Open hearing aid

Abstract

Embodiments of the present description provide an open hearing aid. The open hearing aid is entirely located below the triangular fossa of a wearer. The open hearing aid comprises: a sound production portion, configured to be located in the cavity of concha of the wearer, without blocking an opening of ear canal, the sound production portion comprising a housing and a diaphragm provided in the housing, wherein in the housing, a front cavity and a rear cavity are respectively provided on two sides of the diaphragm, the front cavity is acoustically coupled to a sound outlet hole provided on the housing, and the rear cavity is acoustically coupled to a pressure relief hole provided on the housing; an abutting portion, configured to abut against the back of the wearer's ear; an ear hook, configured to go around the wearer's antihelix and helix and connect the sound production portion and the abutting portion; one or more microphones, configured to collect ambient sound to generate a corresponding electrical signal; and a processor, configured to amplify the electrical signal generated by the one or more microphones and send the processed electrical signal to the sound production portion, the sound production portion producing sound under the action of the electrical signal.

Description

An open-back hearing aid Cross-references

[0001] This application claims priority to Chinese application No. 202410940454.0, filed on July 12, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This manual relates to the field of sound-producing devices, and in particular to an open-type hearing aid. Background Technology

[0003] Hearing aids are primarily used to help people with hearing loss or hearing impairment to hear sounds and communicate better in their daily lives. Common hearing aids often suffer from problems such as large size, lack of stability leading to slippage, inconvenience in wearing, and low wearing comfort.

[0004] Therefore, it is necessary to propose an open-back hearing aid that clips onto the wearer's earlobe to improve the user experience. Summary of the Invention

[0005] This specification provides one or more embodiments of an open-back hearing aid, the open-back hearing aid being located entirely below the triangular fossa of the wearer. The open-back hearing aid includes: a sound-emitting part configured to be located in the concha of the wearer but not blocking the ear canal opening; the sound-emitting part including: a housing and a diaphragm disposed within the housing; within the housing, a front cavity and a rear cavity are respectively provided on both sides of the diaphragm; the front cavity is acoustically coupled to a sound outlet disposed on the housing; and the rear cavity is acoustically coupled to a pressure relief hole disposed on the housing; an abutment portion configured to abut against the back of the wearer's ear; an ear hook configured to bypass the antihelix and helix of the wearer and connect the sound-emitting part and the abutment portion; one or more microphones configured to collect ambient sound to generate corresponding electrical signals; and a processor configured to amplify the electrical signals generated by the one or more microphones and send the processed electrical signals to the sound-emitting part, the sound-emitting part generating sound under the action of the electrical signals.

[0006] In some embodiments, the one or more microphones include a first microphone, the first microphone being acoustically connected to a first sound-receiving hole, and the ratio of the distance between the centroid of the first sound-receiving hole and the centroid of the first sound-receiving hole to the distance between the centroid of the first sound-receiving hole and the pressure relief hole is within a preset ratio range.

[0007] In some embodiments, the preset ratio ranges from 0.8 to 1.75.

[0008] In some embodiments, the preset ratio ranges from 0.9 to 1.5.

[0009] In some embodiments, the one or more microphones include a first microphone, the first microphone being acoustically connected to a first sound-receiving hole, the first sound-receiving hole being disposed on the abutment portion or on the ear hook, and the line connecting the first sound-receiving hole and the sound-emitting hole passing through the wearer's auricle.

[0010] In some embodiments, the one or more microphones further include a second microphone, the second microphone being acoustically connected to a second sound-receiving hole, the second sound-receiving hole being disposed on the abutment portion or on the ear hook in a region near the abutment portion, and the line connecting the second sound-receiving hole and the sound-emitting hole passing through the wearer's auricle.

[0011] In some embodiments, when the wearer wears the open-back hearing aid, the angle between the line connecting the first and second sound holes and the horizontal plane ranges from -40° to 40°.

[0012] In some embodiments, when the wearer wears the open-back hearing aid, the angle between the line connecting the first and second sound holes and the wearer's coronal axis ranges from -30° to 30°.

[0013] In some embodiments, the one or more microphones further include a second microphone, which is acoustically connected to a second sound-receiving hole, and the ratio of the distance between the centroid of the second sound-receiving hole and the centroid of the second sound-receiving hole to the distance between the centroid of the second sound-receiving hole and the pressure relief hole is within a preset ratio range.

[0014] In some embodiments, when the wearer wears the open-back hearing aid, the angle between the line connecting the first and second sound holes and the wearer's sagittal axis ranges from -35° to 35°.

[0015] In some embodiments, the one or more microphones include a first microphone and a second microphone, and the processor is further configured to: gain the first electrical signal and the second electrical signal, wherein the first electrical signal is an electrical signal generated by the first microphone, and the gain provided by the processor for the first electrical signal and the second electrical signal is related to the length of the acoustic path from the first microphone aperture to the sound output aperture and the length of the acoustic path from the second microphone aperture to the sound output aperture, wherein the first microphone is acoustically connected to the first microphone aperture and the second microphone is acoustically connected to the second microphone aperture; and perform differential processing on the gained first electrical signal and the gained second electrical signal.

[0016] In some embodiments, the first microphone is disposed on the side of the wearer's auricle closer to the ear canal, the second microphone is disposed on the side of the wearer's auricle away from the ear canal, the length of the acoustic path from the first microphone hole to the sound outlet hole is less than the length of the acoustic path from the second microphone hole to the sound outlet hole, and the gain provided by the processor for the first electrical signal is less than the gain provided for the second electrical signal.

[0017] In some embodiments, the one or more microphones include a microphone array consisting of at least two microphones, and the processor is further configured to: adjust the directivity of the microphone array when collecting ambient sound, such that the sound intensity from the direction of the sound outlet in the ambient sound received by the microphone array is always less than the sound intensity from other directions in the environment.

[0018] In some embodiments, the one or more microphones include a microphone array consisting of at least two microphones, and the processor is further configured to: filter target microphones in the microphone array and collect ambient sounds through the target microphones to generate corresponding electrical signals.

[0019] In some embodiments, the one or more microphones include a microphone array consisting of at least two microphones, and the processor is further configured to: identify electrical signals generated by the microphone array, determine the current usage scenario of the open-back hearing aid, and determine a target microphone in the microphone array based on the current usage scenario of the open-back hearing aid.

[0020] In some embodiments, the one or more microphones include a microphone array consisting of at least two microphones, the abutment includes an accelerometer configured to acquire motion data of the wearer; the processor is further configured to: determine a target microphone in the microphone array when the motion data meets preset motion conditions, wherein the motion data meeting the preset motion conditions indicates that the wearer is in a state of motion.

[0021] In some embodiments, the one or more microphones include a first set of microphones located near the wearer's left ear and a second set of microphones located near the wearer's right ear. When the wearer wears the open-back hearing aid, the first set of microphones and the second set of microphones together construct a directional sound field pointing in a specific direction of space.

[0022] In some embodiments, the ear hook has a first plane of symmetry, and the one or more microphones include a first microphone, with a first sound-receiving hole acoustically connected to the first microphone offset from the first plane of symmetry.

[0023] In some embodiments, the ear hook has a first symmetry plane, and the one or more microphones include a first microphone and a second microphone. A first sound-receiving hole acoustically connected to the first microphone and a second sound-receiving hole acoustically connected to the second microphone are both offset from the first symmetry plane.

[0024] In some embodiments, the distance between the centroids of the sound-receiving holes and the sound-emitting holes of the one or more microphones is within 6 to 20 mm.

[0025] In some embodiments, the abutment is a cylindrical structure, the ear hook is connected to the side of the abutment, and one or more microphones are disposed on the end face of the cylindrical structure along the axial direction of the cylindrical structure. For each microphone, the distance between the microphone's sound hole and the centroid of the end face on which the microphone is disposed is less than 7 mm.

[0026] In some embodiments, the sound-emitting part includes a first sound-emitting part located in the wearer's left ear and a second sound-emitting part located in the wearer's right ear, and the processor is further configured to: determine the direction of the ambient sound source; adjust the phase of the electrical signals generated by the one or more microphones based on the direction of the sound source to obtain a first sound signal and a second sound signal, wherein there is a phase difference between the first sound signal and the second sound signal; send the first sound signal and the second sound signal to the first sound-emitting part and the second sound-emitting part respectively, wherein the first sound-emitting part generates sound under the action of the first sound signal, and the second sound-emitting part generates sound under the action of the second sound signal.

[0027] In some embodiments, the one or more microphones include a microphone array consisting of at least two microphones, and the processor is further configured to: filter a target electrical signal from the electrical signals generated by each microphone in the microphone array, wherein the target electrical signal is the electrical signal with the highest sound pressure level of the ambient sound among the electrical signals generated by each microphone; determine the microphone corresponding to the target electrical signal as a first sound source microphone; and determine the sound source direction of the ambient sound based on the position of the first sound source microphone in the microphone array.

[0028] In some embodiments, the one or more microphones include a first set of microphones located in the wearer's left ear and a second set of microphones located in the wearer's right ear. The processor is further configured to: filter the first set of electrical signals and the second set of electrical signals for the ambient sound with a higher sound pressure level, wherein the first set of electrical signals is generated by the first set of microphones collecting the ambient sound, and the second set of electrical signals is generated by the second set of microphones collecting the ambient sound; determine the microphone corresponding to the filtered electrical signal as the second sound source microphone; and determine the sound source direction of the ambient sound based on the position of the second sound source microphone relative to the wearer. Attached Figure Description

[0029] This specification will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting; in these embodiments, the same reference numerals denote the same structures, wherein:

[0030] Figure 1 is a schematic diagram of an ear according to some embodiments of this specification;

[0031] Figure 2 is an exemplary block diagram of an open-type hearing aid according to some embodiments of this specification;

[0032] Figure 3 is a structural schematic diagram of an open-type hearing aid according to some embodiments of this specification;

[0033] Figure 4 is a schematic diagram of wearing an open-type hearing aid according to some embodiments of this specification;

[0034] Figure 5 is another schematic diagram of an open-type hearing aid according to some embodiments of this specification;

[0035] Figure 6A is a schematic diagram of wearing another open-fit hearing aid according to some embodiments of this specification;

[0036] Figure 6B is a schematic diagram of wearing another open-fit hearing aid according to some embodiments of this specification;

[0037] Figure 7A is a schematic diagram of wearing another open-fit hearing aid according to some embodiments of this specification;

[0038] Figure 7B is a schematic diagram of wearing another open-fit hearing aid according to some embodiments of this specification;

[0039] Figure 8 is a schematic diagram of wearing another open-fit hearing aid according to some embodiments of this specification;

[0040] Figure 9 is a schematic diagram of the wearing angle of another open-type hearing aid according to some embodiments of this specification;

[0041] Figure 10 is a schematic diagram of wearing another open-fit hearing aid according to some embodiments of this specification;

[0042] Figure 11 is a schematic diagram of wearing another open-fit hearing aid according to some embodiments of this specification;

[0043] Figure 12 is a schematic diagram of wearing another open-fit hearing aid according to some embodiments of this specification;

[0044] Figure 13 is a schematic diagram of the directivity of a microphone in an open-back hearing aid according to some embodiments of this specification. Detailed Implementation

[0045] To more clearly illustrate the technical solutions of the embodiments in this specification, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this specification. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0046] It should be understood that the terms “system,” “device,” “unit,” and / or “module” used herein are one way to distinguish different components, elements, parts, sections, or assemblies at different levels. However, if other terms can achieve the same purpose, they may be replaced by other expressions.

