A method and system for detecting the status of a bone conduction hearing device

Abstract

The embodiment of the application discloses a method and system for detecting the state of a bone conduction hearing device, the bone conduction hearing device at least comprising a microphone, a speaker, a feedback analysis unit and a signal processing unit, the method comprising: generating a third sound by the speaker based on a first signal; wherein the first signal is generated by the signal processing unit; receiving the third sound by the microphone and generating a feedback signal; determining, by the feedback analysis unit, the feedback path transfer function from the speaker to the microphone of the bone conduction hearing device based on the feedback signal of the microphone and the first signal; obtaining at least one preset feedback path transfer function; comparing the feedback path transfer function with the at least one preset feedback path transfer function; and determining, by the signal processing unit, the state of the bone conduction hearing device according to the comparison result.

Description

Technical Field

[0001] This application relates to the field of hearing equipment technology, and in particular to a method and system for detecting the status of bone conduction hearing devices. Background Technology

[0002] Hearing devices (e.g., hearing aids) typically incorporate both a microphone and a speaker, and their condition significantly impacts their usability. Abnormalities in the condition of a hearing device can lead to a substantial decrease in its output sensitivity or even malfunction (e.g., feedback). Therefore, monitoring the condition of hearing devices is crucial for ensuring their proper functioning and minimizing potential damage from malfunctions. In bone conduction hearing devices (e.g., bone conduction hearing aids), the feedback path transfer function is a key indicator of the device's condition. In certain scenarios, detecting and evaluating the feedback path transfer function of a bone conduction hearing device can provide a direct visual representation of its real-time status. Summary of the Invention

[0003] One embodiment of this application also provides a method for detecting the state of a bone conduction hearing device, wherein the bone conduction hearing device includes at least a microphone, a speaker, a feedback analysis unit, and a signal processing unit. The method includes: the speaker generating a third sound based on a first signal; wherein the first signal is generated by the signal processing unit; the microphone receiving the third sound and generating a feedback signal; the feedback analysis unit determining a feedback path transfer function from the speaker to the microphone of the bone conduction hearing device based on the feedback signal from the microphone and the first signal; obtaining at least one preset feedback path transfer function; comparing the feedback path transfer function and the at least one preset feedback path transfer function; and the signal processing unit determining the state of the bone conduction hearing device based on the comparison result.

[0004] In some embodiments, the at least one preset feedback path transfer function includes a standard feedback path transfer function and an abnormal feedback path transfer function; the abnormal feedback path transfer function includes one or more of the following: incorrect wearing feedback path transfer function, bone conduction hearing device structural abnormality feedback path transfer function, foreign object intrusion feedback path transfer function, and foreign object obstruction feedback path transfer function; comparing the feedback path transfer function and the at least one preset feedback path transfer function includes: determining the at least one preset feedback path transfer function that is within a preset threshold range of the feedback path transfer function; and determining the type of the feedback path transfer function based on the type of the at least one preset feedback path transfer function.

[0005] In some embodiments, determining the type of the feedback path transfer function based on the type of the at least one preset feedback path transfer function includes: if the type of the at least one preset feedback path transfer function is a standard feedback path transfer function, then the type of the feedback path transfer function is determined to be normal; or if the type of the at least one preset feedback path transfer function is an abnormal feedback path transfer function, then the abnormal type of the feedback path transfer function is determined; further including: if the type of the at least one preset feedback path transfer function is an incorrect wearing feedback path transfer function, then the type of the feedback path transfer function is determined to be incorrect wearing; or if the type of the at least one preset feedback path transfer function is a bone conduction hearing device structural abnormality feedback path transfer function, then the type of the feedback path transfer function is determined to be bone conduction hearing device structural abnormality; or if the type of the at least one preset feedback path transfer function is a foreign body intrusion feedback path transfer function, then the type of the feedback path transfer function is determined to be foreign body intrusion; or if the type of the at least one preset feedback path transfer function is a foreign body obstruction feedback path transfer function, then the type of the feedback path transfer function is determined to be foreign body obstruction.

[0006] In some embodiments, determining the at least one preset feedback path transfer function that is within a preset threshold range from the feedback path transfer function includes: if the at least one preset feedback path transfer function includes at least two, then determining the preset feedback path transfer function with the smallest difference as the preset feedback path transfer function.

[0007] In some embodiments, determining the state of the bone conduction hearing device based on the comparison result includes: if the type of the feedback path transfer function is normal, then the state of the bone conduction hearing device is determined to be normal; or if the type of the feedback path transfer function is abnormal, then the state of the bone conduction hearing device is determined to be abnormal; further including determining the abnormal type of the bone conduction hearing device: if the type of the feedback path transfer function is incorrect wearing, then the state of the bone conduction hearing device is determined to be incorrect wearing; or if the type of the feedback path transfer function is structural abnormality of the bone conduction hearing device, then the state of the bone conduction hearing device is determined to be structural abnormality; or if the type of the feedback path transfer function is foreign body intrusion, then the state of the bone conduction hearing device is determined to be foreign body intrusion; or if the type of the feedback path transfer function is foreign body obstruction, then the state of the bone conduction hearing device is determined to be foreign body obstruction.

[0008] In some embodiments, the method further includes: adaptively adjusting the parameters of the bone conduction hearing device or sending a reminder message to the user based on the status of the bone conduction hearing device.

