front of the user's auricle, the second microphone is not blocked by the auricle, and the line connecting the second microphone (i.e., point B) and the centroid point P of the sound outlet 1111 may not pass through the auricle. There is no auricle blocking the sound outlet 1111 and the second microphone, and the sound output by the sound outlet 1111 can be directly transmitted to the second microphone. In order to minimize the sound output by the sound-emitting part 11 received by the second microphone, the second microphone should be set 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 centroid point P of the sound outlet 1111 passes through the auricle, the sound output by the sound-emitting part 11 is blocked by the auricle, and the third microphone receives less sound output by the sound-emitting part 11. It is feasible whether the third microphone is set 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 centroid of the sound outlet hole 1111 and the centroid of the pressure relief hole 1112 (i.e., ∠BMQ) may be greater than the angle between the line connecting the third microphone and the midpoint M and the line connecting the centroid of the sound outlet hole 1111 and the centroid of the pressure relief hole 1112 (i.e., ∠CMQ), such as Figure 4 As shown, the second microphone is arranged in a low sound leakage area of ​​the sound field of the sound-emitting part 11, and the third microphone can be arranged in an area of ​​the sound field of the sound-emitting part 11 with large sound leakage.

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

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

[0108] In some embodiments, please combine Figure 2 and Figure 4 , the long axis direction Y of the sound-emitting part 11 can be parallel, inclined or perpendicular to the sagittal axis of the user. The angle 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° to 30°, so that the line connecting the second microphone and the third microphone points to the front of the user, so as to better collect the sound emitted by the conversation partner 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. Exemplarily, when the sound-emitting part 11 is in a state such as Figure 2 When the sound-emitting part 11C is in the position shown in FIG. 1 , the long axis direction Y is parallel to the sagittal axis. At this time, the angle β between the connecting line between the second microphone and the third microphone (i.e., the connecting line CB) and the long axis direction Y of the sound-emitting part 11 can be -30° to 30°. Figure 2When the sound-emitting part 11A is at the position shown in the figure, 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° to 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 inclination angle γ of the long axis direction Y relative to the sagittal axis. When γ is positive, it means that the long axis direction Y is inclined upward relative to the sagittal axis. At this time, the value of β is the angle α minus the angle γ, wherein the angle α is -30° to 30°; when γ is negative, it means that the long axis direction Y is inclined downward relative to the sagittal axis. At this time, the value of β is the angle α plus the angle γ, wherein the angle α is -30° to 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 to 20 mm, so that there is no auricle isolation between the second microphone and the third microphone, and there is a time difference between the time when the sound emitted by the conversation partner in front of the user reaches the second microphone and the time when it reaches the third microphone, so that the sound collected by the second microphone and the sound collected by the third microphone have a large phase difference and a small amplitude difference, so as to facilitate differential processing and improve the collection effect of the sound emitted by the conversation partner 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, the phase difference between the sounds received by the second microphone and the third microphone will be small, the differential processing effect will be poor, and the collection effect will be unsatisfactory. 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 auricle, so that the sound collected by the second microphone and the sound collected by the third microphone have a large phase difference and a large amplitude difference, the differential processing is difficult and the effect is poor, and the collection effect is poor.

[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 to 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 to 13 mm.

[0112] In some embodiments, please refer to Figure 5, compared to the inner contour of the ear hook 12 (i.e., curve J3J4), the projection point B' of the second microphone on the sagittal plane and the projection point C' of the third microphone on the sagittal plane are both arranged close to the outer contour (i.e., curve J1J2). 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 auricle, 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 the echo, and improve the output effect of the sound device 10.

[0113] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary embodiments of the present application.

[0114] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0115] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus help understand one or more embodiments of the invention, in the above description of the embodiments of this application, multiple features are sometimes combined into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0116] In some embodiments, numbers describing the number of components and attributes are used. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise specified, "about", "approximately" or "substantially" indicate 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 change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of the present application are approximate values, in specific embodiments, the setting of such numerical values ​​is as accurate as possible within the feasible range.

[0117] Each patent, patent application, patent application disclosure, and other materials, such as articles, books, instructions, publications, documents, etc., cited in this application are hereby incorporated by reference in their entirety. Except for application history documents that are inconsistent with or conflicting with the content of this application, documents that limit the broadest scope of the claims of this application (currently or later attached to this application) are also excluded. It should be noted that if the descriptions, definitions, and / or use of terms in the attached materials of this application are inconsistent or conflicting with the content described in this application, the descriptions, definitions, and / or use of terms in this application shall prevail.

[0118] Finally, it should be understood that the embodiments described in this application are only used to illustrate the principles of the embodiments of the present application. Other variations may also fall within the scope of the present application. Therefore, as an example and not a limitation, the alternative configurations of the embodiments of the present application may be considered to be consistent with the teachings of the present application. Accordingly, the embodiments of the present application are not limited to the embodiments explicitly introduced and described in the present application.