[0047] As indicated in this specification and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0048] Flowcharts are used in this specification to illustrate the operations performed by the system according to embodiments of this specification. It should be understood that the preceding or following operations are not necessarily performed in exact order. Instead, the steps can be processed in reverse order or simultaneously. Furthermore, other operations can be added to these processes, or one or more steps can be removed from them.

[0049] Figure 1 is a schematic diagram of an exemplary ear according to some embodiments of this specification.

[0050] Referring to Figure 1, the ear 100 (also referred to as the auricle) may include the external auditory canal 101, the concha 102, the cymba concha 103, the triangular fossa 104, the antihelix 105, the scaphoid fossa 106, the helix 107, the earlobe 108, the tragus 109, and the crus of the helix 1071. In some embodiments, the hearing aid can be stably worn by supporting it with one or more parts of the ear 100. The external auditory canal 101, the concha 102, the cymba concha 103, the triangular fossa 104, etc., have a certain depth and volume in three-dimensional space, which can be used to meet the wearing requirements of the hearing aid. For example, a hearing aid (e.g., an open-back hearing aid) can be worn in the external auditory canal 101. In some embodiments, the hearing aid can be worn by using other parts of the ear 100 besides the external auditory canal 101. For example, hearing aids can be worn using parts such as the cymba conchae 103, triangular fossa 104, antihelix 105, scaphoid fossa 106, and helix 107, or combinations thereof. In some embodiments, to improve the comfort and reliability of the hearing aid during wear, parts such as the user's earlobe 108 can also be used. By using parts of the ear 100 other than the external auditory canal 101 to achieve the wearing of the hearing aid and the propagation of sound, the user's external auditory canal 101 can be "liberated". In some embodiments, the hearing aid can be designed to fit the ear 100 according to its structure, so that the sound-producing part of the hearing aid can be worn in different positions on the ear. For example, when the hearing aid is an open-back hearing aid, the open-back hearing aid may include a sound-producing part, an abutment part, and an ear hook. The ear hook has an arc-shaped structure that can bypass the wearer's antihelix 105 and helix 107 and connect the sound-producing part and the abutment part, so that the sound-producing part is located in the wearer's concha cavity 102 but does not block the ear canal opening, and the abutment part abuts against the back of the wearer's ear.

[0051] Individual differences may exist among users, resulting in variations in ear shape, size, and other characteristics. For ease of description and understanding, unless otherwise specified, this manual will primarily use an ear model with a "standard" shape and size as a reference to further describe how hearing aids in different embodiments are worn on this ear model. For example, a simulator containing the head and its (left and right) ears, such as the GRAS 45BC KEMAR, can be manufactured based on ANSI:S3.36, S3.25 and IEC:60318-7 standards as a reference for hearing aid wearing, thus representing the scenario of most users normally wearing hearing aids. As an example only, the reference ear may have the following characteristics: the projection of the auricle in the sagittal plane in the vertical axis direction can be in the range of 49.5mm-74.3mm, and the projection of the auricle in the sagittal plane in the sagittal axis direction can be in the range of 36.6mm-55mm. Therefore, descriptions such as "worn by the wearer," "in a wearing state," and "under wearing condition" in this specification refer to the hearing aid described in this specification being worn on the ear of the aforementioned simulator. Of course, considering individual differences among users, the structure, shape, size, thickness, etc., of one or more parts of the ear 100 may vary to some extent. To meet the needs of different users, hearing aids can be designed with differentiation in mind. These differentiations can manifest as the characteristic parameters of one or more structures in the hearing aid (e.g., the sound-producing part, ear hook, etc., mentioned below) having different ranges of values ​​to adapt to different ears.

[0052] It should be noted that in medicine, anatomy, and other fields, the human body can be defined by three basic planes: 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. The sagittal plane is a section perpendicular to the ground along the anteroposterior direction of the body (e.g., from the chest to the back), dividing the body into left and right parts. The coronal plane is a section perpendicular to the ground along the lateral direction of the body (e.g., from the left shoulder to the right shoulder), dividing the body into anterior and posterior parts. The horizontal plane is a section parallel to the ground along the vertical direction of the body (e.g., from the top of the head to the soles of the feet), dividing the body into superior and inferior parts. Correspondingly, the sagittal axis is the axis along the anteroposterior direction of the body and perpendicular to the coronal plane; the coronal axis is the axis along the lateral direction of the body and perpendicular to the sagittal plane; and the vertical axis is the axis along the vertical direction of the body and perpendicular to the horizontal plane. Among them, by observing the ear of the simulator along the direction of the human coronal axis, a schematic diagram of the front outline of the ear as shown in Figure 1 can be obtained.

[0053] Figure 2 is an exemplary block diagram of an open-back hearing aid according to some embodiments of this specification. Figure 3 is a structural schematic diagram of an open-back hearing aid according to some embodiments of this specification.

[0054] In some embodiments, the open-back hearing aid 200 can be a clip-on hearing aid. When worn, the open-back hearing aid 200 clips onto the wearer's helix and antihelix, and is positioned below the wearer's triangular fossa. "Below the wearer's triangular fossa" refers to being below the wearer's vertical axis; further details regarding the vertical axis can be found in the relevant description below this specification. The open-back hearing aid 200 can collect ambient sound and amplify it for the wearer to hear. As shown in Figure 2, the open-back hearing aid 200 may include a sound-emitting part 210, an abutment part 220, an ear hook 230, one or more microphones 240, and a processor 250.

[0055] The sound-emitting part 210 is used for sound playback. The sound-emitting part 210 can convert the received electrical signal into sound and play the sound to the wearer.

[0056] In some embodiments, the sound-generating part 210 may include a housing 211 and a diaphragm disposed within the housing.

[0057] The housing 211 may be a frame with a hollow structure, forming a cavity to accommodate other components of the sound-generating part 210 (e.g., a diaphragm). In some embodiments, the housing 211 may include two rigid housings that enclose the cavity. One of the rigid housings faces the wearer's concha and contacts the concha wall, while the other rigid housing is connected to the ear hook 230. The rigid housing may be made of plastic, metal, or other materials that can be used as support materials for the housing 211 to provide better support and stability for the internal structure of the housing 211 (e.g., the diaphragm). In some embodiments, the housing 211 may also include a flexible housing. The outer surface of the rigid housing that contacts the wearer's concha wall may be covered with a flexible housing. The flexible housing may be made of silicone, rubber, etc. The flexible housing can improve the comfort of wearing the open-back hearing aid 200 and the fit between the open-back hearing aid 200 and the user's ear (e.g., the concha). The housing 211 may be a sphere, cube, cuboid, or other shape.

[0058] As shown in Figures 3 and 4, the housing 211 may include a sound outlet 2111 and a pressure relief hole 2112. The aforementioned sound outlet 2111 discharges the sound generated by the sound-emitting part 210. In some embodiments, the sound outlet 2111 may be oriented towards the wearer's ear canal opening. In some embodiments, the sound outlet 2111 may not be oriented towards the wearer's ear canal opening.

[0059] The pressure relief port 2112 balances the pressure in the rear cavity, allowing the diaphragm to vibrate fully at low frequencies with large amplitude, thus producing a sound with deep bass and penetrating treble. More information about the diaphragm and rear cavity can be found in the relevant descriptions later in this manual. Correspondingly, the pressure relief port 2112 can be positioned away from the wearer's ear canal.

[0060] The outer end faces of the sound outlet 2111 and the pressure relief hole 2112 can be strip-shaped (e.g., elongated), circular (e.g., circular or elliptical), or other arbitrary shapes. The outer end face can refer to the end face corresponding to the hole located on the outer wall surface of the housing 211. In some embodiments, the sound outlet 2111 and / or the pressure relief hole 2112 can be centrally located on the housing 211 or offset from it. When the sound outlet 2111 and / or the pressure relief hole 2112 are centrally located on the housing 211, the outer end faces of the corresponding holes are symmetrical about the biplane of the bottom surface of the housing 211. The bottom surface of the housing 211 refers to the side opposite to the end face connecting the housing 211 and the ear hook 230. In the wearing state, the bottom surface of the housing 211 faces the wearer's ear canal (e.g., external auditory canal 101). The bisecting plane of the bottom surface refers to a plane parallel to the extension direction of the ear hook 230 (or, it can also be a plane parallel to or coincident with the first symmetry plane 300 of the ear hook 230 as described later), and this plane divides the bottom surface of the housing 211 into two symmetrical (or approximately symmetrical) parts. When the sound outlet 2111 and / or the pressure relief hole 2112 can be offset on the housing 211, the outer end face of the corresponding hole is asymmetrical about the bisecting plane of the bottom surface of the housing 211. For example, the sound outlet 2111 is located on one side of the symmetry plane of the ear hook 230 (such as the first symmetry plane 300 as described later).

[0061] The diaphragm is used to convert electrical signals into sound through vibration. Inside the housing 211, a front cavity and a rear cavity are respectively provided on both sides of the diaphragm. The front cavity is acoustically coupled to the sound outlet 2111, and the rear cavity is acoustically coupled to the pressure relief hole 2112. The sound generated by the diaphragm in the front cavity and the rear cavity is transmitted to the outside through the sound outlet 2111 and the pressure relief hole 2112, respectively.