[0009] In some embodiments, the state of the bone conduction hearing device includes at least one of the following: normal state and abnormal state; the abnormal state includes one or more of the following: incorrect wearing, abnormal structure of the bone conduction hearing device, foreign object intrusion, and foreign object obstruction.

[0010] One embodiment of this application also provides a system for detecting the state of a bone conduction hearing device, wherein the bone conduction hearing device includes at least a microphone, a speaker, a feedback analysis unit, and a signal processing unit. The system includes: the speaker being configured to generate a third sound based on a first signal; wherein the first signal is generated by the signal processing unit; the microphone being configured to receive the third sound and generate a feedback signal; the feedback analysis unit being configured to determine a feedback path transfer function from the speaker to the microphone of the bone conduction hearing device based on the feedback signal from the microphone and the first signal; acquiring at least one preset feedback path transfer function; comparing the feedback path transfer function and the at least one preset feedback path transfer function; and the signal processing unit being configured to determine the state of the bone conduction hearing device based on the comparison result.

[0011] In some embodiments, the at least one preset feedback path transfer function includes a standard feedback path transfer function and an abnormal feedback path transfer function; the abnormal feedback path transfer function includes one or more of the following: incorrect wearing feedback path transfer function, bone conduction hearing device structural abnormality feedback path transfer function, foreign object intrusion feedback path transfer function, and foreign object obstruction feedback path transfer function; comparing the feedback path transfer function and the at least one preset feedback path transfer function includes: determining the at least one preset feedback path transfer function that is within a preset threshold range of the feedback path transfer function; and determining the type of the feedback path transfer function based on the type of the at least one preset feedback path transfer function.

[0012] In some embodiments, determining the type of the feedback path transfer function based on the type of the at least one preset feedback path transfer function includes: if the type of the at least one preset feedback path transfer function is a standard feedback path transfer function, then the type of the feedback path transfer function is determined to be normal; or if the type of the at least one preset feedback path transfer function is an abnormal feedback path transfer function, then the abnormal type of the feedback path transfer function is determined; further including: if the type of the at least one preset feedback path transfer function is an incorrect wearing feedback path transfer function, then the type of the feedback path transfer function is determined to be incorrect wearing; or if the type of the at least one preset feedback path transfer function is a bone conduction hearing device structural abnormality feedback path transfer function, then the type of the feedback path transfer function is determined to be bone conduction hearing device structural abnormality; or if the type of the at least one preset feedback path transfer function is a foreign body intrusion feedback path transfer function, then the type of the feedback path transfer function is determined to be foreign body intrusion; or if the type of the at least one preset feedback path transfer function is a foreign body obstruction feedback path transfer function, then the type of the feedback path transfer function is determined to be foreign body obstruction.

[0013] In some embodiments, determining the at least one preset feedback path transfer function within a preset threshold range includes: if the at least one preset feedback path transfer function includes at least two, then determining the preset feedback path transfer function with the smallest difference as the preset feedback path transfer function.

[0014] In some embodiments, determining the state of the bone conduction hearing device based on the comparison result includes: if the type of the feedback path transfer function is normal, then the state of the bone conduction hearing device is determined to be normal; or if the type of the feedback path transfer function is abnormal, then the state of the bone conduction hearing device is determined to be abnormal; further including determining the abnormal type of the bone conduction hearing device: if the type of the feedback path transfer function is incorrect wearing, then the state of the bone conduction hearing device is determined to be incorrect wearing; or if the type of the feedback path transfer function is structural abnormality of the bone conduction hearing device, then the state of the bone conduction hearing device is determined to be structural abnormality; or if the type of the feedback path transfer function is foreign body intrusion, then the state of the bone conduction hearing device is determined to be foreign body intrusion; or if the type of the feedback path transfer function is foreign body obstruction, then the state of the bone conduction hearing device is determined to be foreign body obstruction.

[0015] In some embodiments, the signal processing unit is configured to: adaptively adjust the parameters of the bone conduction hearing device or send reminder information to the user based on the state of the bone conduction hearing device.

[0016] In some embodiments, the state of the bone conduction hearing device includes at least one of the following: normal state and abnormal state; the abnormal state includes one or more of the following: incorrect wearing, abnormal structure of the bone conduction hearing device, foreign object intrusion, and foreign object obstruction.

[0017] One embodiment of this application also provides a system for detecting the status of a bone conduction hearing device, wherein the system includes a sound generation module, a feedback signal generation module, a feedback analysis module, and a signal processing module; wherein: the sound generation module is used to generate a third sound based on a first signal; wherein the first signal is generated by the signal processing unit; the feedback signal generation module is used to receive the third sound and generate a feedback signal; the feedback analysis module is used to determine the feedback path transfer function from the speaker to the microphone of the bone conduction hearing device based on the feedback signal and the first signal; obtain at least one preset feedback path transfer function; compare the feedback path transfer function and the at least one preset feedback path transfer function; the signal processing module is used to determine the status of the bone conduction hearing device according to the comparison result.