Claims

1. A sound-generating device, characterized in that: include: A sound-emitting part, comprising a shell and a diaphragm arranged in the shell, wherein a front cavity and a rear cavity are respectively arranged on both sides of the diaphragm in the shell, the front cavity is acoustically coupled with a sound outlet hole arranged on the shell, the sound outlet hole is arranged toward the external auditory canal of the user, and the rear cavity is acoustically coupled with a pressure relief hole arranged in the shell; The ear hook comprises a first part and a second part, wherein the first part is hung between the auricle of the user and the head of the user, and the second part extends to the side of the auricle of the user away from the head of the user and is connected to the sound-emitting part, so as to place the sound-emitting part near the external auditory canal of the user but not blocking the opening of the ear canal of the user; One or more microphones, disposed on the ear hook, configured to collect ambient sound to generate corresponding electrical signals; A processing circuit is used to amplify the electrical signal generated by the microphone and send the processed electrical signal to the sound-generating part, and the sound-generating part generates sound under the action of the electrical signal; wherein, At least one of the one or more microphones is located in the first part of the ear hook, and a line connecting the at least one microphone and the sound outlet passes through the user's auricle.

2. The sound-generating device according to claim 1, characterized in that: The one or more microphones include a first microphone, and a ratio of a distance from the first microphone to the centroid of the sound outlet hole to a distance from the first microphone to the centroid of the pressure relief hole may be in a range of 0.8 to 1.

2.

3. The sound generating device according to claim 1, characterized in that: The one or more microphones include a first microphone, a line connecting the centroid of the sound outlet hole and the centroid of the pressure relief hole has a midpoint and a perpendicular bisector defining the midpoint, and an angle between a line connecting the midpoint and the first microphone and the perpendicular bisector is -60° to 60°.

4. The sound generating device according to claim 1, characterized in that: 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 auricle, and the absolute value of the difference between the distance from the first microphone to the first contact point and the distance from the first microphone to the second contact point is less than 1 mm.

5. The sound generating device according to claim 1, characterized in that: The one or more microphones include a first microphone, the ear hook has an outermost end in the long axis direction of the sound-emitting part, the outermost end is the tangent point of the outer tangent plane on the outer contour of the ear hook that is perpendicular to the long axis direction of the sound-emitting part, and the distance between the first microphone and the outermost end is not greater than 2 mm.

6. The sound generating device according to claim 1, characterized in that: The one or more microphones include a first microphone, the first microphone is arranged at a first position of the ear hook, and the cross-sectional area of ​​the ear hook at the first position is 75 mm 2 ~250mm 2 .

7. The sound generating device according to claim 1, characterized in that: The one or more microphones include a first microphone, the first part of the ear hook includes a storage compartment, and the processing circuit and the first microphone are both disposed in the storage compartment.

8. The sound generating device according to claim 1, characterized in that: The one or more microphones include a first microphone, and a distance between the first microphone and an ear hook plane of the ear hook is greater than 10 mm.

9. The sound generating device according to claim 1, characterized in that: The one or more microphones include a second microphone and a third microphone, 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 the connection line between the third microphone and the sound outlet passes through the user's auricle.

10. The sound generating device according to claim 9, characterized in that: The projection of the ear hook on the user's sagittal plane includes an outer contour, and the outer contour has an extreme point in the short axis direction of the projection of the sound-emitting part on the sagittal plane, and the projection of the second microphone on the sagittal plane and the projection of the third microphone on the sagittal plane are respectively located on both sides of the extreme point.

11. The sound generating device according to claim 9, characterized in that: The second microphone is located in front of the user's auricle.

12. The sound generating device according to claim 9, characterized in that: In the wearing state, the projection of the second microphone on the sagittal plane of the user is located outside the projection of the user's auricle on the sagittal plane of the user.

13. The sound generating device according to claim 9, characterized in that: When worn, the angle between the line connecting the second microphone and the third microphone and the sagittal axis of the user is -10° to 10°.

14. The sound generating device according to claim 9, characterized in that: The angle between the connecting line of the second microphone and the third microphone and the long axis direction of the sound-emitting part is -30° to 30°.

15. The sound generating device according to claim 9, characterized in that: The distance between the second microphone and the third microphone is 5 mm to 20 mm.

16. The sound generating device according to claim 9, characterized in that: The projection of the ear hook on the user's sagittal plane includes an outer contour and an inner contour. Compared with the inner contour, the projection of the second microphone on the sagittal plane and the projection of the third microphone on the sagittal plane are both arranged closer to the outer contour.

17. The sound generating device according to claim 9, characterized in that: The sound radiated from the sound outlet and the pressure relief hole to the far field of the sound-emitting device is directional. Within the target frequency range, the absolute value of the difference in sound pressure levels at two far-field positions of the sound-emitting device in a specific direction and in the opposite direction is not less than 6dB. The line connecting the sound outlet and the pressure relief hole defines the specific direction.

18. The sound generating device according to claim 17, characterized in that: A line connecting the centroid of the sound outlet hole and the centroid of the pressure relief hole has a midpoint, and an angle between a line connecting the second microphone and the midpoint and a line connecting the centroid of the sound outlet hole and the centroid of the pressure relief hole is 0° to 30°.

19. The sound generating device according to claim 17, characterized in that: A line connecting the centroid of the sound outlet hole and the centroid of the pressure relief hole has a midpoint, and an angle between a line connecting the third microphone and the midpoint and a line connecting the centroid of the sound outlet hole and the centroid of the pressure relief hole is -30° to 0°.

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