[0062] As shown in Figure 4, when the open-back hearing aid 200 is worn, the sound-emitting part 210 is located in the concha cavity of the wearer but does not block the ear canal opening, and fits against the concha cavity wall. In some embodiments, in order to match the shape of the concha cavity, the outer shape of the shell 210 in the sound-emitting part 210 can be close to the shape of the concha cavity, and is spherical, quasi-spherical or spindle-shaped, so that the sound-emitting part 210 is in full contact with the concha cavity wall, and is clamped on both sides of the concha cavity with the abutment part 220. The sound-emitting part 210, the abutment part 220 and the ear hook 230 cooperate to clamp the helix and antihelix of the wearer.

[0063] The abutment portion 220 abuts against the back of the wearer's ear. For example, the abutment portion 220 may abut against the back of the concha. The abutment portion 220 may have an abutment shell, through which the abutment portion 220 is connected to the ear hook 230. The abutment shell may form a receiving space. The abutment portion 220 may be a sphere, cylinder, cube, cuboid, or other shape.

[0064] In some embodiments, a button is provided on the abutment portion 220. The button can be used to control the open-back hearing aid 200, for example, to control the on / off state, volume, etc. of the open-back hearing aid 200. The receiving space of the abutment housing can accommodate circuit components, which may include a circuit board and wires. These circuit components can electrically connect the button to the button and other components of the open-back hearing aid 200 (e.g., the sound-emitting portion 210, microphone 240, etc.) to facilitate button control of the open-back hearing aid 200.

[0065] Understandably, to facilitate button operation, the button area cannot be too small, thus requiring a corresponding shell area. Placing the button on the sound-emitting part 210 might increase its size, reducing wearing comfort. Placing it on the ear hook 230 might increase its size, affecting the comfort of the open-fit hearing aid 200. Furthermore, the lack of support at the ear hook 230 location could affect the stability of the hearing aid 200 when the button is used. The relatively large space behind the ear facilitates control of the hearing aid 200. Placing the button on the abutment part 220 reduces the size of other components, improving wearing comfort. Additionally, placing the button on the abutment part 220 allows the back of the ear to support it, preventing any impact on the stability of the hearing aid 200.

[0066] In some embodiments, the abutment portion 220 may further include a battery, which is removably disposed within the abutment portion 220. The battery can provide power to the open-back hearing aid 200. For example, the battery may be electrically connected to the sound-generating portion 210 so that it can provide power to the sound-generating component. The receiving space of the aforementioned abutment housing may also include a battery compartment, which can accommodate a removable battery.

[0067] Understandably, placing the battery in the sound-emitting part 210 would increase its size, reducing wearing comfort. Similarly, placing the button on the ear hook 230 would increase its size and weight, affecting the comfort and stability of the open-fit hearing aid 200. Some embodiments in this specification, by placing the battery in the abutment part 220, reduce the size of other components, improving the comfort and stability of the open-fit hearing aid 200. Furthermore, by making the battery removable, it is convenient to charge multiple batteries interchangeably, ensuring continuous use of the open-fit hearing aid 200.

[0068] As shown in Figure 4, the abutment part 220 and the sound-emitting part 210 cooperate to form a clamping shape to clamp the wearer's ear.

[0069] The ear hook 230 connects the sound-emitting part 210 and the abutment part 220. As shown in Figure 4, when worn, the ear hook 230 can bypass the wearer's antihelix 105 and helix 107, so that the sound-emitting part 210 is located in the wearer's concha cavity and contacts the concha cavity wall, and the abutment part 220 abuts against the back of the wearer's ear. The sound-emitting part 210, the abutment part 220 and the ear hook 230 work together to clamp the wearer's helix and antihelix, thereby completing the wearing of the open-type hearing aid 200.

[0070] In some embodiments, when worn, the angle between the first symmetrical plane 300 of the ear hook 230 and the horizontal plane is in the range of -45° to 45°, thereby ensuring the wearing stability of the open-fit hearing aid 200.

[0071] The ear hook 230 can be elastic, meaning that when the sound-emitting part 210 moves away from the abutment part 220, the ear hook 230 can provide an elastic force that drives the sound-emitting part 210 closer to the abutment part 220. In the wearing state, the elastic force of the ear hook 230 can be converted into a clamping force that holds the sound-emitting part 210 and the abutment part 220 together on both sides of the concha, ensuring wearing stability. In some embodiments, the ear hook 230 may include a titanium wire extending along its extension direction. Compared to other materials, titanium wire has excellent properties such as high mechanical strength, high toughness, and light weight, thereby ensuring the stability and comfort of wearing the open-fit hearing aid 200. In some embodiments, the ear hook 230 may include a titanium sheet extending along its extension direction. The surface of the titanium sheet may be perpendicular to the plane of symmetry of the ear hook 230 along its extension direction (i.e., the first plane of symmetry 300). During or while wearing the hearing aid, the titanium plate can reduce or prevent torsion of the ear hook 230, thereby further improving the stability and comfort of wearing the open-fit hearing aid 200. The aforementioned first symmetry plane 300 can be a symmetry plane along the extension direction of the ear hook 230, where the extension direction refers to the direction from the end of the ear hook 230 connected to the abutment portion 220 to the end of the ear hook 230 connected to the sound-emitting portion 210. As shown in Figure 5, the first symmetry plane 300 is parallel or substantially parallel to the extension direction of the ear hook 230. The first symmetry plane 300 can divide the ear hook 230 into two symmetrical or approximately symmetrical parts.

[0072] Microphone 240 is used to collect ambient sound to generate corresponding electrical signals. In some embodiments, the open-back hearing aid 200 may include one microphone 240. In some embodiments, as shown in FIG2, the open-back hearing aid 200 may also include multiple microphones 240, such as microphone 1, ... microphone n. For example, the open-back hearing aid 200 may include two microphones 240. As another example, the open-back hearing aid 200 may also include a microphone array consisting of multiple microphones 240 (e.g., three or more microphones).

[0073] The microphone 240 may include a microphone aperture 241. The microphone 240 may be acoustically connected to the microphone aperture 241. The microphone aperture 241 is used to connect the microphone 240 to the external environment so that the microphone 240 can collect ambient sound.

[0074] The microphone 240 may also include an acoustic-to-electrical converter. The acoustic-to-electrical converter is used to convert the collected ambient sound into electrical signals that are easy to transmit.

[0075] The microphone 241 and the acoustic-to-electrical converter can be located in the same or different components of the open-back hearing aid 200. For example, both the microphone 241 and the acoustic-to-electrical converter can be located in the abutment portion 220. Alternatively, the microphone 241 can be located on the ear hook 230, and the acoustic-to-electrical converter can be located in the abutment portion 220, with the two connected by a cavity.

[0076] In some embodiments, the sound-to-electric conversion element can be disposed at various locations within the open-back hearing aid 200. For example, the sound-to-electric conversion element can be disposed in the sound-emitting part 210, the contact part 220, or the ear hook 230.

[0077] It is understandable that the sound-emitting part 210 is used to play sound, while the microphone 240 is used to collect sound. If the sound played by the sound-emitting part 210 is collected by the microphone 240, it will cause an echo feedback loop, resulting in howling and affecting the user's experience.

[0078] In some embodiments, the distance between the centroids of the microphone 240's receiving port 241 and the sound output port 2111 is within a preset distance range. In some embodiments, the preset distance range can be 6–20 mm. In some embodiments, the preset distance range can be 12–20 mm. In some embodiments, the preset distance range can be 14–18 mm.

[0079] Some embodiments in this specification limit the distance between the centroids of the microphone 240's receiving hole 241 and the sound output hole 2111. This can prevent echoes from occurring because the distance between the microphone 240's receiving hole 241 and the sound output hole 2111 is too close. At the same time, it can also prevent the distance between the microphone 240's receiving hole 241 and the sound output hole 2111 from being too far, which would result in the open-type hearing aid 200 being too large and reducing wearing comfort.

[0080] Some embodiments in this specification allow for different settings of the position of the microphone 240's pickup hole 241 under various conditions, thereby preventing the sound emitted by the sound-emitting part 210 from being collected by the microphone 240 again, reducing echo feedback loops, lowering the risk of howling, and improving the user experience. For more information on how to set the position of the pickup hole 241, please refer to the relevant description below.

[0081] Microphone 240 can be electrically connected to processor 250 and transmit the electrical signals generated by microphone 240 to processor 250. Processor 250 can amplify the electrical signals generated by microphone 240 and send the processed electrical signals to sound-emitting part 210. Processor 250 can be located in any component of open-fit hearing aid 200. For example, processor 250 can be located in sound-emitting part 210, abutment part 220, or ear hook 230.

[0082] In some embodiments of this specification, the open-fit hearing aid 200 can be clipped onto the wearer's earlobe. This design can reduce the size of the open-fit hearing aid 200, improve its comfort, ensure its stability, and facilitate daily maintenance.

[0083] The location of the microphone hole 241 will be described below in this manual.

[0084] In some embodiments, the open-back hearing aid 200 may include a microphone 240, which may be referred to as a first microphone for ease of explanation later, and the corresponding sound hole of the first microphone may be referred to as a first sound hole 2411.

[0085] In some embodiments, the ratio of the distance between the centroids of the first sound receiving hole 2411 and the sound output hole 2111 to the distance between the centroids of the first sound receiving hole 2411 and the pressure relief hole 2112 is within a preset ratio range. The centroid of the hole (e.g., the sound output hole 2111, the pressure relief hole 2112, etc.) is the centroid of the outer end face of the corresponding hole on the housing (e.g., housing 211). As shown in Figures 6A and 6B, the distance between the centroids N of the first sound receiving hole 2411 and the sound output hole 2111 is L1, and the distance between the centroids M of the first sound receiving hole 2411 and the pressure relief hole 2112 is L2. The aforementioned values ​​satisfy the following formula (1): Where 'a' represents a preset ratio range.

[0086] In some embodiments, the preset ratio range can be 0.8 to 1.75. In some embodiments, the preset ratio range can be 0.9 to 1.5. In some embodiments, the preset ratio range can be 1 to 1.2.

[0087] In some embodiments, when the ratio of the distance between the centroids of the first sound receiving hole 2411 and the sound output hole 2111 to the distance between the centroids of the first sound receiving hole 2411 and the pressure relief hole 2112 is within a preset ratio range, the first sound receiving hole 2411 can be disposed at multiple locations in the open-back hearing aid 200. For example, the first sound receiving hole 2411 can be located on the outer surface of the sound-emitting portion 210 in the open-back hearing aid 200 shown in FIG. 6A. As another example, the first sound receiving hole 2411 can also be located on the outer surface of the abutment portion 220 in the open-back hearing aid 200 shown in FIG. 6B.