[0018] One embodiment of this application also provides a computer-readable storage medium storing computer instructions. When a computer reads the computer instructions in the storage medium, the computer executes: generating a third sound based on a first signal; wherein the first signal is a test signal generated by the computer; receiving the third sound and generating a feedback signal; determining a feedback path transfer function from the speaker to the microphone of the bone conduction hearing device based on the feedback signal and the first signal; acquiring at least one preset feedback path transfer function; comparing the feedback path transfer function and the at least one preset feedback path transfer function; and determining the state of the bone conduction hearing device based on the comparison result. Attached Figure Description

[0019] This application 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:

[0020] Figure 1 This is a schematic diagram illustrating an application scenario of a transfer function detection system according to some embodiments of this application;

[0021] Figure 2 This is an exemplary flowchart of a method for obtaining a vibration transfer function according to some embodiments of this application;

[0022] Figure 3 This is an exemplary block diagram of a vibration transfer function acquisition system according to some embodiments of this application;

[0023] Figure 4 This is a schematic diagram of a transfer function detection system when the detector is in a first position, as shown in some embodiments of this application;

[0024] Figure 5 This is a schematic diagram of a transfer function detection system when the detector is in a second position, as shown in some embodiments of this application;

[0025] Figure 6 It is a graph of the first feedback path transfer function shown in some embodiments of this application;

[0026] Figure 7 It is a graph of the second feedback path transfer function according to some embodiments of this application;

[0027] Figure 8 It is a graph of the vibration transfer function according to some embodiments of this application;

[0028] Figure 9 This is an exemplary flowchart of a method for detecting the status of a bone conduction hearing device according to some embodiments of this application; and

[0029] Figure 10 This is an exemplary block diagram of a system for detecting the status of a bone conduction hearing device according to some embodiments of this application. Detailed Implementation

[0030] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. 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.

[0031] It should be understood that the terms "system," "device," 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.

[0032] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" are not specifically singular and may include plural forms. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0033] Flowcharts are used in this application to illustrate the operations performed by the system according to embodiments of this application. It should be understood that the preceding or following operations are not necessarily performed precisely in sequence. 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.

[0034] For ease of explanation, the following description uses a bone conduction speaker or loudspeaker as an example to illustrate the use and application of the sound-generating unit. It should be noted that the above description is provided for illustrative purposes only and is not intended to limit the scope of this application.

[0035] Without loss of generality, the descriptions of bone conduction-related technologies in this invention will use terms such as "bone conduction hearing device," "bone conduction hearing aid," "bone conduction loudspeaker," "loudspeaker device," or "bone conduction headphones." This description represents only one form of bone conduction application; for those skilled in the art, "loudspeaker" or "headphones" can be replaced with other similar terms, such as "player" or "hearing aid." In fact, the various implementations of this invention can be readily applied to other non-loudspeaker-type hearing devices. For example, those skilled in the art, after understanding the basic principles of bone conduction loudspeakers, may make various formal and detailed modifications and changes to the specific methods and steps of implementing bone conduction loudspeakers without departing from these principles. In particular, adding environmental sound pickup and processing functions to the bone conduction loudspeaker enables it to function as a hearing aid. For example, microphones and other transducers can pick up sounds from the user's / wearer's surroundings and, using a certain algorithm, process the sound (or generate electrical signals) and transmit it to the bone conduction loudspeaker section. In essence, bone conduction speakers can be modified to pick up ambient sound, and after signal processing, the sound is transmitted to the user / wearer through the bone conduction speaker, thus realizing the function of a bone conduction hearing aid. For example, the algorithms mentioned here may include one or more combinations of noise cancellation, automatic gain control, acoustic feedback suppression, wide dynamic range compression, active environment recognition, active noise cancellation, directional processing, tinnitus processing, multi-channel wide dynamic range compression, active howling suppression, and volume control.

[0036] In some embodiments, hearing devices (e.g., hearing aids) typically incorporate both a microphone and a speaker. A portion of the sound emitted by the speaker may be received by the microphone, resulting in feedback or causing the user (e.g., the wearer) to hear an echo while using the device. To suppress echo or feedback, it is necessary to minimize the speaker's influence on the microphone (e.g., removing the speaker's sound from the signal received by the microphone). The speaker's influence on the microphone is typically represented by a feedback path transfer function between the speaker and microphone. In some embodiments, in bone conduction hearing devices (e.g., bone conduction hearing aids), the sound produced by the bone conduction speaker affects the microphone simultaneously through vibration and air conduction. Therefore, the feedback path between the bone conduction speaker and microphone includes both air conduction and vibration transmission paths. These two transmission paths correspond to different transfer functions between the bone conduction speaker and microphone. In some scenarios, it is necessary to better evaluate the influence of the bone conduction speaker on the microphone through different transmission paths, especially the vibration transmission path. Measuring the vibration transfer function typically requires additional devices such as accelerometers, making the testing complex.

[0037] Therefore, some embodiments of this application provide a method for obtaining the vibration transfer function of a bone conduction loudspeaker to other locations (e.g., the location of a microphone, which is connected to the bone conduction loudspeaker via a housing). The method utilizes a detector to receive a first sound at a first location that includes both air conduction and vibration transmission paths, and a second sound at a second location that includes only air conduction. The vibration transfer function is then calculated. This testing method is more efficient and easier to operate.

[0038] Figure 1 This is a schematic diagram illustrating an application scenario of a transfer function detection system according to some embodiments of this application. For ease of description, the transfer function detection system 100 may be simply referred to as System 100. System 100 may include a detector 110, a hearing device 120, a database 130, and a processor 140. The various components in System 100 can be interconnected via wireless connections, wired connections, or any other communication and / or connection and / or any combination of such connections that enables data transmission and / or reception. In some embodiments, System 100 can be used to acquire the vibration transfer function of a bone conduction hearing device and detect the state of the bone conduction hearing device.