[0088] In some embodiments, the difference between the centroid of the first sound receiving hole 2411 and the centroid of the sound output hole 2111 and the centroid of the first sound receiving hole 2411 and the pressure relief hole 2112 can be less than a preset distance threshold, so as to ensure that the difference between the centroid of the first sound receiving hole 2411 and the centroid of the sound output hole 2111 and the centroid of the pressure relief hole 2112 is small. For example, the preset distance threshold can be 3mm.

[0089] It is understood that the sound generated in the front cavity of the sound-emitting part 210 radiates outward through the sound outlet 2111, and the sound generated in the rear cavity of the sound-emitting part 210 radiates outward through the pressure relief hole 2112. Some embodiments of this specification limit the difference between the centroid of the first sound receiving hole 2411 and the centroid of the sound outlet 2111 and the centroid of the first sound receiving hole 2411 and the pressure relief hole 2112 by using a preset ratio range or a preset distance threshold. For example, the closer the aforementioned preset ratio range is to 1, the closer the distance between the centroid of the first sound receiving hole 2411 and the sound outlet 2111 and the centroid of the first sound receiving hole 2411 and the pressure relief hole 2112 are, and the smaller the difference between them. Similarly, the closer the aforementioned preset distance threshold is to 0, the closer the distance between the centroid of the first sound receiving hole 2411 and the sound outlet 2111 and the centroid of the first sound receiving hole 2411 and the pressure relief hole 2112 are, and the smaller the difference between them. By limiting the difference between the centroid of the first sound receiving hole 2411 and the centroid of the sound output hole 2111 and the centroid of the first sound receiving hole 2411 and the pressure relief hole 2112, it can be ensured that at the location of the first sound receiving hole 2411, the amplitudes of the sound radiated by the sound output hole 2111 and the sound radiated by the pressure relief hole 2112 are equal, or the difference in amplitude is less than a preset amplitude difference threshold and the phases are opposite. When the two sounds are transmitted to the location of the first sound receiving hole 2411, they will cancel each other out of phase, reducing the volume of the sound-emitting part 210 collected by the first sound receiving hole 2411, thereby avoiding echo, reducing the risk of howling, and improving the user experience.

[0090] In some embodiments, the first sound receiving hole 2411 is disposed on the abutment portion 220 or on the ear hook 230 in a region near the abutment portion 220, and the line connecting the first sound receiving hole 2411 and the sound output hole 2111 passes through the wearer's auricle. For example, as shown in FIG7A, the first sound receiving hole 2411 may be disposed on the abutment portion 220, and the line P1 connecting the first sound receiving hole 2411 and the sound output hole 2111 passes through the wearer's auricle. As another example, as shown in FIG7B, the first sound receiving hole 2411 may be disposed on the ear hook 230 in a region near the abutment portion 220, and the line P2 connecting the first sound receiving hole 2411 and the sound output hole 2111 passes through the wearer's auricle.

[0091] It is worth noting that when the line connecting the first sound receiving hole 2411 and the sound output hole 2111 passes through the wearer's auricle, the first sound receiving hole 2411 and the sound output hole 2111 are blocked by the wearer's auricle. The wearer's auricle can be regarded as a baffle. The sound emitted by the sound output hole 2111 needs to bypass the baffle before it can be collected by the first sound receiving hole 2411. This is equivalent to increasing the sound path from the sound output hole 2111 to the first sound receiving hole 2411. This can make the volume of the sound emitted by the sound output hole 2111 collected at the position of the first sound receiving hole 2411 smaller, thereby avoiding echo, reducing the risk of feedback, and improving the wearer's user experience.

[0092] In some embodiments, when the first microphone aperture 2411 is configured, the first microphone aperture 2411 may satisfy only one of the configuration limitations described above, or it may satisfy multiple configuration limitations. For example, the ratio of the distance between the centroid of the first microphone aperture 2411 and the centroid of the sound outlet aperture 2111 shown in FIG. 6A to the distance between the centroid of the first microphone aperture 2411 and the pressure relief aperture 2112 is within a preset ratio range. For example, as shown in Figure 6B, the ratio of the distance between the centroid of the first sound receiving hole 2411 and the centroid of the sound output hole 2111 to the distance between the centroid of the first sound receiving hole 2411 and the pressure relief hole 2112 is within a preset ratio range, and the difference between the distance between the centroid of the first sound receiving hole 2411 and the sound output hole 2111 and the distance between the centroid of the first sound receiving hole 2411 and the pressure relief hole 2112 is less than a preset distance threshold. At the same time, the lines connecting the first sound receiving hole 2411 to the sound output hole 2111 and the pressure relief hole 2112 pass through the wearer's ear 100, thereby preventing the first sound receiving hole 2411 from collecting the sound emitted by the sound output part 210 from multiple aspects, avoiding echoes, and reducing the risk of howling.

[0093] In some embodiments, when the open-back hearing aid 200 includes only the first microphone, the first microphone's first sound-receiving port 2411 may be offset from the first plane of symmetry 300. Further details regarding the first plane of symmetry 300 can be found in the preceding description of this specification.

[0094] In some embodiments, the first symmetry plane 300 can divide the first sound-receiving hole 2411 into two asymmetrical parts. In some embodiments, the first symmetry plane 300 does not divide the first sound-receiving hole 2411, and the first sound-receiving hole 2411 is located on one side of the first symmetry plane 300. For example, the first sound-receiving hole 2411 can be located above the first symmetry plane 300 along the vertical axis so that the first sound-receiving hole 2411 can better pick up ambient sounds from above. As another example, the first sound-receiving hole 2411 can be located below the first symmetry plane 300 along the vertical axis so that the first sound-receiving hole 2411 can better pick up ambient sounds from below. Furthermore, when the first sound-receiving hole 2411 is located below the first symmetry plane 300 along the vertical axis, when the wearer moves, the first sound-receiving hole 2411 can be blocked by other structures (e.g., the auricle, other components of the open-back hearing aid 200), thereby reducing wind noise and improving the wearer's user experience.

[0095] In some embodiments, when the first microphone aperture 2411 is configured, the first microphone is symmetrically configured based on a first symmetry plane 300. For example, the first symmetry plane 300 may divide the first microphone aperture 2411 into two symmetrical portions.

[0096] Some embodiments in this specification, by incorporating a microphone 240, i.e., a first microphone, into the open-fit hearing aid 200, can avoid excessively high costs, reduce the size of the open-fit hearing aid 200, and thus improve the wearing comfort of the open-fit hearing aid. Furthermore, by restricting the placement of the first microphone's first sound-receiving hole 2411, the amount of sound collected by the first sound-receiving hole 2411 from the sound-emitting part 210 can be reduced, thereby lowering the risk of feedback.

[0097] In some embodiments, the open-back hearing aid 200 may include two microphones 240. For ease of explanation later, these two microphones 240 may be referred to as a first microphone and a second microphone. The sound-receiving port corresponding to the first microphone may be referred to as a first sound-receiving port 2411, and the sound-receiving port corresponding to the second microphone may be referred to as a second sound-receiving port 2412. By providing two microphones on the open-back hearing aid 200, the two microphones can collect ambient sounds from different directions, improving the efficiency of sound pickup. Furthermore, a dual-microphone algorithm can be used to set a more ideal field distribution than a single-microphone algorithm.

[0098] In some embodiments, the first sound receiving hole 2411 may be located on the abutment portion 220 or on the ear hook 230 near the abutment portion 220. The line connecting the first sound receiving hole 2411 and the sound output hole 2111 passes through the wearer's auricle. The second sound receiving hole 2412 may also be located on the abutment portion 220 or on the ear hook 230. The line connecting the second sound receiving hole 2412 and the sound output hole 2111 also passes through the wearer's auricle. This can increase the sound path of the sound emitted from the sound output hole 2111 to the first sound receiving hole 2411 and the second sound receiving hole 2412, reduce the volume of the sound emitted from the sound output hole 2111 collected at the position of the first sound receiving hole 2411, avoid echo, and reduce the risk of howling. For example, as shown in Figure 8, the first sound receiving hole 2411 is located on the ear hook 230 near the abutment portion 220. The line P3 connecting the first sound receiving hole 2411 and the sound output hole 2111 passes through the wearer's auricle. The second sound receiving hole 2412 is located on the abutment portion 220. The line P4 connecting the second sound receiving hole 2412 and the sound output hole 2111 also passes through the wearer's auricle.

[0099] In some embodiments, when the wearer wears the open-back hearing aid 200, there is a first angle between the line connecting the first sound receiving hole 2411 and the second sound receiving hole 2412 and the horizontal plane. For example, the ear 100 shown in FIG9 is a view behind the wearer's ear, and when the wearer wears the open-back hearing aid 200, there is a first angle α between the line connecting the first sound receiving hole 2411 and the second sound receiving hole 2412 and the horizontal plane.

[0100] In some embodiments, the first included angle ranges from -40° to 40°. In some embodiments, the first included angle ranges from -30° to 30°. In some embodiments, the first included angle ranges from -15° to 15°.

[0101] In some embodiments of this specification, there is a first angle between the line connecting the first sound receiving hole 2411 and the second sound receiving hole 2412 and the horizontal plane. By limiting the angle of the first angle, the open-type hearing aid 200 can better receive sound at the same height as the wearer's ear, thereby improving its sound pickup efficiency.

[0102] In some embodiments, when the wearer wears the open-back hearing aid 200, there is a second angle between the line connecting the first sound hole 2411 and the second sound hole 2412 and the wearer's coronal axis.

[0103] For example, as shown in Figure 10, when the wearer wears the open-type hearing aid 200, there is a second included angle β between the line connecting the first sound hole 2411 and the second sound hole 2412 and the wearer's coronal axis.

[0104] In some embodiments, the second included angle ranges from -30° to 30°. In some embodiments, the second included angle ranges from -20° to 20°. In some embodiments, the second included angle ranges from -10° to 10°.

[0105] In some embodiments of this specification, there is a second angle between the line connecting the first sound receiving hole 2411 and the second sound receiving hole 2412 and the wearer's coronal axis. By limiting the angle of the second angle, the open-fit hearing aid 200 can better receive ambient sounds from the wearer's left and right sides, enrich the pickup direction of the open-fit hearing aid 200, and make the sound picked up by the open-fit hearing aid 200 more in line with the listening experience of normal people (i.e., people with unimpaired hearing).

[0106] The first included angle is used to limit the tilt angle of the line connecting the first sound receiving hole 2411 and the second sound receiving hole 2412 relative to the horizontal plane, and the second included angle is used to limit the tilt angle of the line connecting the first sound receiving hole 2411 and the second sound receiving hole 2412 relative to the coronal axis. In some embodiments, the line connecting the first sound receiving hole 2411 and the second sound receiving hole 2412 may only satisfy one of the aforementioned tilt relationships to facilitate sound pickup from the corresponding direction. It is understood that since the aforementioned two tilt relationships limit the tilt angle of the line connecting the first sound receiving hole 2411 and the second sound receiving hole 2412 in different directions, the line connecting the first sound receiving hole 2411 and the second sound receiving hole 2412 may also simultaneously satisfy the aforementioned two tilt relationships to enrich the direction of sound pickup and improve the sound pickup efficiency of the open-back hearing aid 200.

[0107] In some embodiments, the first sound receiving hole 2411 is located on the abutment portion 220 or on the ear hook 230 near the abutment portion 220. The line connecting the first sound receiving hole 2411 and the sound output hole 2111 passes through the wearer's auricle. This reduces the sound collected at the location of the first sound receiving hole 2411 from the sound output hole 2111, avoiding echoes and reducing the risk of howling. The ratio of the distance between the centroid of the second sound receiving hole 2412 and the centroid of the sound output hole 2111 to the distance between the centroid of the second sound receiving hole 2412 and the pressure relief hole 2112 is within a preset range. This allows the sound emitted by the sound output hole 2111 and the sound emitted by the pressure relief hole 2112 to effectively cancel each other out at the location of the second sound receiving hole 2412, reducing the sound collected at the location of the second sound receiving hole 2412 from the sound output hole 2111, avoiding echoes, and reducing the risk of howling. For further explanation of the foregoing, please refer to the relevant description above in this specification.

[0108] In some embodiments, when the wearer wears the open-back hearing aid 200, there is a third angle between the line connecting the first sound hole 2411 and the second sound hole 2412 and the wearer's sagittal axis.

[0109] For example, as shown in Figure 11, when the wearer wears the open-type hearing aid 200, there is a third angle γ between the line connecting the first sound hole 2411 and the second sound hole 2412 and the wearer's sagittal axis.

[0110] In some embodiments, the angle range of the third included angle is -35° to 35°. In some embodiments, the angle range of the third included angle is -25° to 25°. In some embodiments, the angle range of the third included angle is -15° to 15°.

[0111] In some embodiments of this specification, by limiting the third angle between the line connecting the first sound-receiving hole 2411 and the second sound-receiving hole 2412 and the sagittal axis, the open-type hearing aid 200 can better receive ambient sounds from in front of and behind the wearer, thereby improving its sound pickup efficiency.

[0112] In some embodiments, when the open-back hearing aid 200 includes a first microphone and a second microphone, the processor 250 can amplify the first electrical signal and the second electrical signal. The gain provided by the processor 250 for the first electrical signal and the second electrical signal includes the length of the acoustic path from the first microphone 2411 to the sound outlet 2111 and the length of the acoustic path from the second microphone 2412 to the sound outlet 2111. The first electrical signal is generated by the first microphone, and the second electrical signal is generated by the second microphone.

[0113] The first sound receiving hole 2411 and the second sound receiving hole 2412 can be located at various positions within the open-back hearing aid 200. For example, as shown in FIG11, the second sound receiving hole 2412 is located on the side of the wearer's auricle closer to the ear canal, and the first sound receiving hole 2411 is located on the side of the wearer's auricle farther from the ear canal. In this case, the length of the acoustic path from the second sound receiving hole 2412 to the sound output hole 2111 is less than the length of the acoustic path from the first sound receiving hole 2411 to the sound output hole 2111. For example, the first sound receiving hole 2411 and the second sound receiving hole 2412 can also be located at the positions described in any of the embodiments described above in this specification. As another example, the first sound receiving hole 2411 and the second sound receiving hole 2412 can also be located at positions other than those described in the embodiments described above in this specification.

[0114] Understandably, when the positions of the microphone holes are different, the proportion of sound generated by the sound-emitting part 210 in the sound collected by each microphone hole is different. For example, the line connecting the first microphone hole 2411 and the sound outlet hole 2111 of the first microphone can pass through the auricle. The ratio of the distance between the centroid of the second microphone hole 2412 and the sound outlet hole 2111 of the second microphone to the centroid of the first microphone hole 2411 and the pressure relief hole 2112 is within a preset range. Both the first and second microphones can reduce echo, but comparatively, the proportion of sound generated by the sound-emitting part 210 in the first electrical signal corresponding to the first microphone is less than the proportion of sound generated by the sound-emitting part 210 in the second electrical signal corresponding to the second microphone.

[0115] Based on this, when the processor 250 amplifies the first electrical signal and the second electrical signal, it can apply different multiples of amplification to the electrical signals generated by different microphone holes. The gain provided by the processor 250 to the first electrical signal and the second electrical signal can be related to the length of the acoustic path from the first microphone hole 2411 to the sound outlet 2111 and the length of the acoustic path from the second microphone hole 2412 to the sound outlet 2111. The shorter the acoustic path length from the microphone (e.g., the first microphone 2411, the second microphone 2412) to the output microphone 2111, the more sound it picks up from the output microphone 210. The processor 250 can provide different gains to the first and second electrical signals based on the difference between the lengths of the acoustic paths from the first microphone 2411 to the output microphone 2111 and from the second microphone 2412 to the output microphone 2111, ensuring that the sound components from the output microphone 210 in the amplified first electrical signal and the amplified second electrical signal are consistent. Since the difference in ambient sound between the first and second electrical signals is different from (e.g., much smaller than) the difference in sound generated by the output microphone 210, the processor 250 can perform differential processing on the sound components from the output microphone 210 in the amplified first and second electrical signals. The ambient sound in the first and second electrical signals can be preserved, thereby eliminating echoes and preventing howling.

[0116] For example, as shown in Figure 11, the second microphone 2412 is located on the side of the wearer's auricle closer to the ear canal, while the first microphone 2411 is located on the side of the wearer's auricle farther from the ear canal. In this case, the acoustic path length from the second microphone 2412 to the sound outlet 2111 is shorter than the acoustic path length from the first microphone 2411 to the sound outlet 2111. Therefore, the second microphone 2412 picks up more sound generated by the sound-emitting part 210 than the first microphone 2411 picks up more sound generated by the sound-emitting part 210. Consequently, the proportion of sound generated by the sound-emitting part 210 in the second electrical signal corresponding to the second microphone is greater than the proportion of sound generated by the sound-emitting part 210 in the first electrical signal corresponding to the first microphone. The gain provided by the processor 250 to the second electrical signal can be less than the gain provided to the first electrical signal, so that the sound components from the sound-emitting part 210 in the amplified first electrical signal and the sound components from the sound-emitting part 210 in the amplified second electrical signal remain consistent. Furthermore, the processor 250 can perform differential processing on the sound components from the sound-emitting part 210 in the amplified first electrical signal and the amplified second electrical signal to obtain the ambient sound in the first electrical signal and the second electrical signal. By placing the first microphone 2411 and the second microphone 2412 on different sides of the wearer's auricle, the difference between the sound generated by the sound-emitting part 210 picked up by the two microphones can be increased, thereby amplifying the first electrical signal and the second electrical signal by a greater factor of difference, so that a greater ambient sound can be obtained after differential processing of the amplified first electrical signal and the amplified second electrical signal.

[0117] The gain factor provided by the processor 250 for the first and second electrical signals can be determined in various ways. For example, the gain factor provided for the first and second electrical signals can be calculated and determined after measuring the open-fit hearing aid 200. The sound-emitting part 210 can play test audio, acquire the first and second electrical signals generated by the first and second microphones respectively, and analyze the proportion of ambient sound and sound generated by the sound-emitting part 210 in the first and second electrical signals to determine the gain factor provided by the first and second electrical signals. Alternatively, the lengths of the acoustic paths from the first receiver 2411 to the output port 2111 and from the second receiver 2412 to the output port 2111 can be measured. Based on the lengths of the acoustic paths from the first receiver 2411 to the output port 2111, the lengths of the acoustic paths from the second receiver 2412 to the output port 2111, and a preset correspondence rule between the length of the acoustic path and the gain, the gain factor provided by the first and second electrical signals can be determined.

[0118] In some embodiments, the processor 250 performs differential processing on the first gained electrical signal and the second gained electrical signal.

[0119] For illustrative purposes only, the first electrical signal is e+2n, and the second electrical signal is e+3n, where e is the ambient sound and n is the sound emitted by the sound-emitting part 210. The processor 250 can triple the gain of the first electrical signal, resulting in a first electrical signal of 3e+6n. The processor 250 can double the gain of the second electrical signal, resulting in a second electrical signal of 2e+6n. The processor 250 can perform differential processing on the first and second gained electrical signals to obtain a processed electrical signal e. The processor 250 can amplify this processed electrical signal e and then send it to the sound-emitting part 210.

[0120] Some embodiments in this specification can remove the sound from the sound-producing part 210 collected by each microphone by performing different gain processing on the electrical signals obtained by different microphones, thereby avoiding echo and reducing the risk of feedback.

[0121] In some embodiments, when the open-back hearing aid 200 includes a first microphone and a second microphone, the first microphone's corresponding first microphone aperture 2411 and the second microphone's corresponding second microphone aperture 2412 can both be offset from the first symmetry plane 300. More details about the first symmetry plane 300 can be found in the preceding description of this specification. For example, one of the first microphone aperture 2411 and the second microphone aperture 2412 can be located above the first symmetry plane 300 along its vertical axis, and the other can be located below the first symmetry plane 300 along its vertical axis, in order to better pick up ambient sounds from different directions and improve pickup efficiency.

[0122] In some embodiments, when the open-back hearing aid 200 includes a first microphone and a second microphone, at least one of the first microphone's corresponding first microphone aperture 2411 and the second microphone's corresponding second microphone aperture 2412 can be symmetrically arranged based on a first symmetry plane 300. For example, both the first microphone aperture 2411 and the second microphone aperture 2412 can be symmetrically arranged based on the first symmetry plane 300, which can divide both the first microphone aperture 2411 and the second microphone aperture 2412 into two symmetrical parts. As another example, one of the first microphone aperture 2411 and the second microphone aperture 2412 can be symmetrically arranged based on the first symmetry plane 300, while the other can be offset from the first symmetry plane 300.

[0123] Some embodiments in this specification, by incorporating two microphones on the open-back hearing aid 200, can enrich the directionality of sound pickup and improve the sound pickup efficiency of the open-back hearing aid 200. Furthermore, by adjusting the positions of the microphone holes corresponding to the two microphones, the amount of sound collected by the first microphone hole 2411 and the second microphone hole 2412 from the sound-emitting part 210 can be reduced, thereby lowering the risk of feedback.