[0039] In some embodiments, wired connections include, but are not limited to, the use of metallic cables, optical cables, or hybrid cables of metallic and optical types, such as: coaxial cables, communication cables, flexible cables, spiral cables, non-metallic sheathed cables, metallic sheathed cables, multi-core cables, twisted-pair cables, ribbon cables, shielded cables, telecommunications cables, two-strand cables, parallel two-core conductors, and twisted-pair wires.

[0040] The examples described above are for illustrative purposes only. The medium for wired connections can also be other types, such as other electrical or optical signal transmission carriers. Wireless connections include, but are not limited to, radio communication, free-space optical communication, acoustic communication, and electromagnetic induction. Radio communication includes, but is not limited to, IEEE 302.11 series standards, IEEE 302.15 series standards (e.g., Bluetooth and Wi-Fi), first-generation mobile communication technologies, second-generation mobile communication technologies (e.g., FDMA, TDMA, SDMA, CDMA, and SSMA), General Packet Radio Service technologies, third-generation mobile communication technologies (e.g., CDMA2000, WCDMA, TD-SCDMA, and WiMAX), fourth-generation mobile communication technologies (e.g., TD-LTE and FDD-LTE), satellite communication (e.g., GPS), near-field communication (NFC), and other technologies operating in the ISM band (e.g., 2.4 GHz); free-space optical communication includes, but is not limited to, visible light and infrared signals; acoustic communication includes, but is not limited to, sound waves and ultrasonic signals; and electromagnetic induction includes, but is not limited to, near-field communication technologies. The examples described above are for illustrative purposes only. The wireless connection medium can also be of other types, such as Z-wave technology, other paid civilian radio bands, and military radio bands.

[0041] In some embodiments, the hearing device 120 may typically include an air conduction speaker and a bone conduction speaker. In some embodiments, the hearing device 120 may include a bone conduction speaker (e.g., as shown in the image). Figure 4 and Figure 5 The bone conduction speaker 122 and housing 121 are shown. The bone conduction speaker 122 and other components (e.g., microphone) can be housed within the housing 121. To suppress the influence of the bone conduction speaker 122 on the microphone, it is necessary to calculate the distance from the bone conduction speaker 122 to a certain location of interest in the device (e.g., such as...). Figure 1 , Figure 4 The vibration transfer function (shown in 123). It should be noted that the location of interest can be the placement of a microphone (e.g., the microphone actually installed on the hearing device 120), or any location inside or outside the hearing device 120 (e.g., any part of the hearing device 120 that is rigidly or elastically connected to the bone conduction speaker 122).

[0042] In some embodiments, detector 110 can receive sound emitted by bone conduction speaker 122 and then generate a feedback signal based on the sound. The feedback signal can reflect the influence of bone conduction speaker 122 on detector 110 (its location). For example, the feedback signal can be sent to processor 140, which then calculates the feedback path transfer function from bone conduction speaker 122 to detector 110 based on the feedback signal. In some embodiments, detector 110 can also receive ambient sound and generate an audio signal based on the sound. Ambient sound can include, for example, human voices, vehicle sounds, and ambient noise. In some embodiments, detector 110 can send the audio signal to bone conduction speaker 122 and processor 140, and bone conduction speaker 122 can generate sound based on the audio signal. In some embodiments, detector 110 can send the audio signal to processor 140, which then sends it to bone conduction speaker 122, and bone conduction speaker 122 can generate sound based on the audio signal. In some embodiments, detector 110 can include a sound-to-electric transducer, such as a microphone. For example, the microphone may include a ribbon microphone, a microelectromechanical system (MEMS) microphone, a dynamic microphone, a piezoelectric microphone, a condenser microphone, a carbon microphone, an analog microphone, a digital microphone, etc., or any combination thereof. As another example, the microphone may include an omnidirectional microphone, a unidirectional microphone, a bidirectional microphone, a cardioid microphone, etc., or any combination thereof. In some embodiments, the detector 110 may also include an air conduction microphone and a bone conduction microphone. For ease of description, this application will describe the microphone as the detector 110.

[0043] Processor 140 can process data and / or information obtained from detector 110, bone conduction speaker 122, database 130, or other components of system 100. For example, processor 140 can process the electrical signal generated after sound is picked up by microphone from bone conduction speaker 122, and use it to calculate the feedback path transfer function from bone conduction speaker 122 to microphone. In some embodiments, processor 140 can be a single server or a group of servers. The server group can be centralized or distributed. In some embodiments, processor 140 can be local or remote. For example, processor 140 can access information and / or data from detector 110, bone conduction speaker 122, and / or database 130. As another example, processor 140 can be directly connected to detector 110, bone conduction speaker 122, and / or database 130 to access information and / or data.

[0044] In some embodiments, the processor 140 may include a test signal generation unit 141 and a feedback path calculation unit 142 (e.g., ...). Figure 4 and 5(As shown). The test signal generation unit 141 can send a test sound signal (e.g., a first test sound signal) to the bone conduction speaker 122 and the feedback path calculation unit 142. The bone conduction speaker 122 can generate sound (e.g., a first sound) based on the test sound signal. After receiving the sound emitted by the bone conduction speaker 122, the detector 110 can generate a feedback signal (e.g., a first feedback signal) based on the sound and send the feedback signal to the feedback path calculation unit 142. The feedback path calculation unit 142 can calculate the feedback path transfer function based on the test sound signal and the feedback signal output by the detector 110. In some embodiments, based on the feedback signal including both the air conduction path and the vibration transmission path and its corresponding test sound signal, the feedback path calculation unit 142 can determine the corresponding feedback path transfer function (i.e., the first feedback path transfer function). Based on the feedback signal containing only the air conduction path and its corresponding test sound signal, the feedback path calculation unit 142 can determine the corresponding feedback path transfer function (i.e., the second feedback path transfer function). In some embodiments, the feedback path calculation unit 142 can determine the vibration transmission function based on the two feedback path transfer functions determined above.