[0124] In some embodiments, the open-back hearing aid 200 may also include a plurality of microphones 240. By setting a plurality of microphones 240, the directionality of sound pickup by the open-back hearing aid 200 can be adjusted, thereby improving the echo cancellation effect of the open-back hearing aid 200.

[0125] In some embodiments, the open-back hearing aid 200 may include a microphone array consisting of at least two microphones. As shown in FIG12, the open-back hearing aid 200 may include a microphone array consisting of eight microphones.

[0126] In some embodiments, the microphone array may be located on one or more components of the open-back hearing aid 200. For example, all microphones of the microphone array may be located on the abutment portion 220. As another example, some microphones of the microphone array may be located on the abutment portion 220, and other microphones may be located on the ear hook 230.

[0127] It is understood that, in some embodiments, the ratio of the distance between the centroid of the sound-receiving hole to the sound-exiting hole 2111 corresponding to one or more microphones in the microphone array to the distance between the centroid of the sound-receiving hole to the pressure relief hole 2112 is less than a preset ratio range. In some embodiments, the sound-receiving hole corresponding to one or more microphones in the microphone array is located on the abutment portion 220 or on the ear hook 230 in a region close to the abutment portion 220, and the line connecting the sound-receiving hole and the sound-exiting hole 2111 passes through the wearer's auricle.

[0128] In some embodiments, the microphones in the microphone array can be evenly arranged. As shown in Figure 12, the distance between each microphone and its adjacent microphones in the microphone array is the same. In some embodiments, the microphones in the microphone array can also be scattered. For example, the distance between each microphone and its adjacent microphones in the microphone array is different, and they are scattered in various positions in the open-back hearing aid 200.

[0129] In some embodiments, the processor 250 can adjust the directivity of the microphone array when collecting ambient sound, ensuring that the sound intensity from the direction of the sound outlet 2111 is always less than the sound intensity from other directions in the environment. For example, the processor 250 may have a preset method for controlling the amplitude and phase of the electrical signal generated by each microphone in the microphone array, thereby ensuring that the sound intensity from the direction of the sound outlet 2111 is always less than the sound intensity from other directions in the environment. As another example, after the wearer wears the open-back hearing aid 200, the position of the sound outlet 2111 in the pickup sound field formed by the microphone array can be analyzed and processed, and the microphone array can be adjusted (e.g., turning off or on some microphones) so that the sound outlet 2111 is located at or around the zero point in the pickup sound field formed by the adjusted microphone array. This ensures that the sound intensity from the direction of the sound outlet 2111 is always less than the sound intensity from other directions in the environment, avoiding echoes and reducing the risk of feedback. For example, the processor 250 can further analyze and process the direction of the sound source in the ambient sound and adjust the microphone array so that the sound source in the ambient sound is located at the pole or the area around the pole in the sound field formed by the adjusted microphone array, thereby ensuring that the sound intensity from the sound source in the ambient sound received by the microphone array is always greater than the sound intensity from other directions in the environment, thus improving the sound pickup efficiency.

[0130] For example, the processor 250 can analyze and process the direction of the sound outlet 2111 and adjust the microphone array to obtain two microphones 240 as shown in FIG. 13. The two microphones 240 can construct a directional sound field characterizing the directivity of the sound signals they receive. The aforementioned directional sound field can present a cardioid pattern as shown in FIG. 13, and the aforementioned two microphones 240 can be located on the axis of symmetry Q of the cardioid pattern 400, which can divide the cardioid pattern 400 into two symmetrical parts. In some embodiments, the poles of the cardioid pattern 400 can face the sound source 500 of the ambient sound, and the zeros of the cardioid pattern 400 can face the sound outlet 2111. The aforementioned poles can refer to the convex points on the cardioid pattern 400 that are opposite to the concave points along the axis of symmetry Q. The poles correspond to the direction in which the microphone has the highest sensitivity to sound signals. The zeros can refer to the concave points on the cardioid pattern 400. The zeros correspond to the direction in which the microphone has the lowest (or zero) sensitivity to sound signals.

[0131] The aforementioned settings ensure that the sound intensity from the direction of the sound outlet 2111 in the ambient sound received by the microphone array is always less than the sound intensity from other directions in the environment, thereby reducing echo and preventing feedback.

[0132] In some embodiments, the processor 250 may collect ambient sound based solely on a target microphone in the microphone array. The target microphone may refer to a microphone that collects ambient sound for playback by the sound-emitting unit 210. The aforementioned target microphone may be some or all of the microphones in the microphone array. When the target microphone may be some of the microphones in the microphone array, the processor 250 may select the target microphone in the microphone array in various ways. For example, the processor 250 may acquire the electrical signals generated by the ambient sound collected by all microphones in the microphone array, select one or more microphones as target microphones, and amplify the electrical signals corresponding to the target microphones. As another example, the processor 250 may select one or more microphones in the microphone array as target microphones, control the remaining microphones in the microphone array to turn off, control the target microphone to turn on, and acquire and amplify the electrical signals generated by the target microphones collecting ambient sound.

[0133] The target microphone in the microphone array can vary depending on the acquisition requirements and the usage environment. The processor 250 can determine the target microphone in the microphone array in various ways.

[0134] In some embodiments, the processor 250 filters target microphones in the microphone array and collects ambient sound through the target microphones to generate corresponding electrical signals. For example, when it is necessary to improve the sound pickup efficiency of the open-back hearing aid 200, the processor 250 can determine the direction of the ambient sound source that the open-back hearing aid 200 needs to collect and filter out microphones in the microphone array that are easy to construct facing the direction of the sound source as target microphones. More details on determining the direction of the sound source can be found in the relevant description below this specification. As another example, when it is necessary to reduce the echo in the open-back hearing aid 200 and avoid the occurrence of feedback, the processor 250 can determine the position of the sound outlet 2111 and filter out one or more target microphones in the microphone array. The sound intensity from the direction of the sound outlet 2111 in the ambient sound received by the aforementioned one or more target microphones is always less than the sound intensity from other directions in the environment.

[0135] Some embodiments of this specification use processor 250 to filter target microphones in the microphone array and collect ambient sound through the target microphones to generate corresponding electrical signals. The target microphones in the microphone array can be adjusted according to different needs to improve the sound pickup efficiency and / or echo cancellation effect of the open-fit hearing aid 200, thereby enhancing the flexibility of the open-fit hearing aid 200.

[0136] In some embodiments, different usage scenarios have different requirements for the pickup direction of the microphone array, or the directional pickup of the open-back hearing aid 200. Based on this, the processor 250 can also identify the electrical signals generated by the microphone array to determine the current usage scenario of the open-back hearing aid 200. Based on the current usage scenario of the open-back hearing aid 200, the processor 250 determines the target microphone in the microphone array. Specifically, the processor 250 can first acquire the electrical signals already generated by the microphone array, and can perform modeling or use various data analysis algorithms, such as regression analysis and discriminant analysis, to identify the environmental sound field characteristics of the aforementioned electrical signals and determine the current usage scenario of the open-back hearing aid 200. Based on the current usage scenario of the open-back hearing aid 200, the processor 250 can determine the current directional requirements of the open-back hearing aid 200 according to a preset correspondence rule between usage scenarios and directional requirements, thereby determining the target microphone in the microphone array.

[0137] For example, the processor 250 can identify environmental sound field characteristics such as continuously changing vehicle sounds, human voice conversations, and noisy and variable environmental noise in the electrical signal, thereby determining that the current usage scenario of the open-back hearing aid 200 is a street scene, and according to the preset correspondence rules between usage scenarios and directional requirements, determine that the current directional requirement of the open-back hearing aid 200 is omnidirectional recognition, so as to identify sounds from different directions on the street. Correspondingly, all microphones in the microphone array can be identified as target microphones.

[0138] For example, the processor 250 can identify environmental sound field characteristics such as the presence of a single human voice dialogue in the electrical signal and low ambient noise, thereby determining that the current usage scenario of the open-back hearing aid 200 is a meeting scenario. Based on the preset correspondence rules between usage scenarios and directional requirements, the processor 250 determines that the current directional requirement of the open-back hearing aid 200 is to point towards the wearer along the sagittal axis in order to better receive the sound from the participants. Correspondingly, the microphones in the microphone array whose connection points towards the wearer along the sagittal axis can be identified as target microphones.

[0139] Some embodiments in this specification determine the target microphone in the microphone array based on the current usage scenario of the open-fit hearing aid 200, which enables the open-fit hearing aid 200 to meet the directional requirements in different usage scenarios and improve the user experience.

[0140] In some embodiments, the processor 250 can also acquire motion data of the wearer obtained by an accelerometer, wherein the aforementioned accelerometer can be disposed on the abutment portion 220; when the motion data meets preset motion conditions, the processor 250 determines the target microphone in the microphone array. Motion data meeting preset motion conditions indicates that the wearer is in motion. Motion data may include the wearer's gait data, movement speed, movement direction, etc. Preset motion conditions can characterize the conditions under which the wearer is in motion. For example, preset motion conditions may include a movement speed in the motion data exceeding a preset speed threshold. Another example is that preset motion conditions may include a step frequency in the gait data exceeding a preset step frequency threshold. When the motion data meets the preset motion conditions, the processor 250 can determine that the wearer is in motion. When the wearer is in motion, the processor 250 can determine the current directional requirements of the open-back hearing aid, thereby determining the target microphone in the microphone array. For example, when the wearer is in motion, the processor 250 can determine that the current directional requirement of the open-back hearing aid 200 is omnidirectional recognition, in order to identify sounds from different directions and avoid potential dangers. Correspondingly, the processor can identify all microphones in the microphone array as target microphones. When the wearer is in motion, the processor 250 can also determine the current directional requirement of the open-back hearing aid 200 based on the direction of movement, thereby identifying the target microphones in the microphone array. For example, when the wearer is in motion, the processor 250 can primarily identify sounds from the direction of movement to avoid dangers while moving in that direction. Correspondingly, the processor can identify microphones in the microphone array whose connecting lines point towards the direction of movement as target microphones.

[0141] Some embodiments of this specification can determine the target microphone in the microphone array using the wearer's motion data, thereby automatically selecting the target microphone in the microphone array when the wearer is moving, thereby adjusting the directivity of the open-type hearing aid 200 and reducing the wearer's motion risks.

[0142] In some embodiments, when the open-back hearing aid 200 includes multiple microphones, the sound pickup holes corresponding to the multiple microphones can be offset from the first symmetry plane 300 to enrich the pickup direction of the open-back hearing aid 200 and facilitate effective pickup of ambient sounds from different directions. More information about the first symmetry plane 300 can be found in the relevant description above in this specification.

[0143] In some embodiments, when the open-back hearing aid 200 includes multiple microphones, the microphone apertures corresponding to the multiple microphones can be at least partially symmetrically arranged based on the first symmetry plane 300. For example, the microphone apertures corresponding to the multiple microphones are all symmetrically arranged based on the first symmetry plane 300. Another example is that the microphone apertures corresponding to some microphones are symmetrically arranged based on the first symmetry plane 300.

[0144] In some embodiments of this specification, by incorporating multiple microphones in the open-back hearing aid 200, the directionality of sound pickup by the open-back hearing aid 200 can be enhanced, thereby improving the pickup efficiency of the open-back hearing aid 200. Furthermore, the processor 250 can also filter the microphones in the microphone array, increasing the flexibility of the open-back hearing aid 200. The processor can adjust the target microphones in the microphone array as needed to improve the pickup efficiency and / or enhance the echo cancellation effect of the open-back hearing aid 200.

[0145] The open-fit hearing aid 200 is a unilateral hearing aid, and the wearer can wear the open-fit hearing aid 200 on the corresponding ear.

[0146] The open-fit hearing aid 200 can also be a bilateral hearing aid, which includes an open-fit hearing aid located in the left ear and an open-fit hearing aid located in the right ear.

[0147] In some embodiments, when the open-fit hearing aid 200 is a bilateral hearing aid, the microphones in the open-fit hearing aid 200 may include a first set of microphones located near the wearer's left ear and a second set of microphones located in the wearer's right ear. The aforementioned first set of microphones and second set of microphones can collect ambient sounds from different locations, and the first set of microphones and second set of microphones may be configured with reference to any of the embodiments described above in this specification.

[0148] In some embodiments, the first group of microphones may include one or more microphones, and the second group of microphones may include one or more microphones. The number of microphones in the first group may be the same or different. For example, the first group of microphones may include one microphone disposed on the abutment portion 220, and the second group of microphones may include two microphones disposed on the abutment portion 220.

[0149] In some embodiments, when the wearer wears the open-back hearing aid 200, the first and second sets of microphones can jointly construct a directional sound field pointing in a specific direction in space. For example, the first and second sets of microphones can jointly construct a directional sound field with its null point pointing towards the sound outlet 2111, thereby ensuring that the sound intensity from the sound outlet 2111 direction in the ambient sound received by the first and second sets of microphones is always less than the sound intensity from other directions in the environment, thus reducing echo and minimizing the risk of feedback. As another example, the first and second sets of microphones can jointly construct a directional sound field with its pole pointing towards the sound source direction in the ambient sound, thereby ensuring that the sound intensity from the sound source in the ambient sound received by the first and second sets of microphones is always greater than the sound intensity from other directions in the environment, improving sound pickup efficiency.

[0150] In some embodiments, when the open-fit hearing aid 200 is a bilateral hearing aid, the sound-producing part 210 of the open-fit hearing aid 200 may include a first sound-producing part located in the wearer's left ear and a second sound-producing part located in the wearer's right ear. The first sound-producing part and the second sound-producing part can generate sound under the action of electrical signals to assist the wearer's different ears in hearing.

[0151] In some embodiments, the processor 250 can send the same electrical signal to the first sound-emitting part and the second sound-emitting part respectively, and the first sound-emitting part and the second sound-emitting part can generate sound under the action of the same electrical signal.

[0152] In some embodiments, the processor 250 may further determine the direction of the ambient sound source; based on the direction of the sound source, adjust the phase of the electrical signals generated by one or more microphones to obtain a first sound signal and a second sound signal, wherein there is a phase difference between the first sound signal and the second sound signal; send the first sound signal and the second sound signal to a first sound-emitting part and a second sound-emitting part, respectively, wherein the first sound-emitting part produces sound under the action of the first sound signal, and the second sound-emitting part produces sound under the action of the second sound signal. The first sound signal is an electrical signal that drives the first sound-emitting part to produce sound, and the second sound signal is an electrical signal that drives the second sound-emitting part to produce sound.

[0153] The processor 250 can determine the direction of the ambient sound source based on various methods. Among these methods, the direction of the ambient sound source can be the direction of the ambient sound source relative to the wearer. Furthermore, the direction of the ambient sound source can be that the ambient sound source is located to the left or right of the wearer.

[0154] In some embodiments, when one or more microphones comprise a microphone array consisting of at least two microphones, the processor 250 can filter the electrical signals generated by each microphone in the microphone array to identify a target electrical signal, wherein the target electrical signal is the electrical signal with the highest sound pressure level of the ambient sound among the electrical signals generated by each microphone. Since the closer the microphone is to the direction of the sound source, the higher the sound pressure level of the ambient sound in the electrical signal acquired by the microphone, the processor 250 can identify the microphone corresponding to the target electrical signal as the first sound source microphone, which is the microphone in the microphone array that is closer to the sound source of the ambient sound. The processor 250 can determine the direction of the ambient sound source based on the position of the first sound source microphone in the microphone array. For example, if the first sound source microphone is located on the left side of the microphone array, the processor 250 can determine that the direction of the ambient sound source is to the left of the wearer.

[0155] In some embodiments, when one or more microphones include a first group of microphones located on the wearer's left ear and a second group of microphones located on the wearer's right ear, the processor 250 can filter the first group of electrical signals and the second group of electrical signals to include electrical signals with stronger ambient sound. The first group of electrical signals is the electrical signal generated by the first group of microphones collecting ambient sound, and the second group of electrical signals is the electrical signal generated by the second group of microphones collecting the ambient sound. As mentioned above, the closer the microphone is to the direction of the sound source, the higher the sound pressure level of the ambient sound in the electrical signal collected by the microphone. Therefore, the processor 250 can identify the microphone corresponding to the aforementioned filtered electrical signal as the second sound source microphone. The second sound source microphone is the first group of microphones and the group of microphones in the second group that is closer to the sound source of the ambient sound. The processor 250 can determine the direction of the ambient sound source based on the position of the second sound source microphone relative to the wearer. For example, if the second sound source microphone is the second group of microphones, and the second group of microphones is located on the wearer's right ear, the processor 250 can determine that the direction of the ambient sound source is on the wearer's right side.

[0156] After determining the direction of the ambient sound source, the processor 250 can adjust the phase of the electrical signals generated by one or more microphones according to the direction of the sound source and according to a preset adjustment rule (for example, delaying the initial phase of the electrical signal corresponding to the sound-emitting part away from the direction of the sound source by a preset time), so that there is a phase difference between the first sound signal and the second sound signal, thereby causing the sound-emitting part closer to the direction of the ambient sound source to emit sound first, and the sound-emitting part away from the direction of the ambient sound source to emit sound later.

[0157] For example, processor 250 can determine that the direction of the ambient sound source is to the wearer's left, thereby adjusting the phase of the electrical signals generated by one or more microphones so that the initial phase of the second sound signal lags behind the first sound signal in the time domain. Processor 250 sends the first sound signal and the second sound signal to the first sound-emitting part and the second sound-emitting part, respectively. The first sound-emitting part produces sound first under the action of the first sound signal, and the second sound-emitting part produces sound later under the action of the second sound signal.

[0158] Understandably, in normal hearing, a listener can discern the direction of a sound source based on the time difference between the two ears hearing the sound. Based on this, some embodiments in this specification can simulate the hearing time difference caused by the different distances between the directions of the sound source in both ears during normal hearing. Correspondingly, the wearer can also discern the direction of the ambient sound source based on the time difference between the first and second sound-producing parts, thereby effectively improving the wearer's environmental perception and spatial interaction experience. Simultaneously, it can also enhance the safety of using the open-fit hearing aid 200. For example, when ambient sounds include vehicle sounds, the wearer can discern the direction of the vehicle sounds and thus avoid the vehicle.

[0159] Some embodiments described below in this specification will exemplify a microphone setup.

[0160] In one embodiment, the abutment portion 220 can be a cylindrical structure, and the ear hook 230 is connected to the side of the abutment portion 220. For example, the abutment portion 220 can be a cylindrical or near-cylindrical structure (e.g., slightly tapered; or, for example, with an arc connection between the side and the end face). In this embodiment, one or more microphones 240 can be disposed on the end face of the abutment portion 220 along the axial direction of the abutment portion 220. For each microphone 240, the distance between the microphone 240's microphone hole 241 and the centroid of the end face on which the microphone 240 is disposed is less than 7 mm. For example, the distance between the microphone 240's microphone hole 241 and the centroid of the end face on which the microphone 240 is disposed can be 3 mm. As another example, the distance between the microphone 240's microphone hole 241 and the centroid of the end face on which the microphone 240 is disposed can be 0, that is, the microphone 240's microphone hole 241 is located at the centroid of the end face on which the microphone 240 is disposed. The aforementioned microphone 240 can also satisfy the microphone settings described in one or more embodiments of this specification.

[0161] As an example only, a microphone 240 is provided on each of the two end faces of the abutment portion 220 along its axial direction, and the sound receiving hole 241 of each microphone 240 is located at the centroid of the end face on which the microphone 240 is provided.

[0162] The microphone arrangement described in the foregoing embodiments of this specification allows the microphone 240 to be positioned on the abutment portion 220. When the wearer moves, the auricle can shield the microphone 240, reducing wind noise. Simultaneously, positioning the microphone 240's receiving port 241 on the axial end face of the abutment portion 220 facilitates the production and installation of the open-back hearing aid 200. Furthermore, the relatively flat axial end face of the cylindrical structure makes it easier to waterproof the microphone 240's receiving port 241. In addition, sound field disturbances can occur in areas close to the human body surface. By limiting the distance between the centroid of the microphone 240's receiving port 241 and the axial end face of the abutment portion 220, the microphone 240's receiving port 241 can be kept away from the human body surface, ensuring the microphone 240 receives a stable sound field and improving sound pickup quality.

[0163] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this specification. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this specification. Such modifications, improvements, and corrections are suggested in this specification and therefore remain within the spirit and scope of the exemplary embodiments described herein.

[0164] Furthermore, this specification uses specific terms to describe embodiments thereof. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of this specification. Therefore, it should be emphasized and noted that references to "an embodiment," "one embodiment," or "an alternative embodiment" in different locations throughout this specification do not necessarily refer to the same embodiment. Moreover, certain features, structures, or characteristics in one or more embodiments of this specification can be appropriately combined.