[0045] In some embodiments, the processor 140 may further include a feedback analysis unit and a signal processing unit. In some embodiments, the processor 140 may determine the feedback path transfer function from the bone conduction speaker 122 of the bone conduction hearing device to the detector 110 in real time based on the feedback signal from the detector 110. The processor 140 may also compare the real-time determined feedback path transfer function with other preset feedback path transfer functions to determine the real-time state of the bone conduction hearing device.

[0046] Database 130 may store data, instructions, and / or any other information, such as the first feedback path transfer function described above. In some embodiments, database 130 may store data obtained from detector 110, bone conduction speaker 122, and / or processor 140. In some embodiments, database 130 may store data and / or instructions used by processor 140 to perform or complete the exemplary methods described herein. In some embodiments, database 130 may include mass storage, removable storage, volatile read-write storage, read-only storage (ROM), and any combination thereof. In some embodiments, database 130 may be implemented on a cloud platform.

[0047] In some embodiments, database 130 may communicate with at least one other component in system 100 (e.g., processor 140). At least one component in system 100 may access data stored in database 130 (e.g., a first feedback path transfer function). In some embodiments, database 130 may be part of processor 140.

[0048] Figure 2 This is an exemplary flowchart illustrating a method for obtaining a vibration transfer function according to some embodiments of this application. Specifically, method 200 can be executed by system 100 (e.g., processor 140). For example, method 200 can be stored in a storage device (e.g., database 130) in the form of a program or instructions, and method 200 can be implemented when system 100 (e.g., processor 140) executes the program or instructions.

[0049] Step 210 involves the test signal generation unit 141 generating a first test tone signal and a second test tone signal. In some embodiments, step 210 may be performed by the test tone generation module 310.

[0050] In some embodiments, the test signal generation unit 141 may be a signal source capable of generating and outputting electrical signals with certain characteristics. For example, the first test tone signal or the second test tone signal may include white noise signals, pure tone signals, pulse signals, narrowband noise, narrowband warbling, modulated tones, and / or swept tone signals. When the sound-generating device (e.g., bone conduction speaker 122) receives a white noise signal, the sound-generating device may generate noise with the same energy density at all frequencies, i.e., white noise. When the sound-generating device receives a pure tone signal, the sound-generating device may generate a sound with a single tone, i.e., a pure tone. When the sound-generating device receives a swept tone signal, the sound-generating device may generate a sound with a frequency that changes continuously from high to low (or from low to high) within the same frequency band, i.e., a swept tone.

[0051] In some embodiments, the first test tone signal and the second test tone signal are signals generated sequentially by the test signal generation unit 141 at different time points and used respectively to test the device under test. In some embodiments, to maintain consistency between the two test conditions, the first test tone signal and the second test tone signal can be completely identical, that is, the first test tone signal and the second test tone signal have the same type and frequency. For example, the first test tone signal and the second test tone signal can be completely identical sweep frequency signals. In some embodiments, the first test tone signal and the second test tone signal can also be of different types. For example, the first test tone signal can be white noise, and the second test tone signal can be a pure tone.

[0052] In some alternative embodiments, the testing of the device under test under the first test tone signal and the testing under the second test tone signal can be replaced by completing them simultaneously in one go. In this case, the test signal generation unit 141 can generate only one type of test tone signal, such as generating only the first test tone signal or the second test tone signal, which can also achieve the purpose of testing. For details, please refer to the relevant description of step 230.

[0053] Step 220: The bone conduction speaker 122 generates a first sound and a second sound based on the first test tone signal and the second test tone signal, respectively.

[0054] The first and second test tone signals can be transmitted to the bone conduction speaker 122 in the form of electrical signals, which can then be converted into a first sound and a second sound, respectively. In some embodiments, the bone conduction speaker 122 may include a vibrating plate and a transducer. The transducer may be configured to generate vibrations, for example, by converting the electrical signals corresponding to the first and second test tone signals into mechanical vibrations. The transducer may drive the vibrating plate to vibrate. By way of example only, the vibrating plate may be mechanically connected to the transducer and vibrate with it. In practical applications (e.g., when a user wears the hearing device 120), the vibrating plate may contact the user's skin and transmit vibrations through human tissue and bones to the auditory nerve, thereby enabling the user to hear sounds.

[0055] In some embodiments, the bone conduction speaker 122 can sequentially generate a first sound and a second sound based on a first test tone signal and a second test tone signal. For example, the first sound can be generated first, and the second sound can be generated after the microphone receives the first sound and outputs a first feedback signal. Alternatively, the second sound can be generated first, and the first sound can be generated after the microphone receives the second sound and outputs a second feedback signal.

[0056] In some embodiments, the first sound and the second sound can be generated sequentially by the same bone conduction speaker 122 at the same location in the same hearing device 120. In this case, by changing the position of the microphone, the effect of the sound emitted by the bone conduction speaker 122 on different locations can be obtained, thereby obtaining the transfer function corresponding to different acoustic paths. In other embodiments, the bone conduction speaker 122 may include two bone conduction speakers 122 with identical structure and materials, and the two bone conduction speakers 122 generate the first sound and the second sound sequentially based on the first test tone signal and the second test tone signal, respectively.