[0165] Furthermore, unless expressly stated in the claims, the order of processing elements and sequences, the use of numbers and letters, or other names described in this specification are not intended to limit the order of the processes and methods described herein. Although various examples have been discussed in the foregoing disclosure of some embodiments of the invention that are currently considered useful, it should be understood that such details are for illustrative purposes only, and the appended claims are not limited to the disclosed embodiments; rather, the claims are intended to cover all modifications and equivalent combinations that conform to the spirit and scope of the embodiments described herein. For example, while the system components described above can be implemented using hardware devices, they can also be implemented solely using software solutions, such as installing the described system on existing servers or mobile devices.

[0166] Similarly, it should be noted that, in order to simplify the description disclosed herein and thus aid in the understanding of one or more embodiments of the invention, the foregoing description of embodiments in this specification may sometimes combine multiple features into a single embodiment, drawing, or description thereof. However, this method of disclosure does not imply that the subject matter of this specification requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of a single embodiment disclosed above.

[0167] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit reservation. Although the numerical ranges and parameters used to confirm their breadth of range in some embodiments of this specification are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0168] For each patent, patent application, patent application publication, and other material, such as articles, books, specifications, publications, and documents, referenced in this specification, the entire contents of which are incorporated herein by reference. This excludes historical application documents that are inconsistent with or conflict with the content of this specification, as well as documents that limit the broadest scope of the claims in this specification (currently or subsequently appended to this specification). It should be noted that in the event of any inconsistency or conflict between the descriptions, definitions, and / or terminology used in the supplementary materials to this specification and the content of this specification, the descriptions, definitions, and / or terminology used in this specification shall prevail.

[0169] Finally, it should be understood that the embodiments described in this specification are merely illustrative of the principles of the embodiments described herein. Other variations may also fall within the scope of this specification. Therefore, alternative configurations of the embodiments described herein are intended to be illustrative rather than limiting, and should be considered consistent with the teachings of this specification. Accordingly, the embodiments described herein are not limited to those explicitly introduced and described herein.

Claims

1. An open-back hearing aid, characterized in that, The open-fit hearing aid is located entirely below the wearer's triangular fossa, and includes: A sound-emitting part, configured to be located in the concha of the wearer but not blocking the ear canal opening, the sound-emitting part comprising: The housing and the diaphragm disposed within the housing, wherein a front cavity and a rear cavity are respectively provided on both sides of the diaphragm within the housing, the front cavity is acoustically coupled to a sound outlet provided on the housing, and the rear cavity is acoustically coupled to a pressure relief hole provided on the housing; The abutting portion is configured to abut against the back of the wearer's ear; The ear hook is configured to bypass the wearer's antihelix and helix, connecting the sound-producing part and the abutment part; One or more microphones are configured to collect ambient sound to generate corresponding electrical signals; and The processor is configured to amplify the electrical signals generated by the one or more microphones and send the processed electrical signals to the sound-emitting part, which generates sound under the action of the electrical signals.

2. The open-back hearing aid according to claim 1, characterized in that, The one or more microphones include a first microphone, which is acoustically connected to a first sound-receiving port. The ratio of the distance between the centroid of the first sound-receiving hole and the centroid of the sound-emitting hole to the distance between the centroid of the first sound-receiving hole and the pressure relief hole is within a preset ratio range.

3. The open-type hearing aid according to claim 2, characterized in that, The preset ratio range is 0.8 to 1.

75.

4. The open-type hearing aid according to claim 3, characterized in that, The preset ratio range is 0.9 to 1.

5.

5. The open-type hearing aid according to claim 1 or 2, characterized in that, The one or more microphones include a first microphone, which is acoustically connected to a first sound-receiving port. The first sound receiving hole is located at the abutment portion or at the ear hook, and the line connecting the first sound receiving hole and the sound output hole passes through the wearer's auricle.

6. The open-back hearing aid according to claim 5, characterized in that, The one or more microphones further include a second microphone, which is acoustically connected to the second sound-receiving port. The second sound receiving hole is located at the abutment portion or at the area near the abutment portion on the ear hook, and the line connecting the second sound receiving hole and the sound output hole passes through the wearer's auricle.

7. The open-type hearing aid according to claim 6, characterized in that, When the wearer wears the open-back hearing aid, the angle between the line connecting the first and second sound holes and the horizontal plane ranges from -40° to 40°.

8. The open-type hearing aid according to claim 6, characterized in that, When the wearer wears the open-back hearing aid, the angle between the line connecting the first and second sound holes and the wearer's coronal axis ranges from -30° to 30°.

9. The open-type hearing aid according to claim 5, characterized in that, The one or more microphones further include a second microphone, which is acoustically connected to the second sound-receiving port. The ratio of the distance between the centroid of the second sound receiving hole and the centroid of the sound output hole to the distance between the centroid of the second sound receiving hole and the pressure relief hole is within a preset ratio range.

10. The open-back hearing aid according to claim 9, characterized in that, When the wearer wears the open-back hearing aid, the angle between the line connecting the first and second sound holes and the wearer's sagittal axis is in the range of -35° to 35°.

11. The open-type hearing aid according to claim 1, characterized in that, The one or more microphones include a first microphone and a second microphone, and the processor is further configured to: Gain is applied to the first electrical signal and the second electrical signal, wherein the first electrical signal is the electrical signal generated by the first microphone, and the gain provided by the processor for the first electrical signal and the second electrical signal is related to the length of the acoustic path from the first sound hole to the sound outlet and the length of the acoustic path from the second sound hole to the sound outlet, wherein the first microphone is acoustically connected to the first sound hole, and the second microphone is acoustically connected to the second sound hole; Differential processing is performed on the first and second electrical signals after gain.

12. The open-type hearing aid according to claim 11, characterized in that, The second sound-gathering hole is located on the side of the wearer's auricle closer to the ear canal, and the first sound-gathering hole is located on the side of the wearer's auricle away from the ear canal. The length of the acoustic path from the second microphone hole to the sound outlet hole is less than the length of the acoustic path from the first microphone hole to the sound outlet hole, and the gain provided by the processor for the second electrical signal is less than the gain provided for the first electrical signal.

13. The open-type hearing aid according to claim 1, characterized in that, The one or more microphones include a microphone array consisting of at least two microphones. The processor is also configured to: The directivity of the microphone array when collecting ambient sound is adjusted so that the sound intensity from the direction of the sound outlet is always less than the sound intensity from other directions in the environment.

14. The open-type hearing aid according to claim 1, characterized in that, The one or more microphones include a microphone array consisting of at least two microphones. The processor is also configured to: Select a target microphone from the microphone array and collect ambient sound through the target microphone to generate a corresponding electrical signal.

15. The open-type hearing aid according to claim 1, characterized in that, The one or more microphones include a microphone array consisting of at least two microphones. The processor is also configured to: Identify the electrical signals generated by the microphone array to determine the current usage scenario of the open-back hearing aid; Based on the current usage scenario of the open-back hearing aid, the target microphone in the microphone array is determined.

16. The open-back hearing aid according to claim 1, characterized in that, The one or more microphones include a microphone array consisting of at least two microphones, and the abutment includes an accelerometer configured to acquire motion data of the wearer; The processor is also configured to: When the motion data meets the preset motion conditions, the target microphone in the microphone array is determined, wherein the motion data meeting the preset motion conditions indicates that the wearer is in motion.

17. The open-type hearing aid according to claim 1, characterized in that, The one or more microphones include a first set of microphones located near the wearer's left ear and a second set of microphones located near the wearer's right ear. When the wearer wears the open-back hearing aid, the first set of microphones and the second set of microphones together construct a directional sound field pointing in a specific direction in space.

18. The open-back hearing aid according to claim 1, characterized in that, The ear hook has a first plane of symmetry, and the one or more microphones include a first microphone, with a first sound-receiving hole acoustically connected to the first microphone offset from the first plane of symmetry.

19. The open-back hearing aid according to claim 1, characterized in that, The ear hook has a first symmetry plane, and the one or more microphones include a first microphone and a second microphone. The first sound-receiving hole acoustically connected to the first microphone and the second sound-receiving hole acoustically connected to the second microphone are both offset from the first symmetry plane.

20. The open-back hearing aid according to claim 1, characterized in that, The distance between the centroids of the sound-receiving holes and the sound-emitting holes of the one or more microphones is within 6 to 20 mm.

21. The open-back hearing aid according to claim 1, characterized in that, The abutment part has a cylindrical structure, and the ear loop is connected to the side of the abutment part. The one or more microphones are disposed on the end face of the cylindrical structure along the axial direction of the cylindrical structure. For each microphone, the distance between the microphone's sound hole and the centroid of the end face on which the microphone is disposed is less than 7 mm.

22. The open-type hearing aid according to claim 1, characterized in that, The sound-producing part includes a first sound-producing part located in the wearer's left ear and a second sound-producing part located in the wearer's right ear. The processor is further configured to: Determine the direction of the sound source of the ambient sound; Based on the direction of the sound source, the phase of the electrical signals generated by the one or more microphones is adjusted to obtain a first sound signal and a second sound signal, wherein there is a phase difference between the first sound signal and the second sound signal; The first sound signal and the second sound signal are respectively sent to the first sound-emitting part and the second sound-emitting part. The first sound-emitting part generates sound under the action of the first sound signal, and the second sound-emitting part generates sound under the action of the second sound signal.

23. The open-type hearing aid according to claim 22, characterized in that, The one or more microphones include a microphone array consisting of at least two microphones. The processor is further configured to: Filter the target electrical signal among the electrical signals generated by each microphone in the microphone array, wherein the target electrical signal is the electrical signal with the highest sound pressure level of the ambient sound among the electrical signals generated by each microphone; The microphone corresponding to the target electrical signal is identified as the first sound source microphone; Based on the position of the first sound source microphone in the microphone array, the direction of the ambient sound source is determined.

24. The open-type hearing aid according to claim 22, characterized in that, The one or more microphones include a first set of microphones located in the wearer's left ear and a second set of microphones located in the wearer's right ear. The processor is further configured to: The first group of electrical signals and the second group of electrical signals are selected based on the sound pressure level of the ambient sound. The first group of electrical signals is generated by the first group of microphones collecting the ambient sound, and the second group of electrical signals is generated by the second group of microphones collecting the ambient sound. The microphone corresponding to the selected electrical signal is identified as the second sound source microphone; Based on the position of the second sound source microphone relative to the wearer, the direction of the ambient sound source is determined.

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