[0057] Step 230: At least one detector receives a first sound at a first position and outputs a first feedback signal, and receives a second sound at a second position and outputs a second feedback signal.

[0058] At least one detector can receive a first sound and a second sound respectively and generate a first feedback signal and a second feedback signal based on the first sound and the second sound, and send the first feedback signal and the second feedback signal to a feedback path test device (e.g., feedback path calculation unit 142).

[0059] For ease of description, the following will assume that at least one detector includes an air conduction microphone (e.g., Figure 4 and Figure 5 The following explanation uses a microphone as an example. The microphone at the first position can receive the first sound transmitted by the bone conduction speaker 122 in the first manner. For example, the bone conduction speaker 122 can be fixed to the hearing device 120 (i.e., the bone conduction speaker 122 is rigidly or elastically connected to the hearing device 120), and the first position can be close to the hearing device 120 (e.g., ...). Figure 1 or Figure 4 Another location of the housing 121). When the microphone is in the first location, the microphone is rigidly or elastically connected to the hearing device 120. According to the sound-generating principle of the bone conduction speaker 122, when the bone conduction speaker 122 generates the first sound, it causes the hearing device 120 (housing) to vibrate, and the vibration of the hearing device 120 is transmitted to the microphone located close to the hearing device 120. For example, as... Figure 4 As shown, the first position can be a location attached to the housing 121 of the hearing device 120. Assuming the vibration direction of the housing 121 is parallel to the vibration direction of the microphone diaphragm, the vibration of the housing 121 will simultaneously cause the microphone diaphragm to vibrate. Simultaneously, when the bone conduction speaker 122 generates the first sound, it also causes the surrounding air to vibrate, and this air vibration is transmitted to the microphone via air conduction. Therefore, the first sound is transmitted to the microphone simultaneously through both vibration conduction and air conduction. In other words, the aforementioned first method includes both vibration conduction and air conduction.

[0060] In some embodiments, the microphone may generate a first feedback signal based on the first sound transmitted through the two transmission paths described above, and the microphone may also send the first feedback signal to the feedback path calculation unit 142 and / or store it in a storage device (e.g., database 130).

[0061] Similarly, the microphone in the second position can receive the second sound transmitted by the bone conduction speaker 122 in the second manner. For example, the second position may not be in contact with the hearing device 120 (housing 121) but may be close to the first position. When the microphone is in the second position, it can be considered that the microphone is suspended relative to the hearing device 120. Optionally, the second position may be located inside or outside the hearing device 120 (housing), as long as the microphone is not rigidly or elastically connected to the hearing device 120 in that position. For example, in Figure 5In the second position, since the microphone is not in contact with the housing 121, the microphone diaphragm only receives sound transmitted through the air and is not affected by the vibration of the housing 121. Therefore, the second sound is transmitted to the microphone only through air conduction. That is, the second method described above only includes air conduction. In some embodiments, the microphone can generate a second feedback signal based on the second sound transmitted through the air conduction path, and the microphone can also send the second feedback signal to the feedback path calculation unit 142 and / or store it in a storage device (e.g., database 130). It should be noted that when the distance between the second position and the first position is very small (e.g., less than 1 mm, 5 mm, 1 cm, 5 cm), the air conduction path from the bone conduction speaker 122 to the first position can be approximately considered to be the same as the air conduction path from the bone conduction speaker 122 to the second position.

[0062] In some alternative embodiments, when the microphone is in the first position and the vibration direction of the housing 121 is perpendicular to the vibration direction of the microphone diaphragm, the vibration of the housing 121 will not cause the vibration of the microphone's vibrating components (e.g., the diaphragm). In this case, it can be assumed that the microphone in the first position will still only receive sound transmitted through the air. Therefore, the process of the microphone receiving a second sound in the second position away from the housing 121 can be replaced by adjusting the microphone's orientation so that the diaphragm vibration direction is perpendicular to the vibration direction of the housing 121 in the first position. Since the diaphragm is not affected by the vibration of the housing 121, even if the microphone is in contact with the housing 121, the second sound it receives will only be transmitted through air conduction. Therefore, when the microphone diaphragm vibration direction is perpendicular to the vibration direction of the housing 121, only the air conduction feedback path transfer function needs to be considered when calculating the feedback path transfer function. It can be understood that when the bone conduction speaker 122 generates the first sound and the second sound respectively, it is only necessary to set the microphone diaphragm vibration direction to be parallel or perpendicular to the vibration direction of the housing 121 in the first position, and the microphone can also output a first feedback signal and a second feedback signal according to the received first and second sounds respectively.

[0063] In some embodiments, at least one detector (e.g., an air conduction microphone or a microphone) may also include a first detector (e.g., a first air conduction microphone) and a second detector (e.g., a second air conduction microphone) with the same structure and material. In some embodiments, at least one detector (e.g., an air conduction microphone or a microphone) may also include a first detector (e.g., a silicon microphone) and a second detector (e.g., an electret microphone) with different structures and materials. In some embodiments, the microphone may be an air conduction microphone and a bone conduction microphone. For ease of understanding, in this application, the microphone may be an air conduction microphone. When receiving the first sound and the second sound respectively, the first detector and the second detector may be located at a first position and a second position respectively, for receiving the first sound and the second sound. Similar to the foregoing embodiments, after receiving the first sound, the first detector may output a first feedback signal, and after receiving the second sound, the second detector may output a second feedback signal.

[0064] In other embodiments, the first detector and the second detector can be placed simultaneously at the first position and the second position, respectively, and the first detector and the second detector can receive the same sound simultaneously. For example, the bone conduction loudspeaker 122 generates a first sound based on only one test tone signal (e.g., a first test tone signal), and the first detector and the second detector are located at the first position and the second position, respectively, and receive the first sound simultaneously. In this embodiment, although the first detector and the second detector receive the same sound, the feedback signals output by the first detector and the second detector are different because the transmission path of the first sound received by the first detector includes both air conduction and vibration transmission paths, while the first sound received by the second detector only includes the air conduction transmission path. For convenience, the feedback signal output by the first detector can also be called the first feedback signal, and the feedback signal output by the second detector can also be called the second feedback signal. Moreover, the difference between the first feedback signal and the second feedback signal output by the same detector after being located at the first position and the second position in the previous embodiments is small, and they can be considered to be approximately the same.

[0065] In step 240, the feedback path calculation unit 142 determines the vibration transfer function from the bone conduction loudspeaker 122 to the first position based on the first test tone signal, the second test tone signal, the first feedback signal, and the second feedback signal. In some embodiments, step 240 may be performed by the processing module 320.

[0066] In some embodiments, upon receiving the first feedback signal and the second feedback signal from the microphone output, the feedback path calculation unit 142 can calculate the feedback path transfer function based on the first test tone signal, the second test tone signal, the first feedback signal, and the second feedback signal using the feedback path transfer function determination principle. In some embodiments, the feedback path calculation unit 142 can obtain the first test tone signal from the test signal generation unit 141. In some embodiments, after receiving the first test tone signal and the first feedback signal, the feedback path calculation unit 142 can calculate the first feedback path transfer function of the first sound transmitted from the bone conduction speaker 122 to the first position based on the first test tone signal and the first feedback signal. For example, the feedback path calculation unit 142 can perform algorithmic transformations on the first test tone signal and the first feedback signal respectively to obtain the first test tone transformed signal and the first feedback transformed signal. In some embodiments, the feedback path calculation unit 142 can use Z-transform to transform the first test tone signal and the first feedback transformed signal. For example, the first test tone signal input to the bone conduction speaker 122 is transformed by Z to obtain the first test tone transformed signal, and the first feedback signal output from the air conduction microphone is transformed by Z to obtain the first feedback transformed signal. In other embodiments, the algorithm transformation may also include speech model solving methods such as Fourier transform, Laplace transform, or linear predictive encoder.

[0067] In some embodiments, the transfer function determination method may include, but is not limited to, the cross-correlation method, the adaptive estimation method, etc. In some embodiments, the transfer function determination method may also be to obtain the transformed signal by performing an algorithmic transformation on the sound signal and the electrical signal, and then calculate the transfer function based on the transformed signal. For details, please refer to the calculation method of formulas (1)-(5).

[0068] For illustrative purposes, the feedback path calculation unit 142 can obtain the first feedback path transfer function based on the first test transformation signal and the first feedback transformation signal using formula (1):

[0069]

[0070] Wherein, Y1(z) is the first test tone transformation signal, X1(z) is the first feedback transformation signal, and F1(z) is the first feedback path transfer function. As mentioned above, the first feedback path transfer function F1(z) includes the effects of the air conduction transmission path and the vibration transmission path between the bone conduction loudspeaker 122 and the first position.

[0071] In some embodiments, the feedback path calculation unit 142 can obtain a second test tone signal from the test signal generation unit 141. In some embodiments, after receiving the second test tone signal and the second feedback signal, the feedback path calculation unit 142 can calculate a second feedback path transfer function based on the second test tone signal and the second feedback signal, allowing the second sound to be transmitted from the bone conduction speaker 122 to the second position. For example, the feedback path calculation unit 142 can perform algorithmic transformations on the second test tone signal and the second feedback signal respectively to obtain a second test tone transformed signal and a second feedback transformed signal. In some embodiments, the feedback path calculation unit 142 can use Z-transform to transform the second test tone signal and the second feedback signal. For example, the second test tone signal input to the bone conduction speaker 122 is transformed by Z-transform to obtain a second test tone transformed signal, and the second feedback signal output from the microphone is transformed by Z-transform to obtain a second feedback transformed signal.

[0072] Similarly, for illustrative purposes, the feedback path calculation unit 142 can obtain the second feedback path transfer function based on the second test tone transformation signal and the second feedback transformation signal using formula (2):

[0073]

[0074] Wherein, Y2(z) is the second test tone transformation signal, X2(z) is the second feedback transformation signal, and F2(z) is the second feedback path transfer function. As mentioned above, the second feedback path transfer function F2(z) only includes the influence of the air conduction transmission path between the bone conduction loudspeaker 122 and the second position (or the first position).

[0075] By calculating using the above formulas (1) and (2), the feedback path calculation unit 142 can determine the first feedback path transfer function corresponding to the first sound transmitted through the air conduction transmission path and the vibration transmission path, and determine the second feedback path transfer function corresponding to the second sound transmitted through the air conduction transmission path. Then, through subsequent calculations, the vibration transmission function from the bone conduction speaker 122 to the first position can be determined.

[0076] In some embodiments, the feedback path calculation unit 142 may determine the vibration transfer function of the bone conduction loudspeaker 122 to the first position based on the first feedback path transfer function F1(z) and the second feedback path transfer function F2(z).

[0077] Specifically, since the first transmission path of the first sound received by the microphone at the first position includes both air conduction and vibration transmission paths, and the second transmission path of the second sound received by the microphone at the second position only includes air conduction, the output signals of the air conduction microphone (i.e., the first feedback signal and the second feedback signal) are different in the two cases.

[0078] For illustrative purposes, the first feedback path transfer function, which includes the air conduction path and the vibration transmission path, can be expressed as:

[0079] F1(z)=A1(z)+B1(z) (3)

[0080] Wherein, A1(z) is the air conduction feedback path transfer function from the bone conduction speaker 122 to the first position, and B1(z) is the vibration transfer function from the bone conduction speaker 122 to the first position.

[0081] Figure 6 The graph of the first feedback path transfer function F1(z) determined by formula (3) is shown.

[0082] In some embodiments, considering the small distance between the second position and the first position, the air conduction path from the bone conduction speaker 122 to the second position can be approximately equivalent to the air conduction path from the bone conduction speaker 122 to the first position. Therefore, the second feedback path transfer function, which only includes the air conduction path, can be expressed as:

[0083] F2(z)=A2(z) (4)

[0084] Wherein, A2(z) is the air conduction feedback path transfer function from the bone conduction speaker 122 to the second position, which is the same as or approximately the same as the air conduction feedback path transfer function A1(z) from the bone conduction speaker 122 to the first position. Figure 7 A graph of the second feedback path function F2(z) determined by formula (2) is shown. As mentioned above, the second feedback path transfer function F2(z) only includes the influence of the air conduction transfer path between the bone conduction loudspeaker 122 and the second position (or the first position).

[0085] In some embodiments, the feedback path calculation unit 142 can determine the vibration transfer function from the bone conduction loudspeaker 122 to the first position based on the first feedback path transfer function F1(z) and the second feedback path transfer function F2(z). Specifically, since the second feedback path transfer function F2(z) only includes the air conduction feedback path transfer function A1(z), while the first feedback path transfer function F1(z) includes both the air conduction feedback path transfer function A1(z) and the vibration transfer function B1(z), the feedback path calculation unit 142 can subtract formula (3) and formula (4) to calculate the vibration transfer function B1(z):

[0086] B1(z)=F1(z)-F2(z) (5)

[0087] Figure 6It is a graph of the transfer function of the first feedback path, which includes the air conduction path and the vibration transmission path. Figure 6 The curve represents the case where, at the corresponding frequency, the first sound received at the first position simultaneously has both an air conduction feedback path and a vibration transmission path. It can be seen that in the range around 1000Hz (e.g., 600Hz-1000Hz), the effect of the bone conduction speaker on the first position simultaneously through both the air conduction feedback path and the vibration transmission path exhibits a low point compared to other frequency ranges (i.e., the effect can be understood as relatively small). In the ranges of 300Hz-400Hz and 2000Hz-3000Hz, the effect of the bone conduction speaker on the first position simultaneously through both the air conduction feedback path and the vibration transmission path exhibits a high point compared to other frequency ranges (i.e., the effect can be understood as relatively large).

[0088] Figure 7 It is a graph of the transfer function of the second feedback path, which only includes the gas conduction path. Figure 7 The curve represents the case where only the air conduction feedback path exists in the second sound received at the second position at the corresponding frequency. Specifically, when the frequency is in the range of 0Hz-1000Hz, the influence of the bone conduction speaker on the second position through the air conduction feedback path is relatively small; when the frequency is in the range of 1000Hz-3000Hz, the influence of the bone conduction speaker on the second position through the air conduction feedback path is relatively large. In some embodiments, when using... Figure 6 The first feedback path transfer function minus Figure 7 When considering the second feedback path transfer function in the code, we can obtain the following: Figure 8 The curve shown. From Figure 8 It can be seen that the vibration transmission path has a greater impact on the frequency range of 0Hz-1000Hz, and a smaller impact on the frequency range above 1000Hz. Combined with... Figure 6 , Figure 7 and Figure 8 It can be seen that the effect of the bone conduction speaker on the first position through the vibration transmission path is mainly concentrated in the lower frequency range (e.g., less than 1000Hz), while the effect of the bone conduction speaker on the first position (or second position) through the air conduction transmission path is mainly concentrated in the higher frequency range (e.g., greater than 1000Hz).

[0089] In some embodiments, the feedback path calculation unit 142 may determine the vibration feedback signal from the bone conduction speaker 122 to the first position based on the first feedback signal and the second feedback signal.

[0090] For illustrative purposes, the feedback path calculation unit 142 can obtain the vibration feedback signal based on the first feedback signal and the second feedback signal using formula (6):

[0091] Xd =X1-X2 (6)

[0092] Where X1 is the first feedback signal, X2 is the second feedback signal, and X... d This is the vibration feedback signal.

[0093] In some embodiments, the feedback path calculation unit 142 may determine the vibration transfer function from the bone conduction loudspeaker 122 to the first position based on the first test tone signal, the second test tone signal and the vibration feedback signal.

[0094] In some embodiments, the feedback path calculation unit 142 can perform algorithmic transformations on the first test tone signal, the second test tone signal, and the vibration feedback signal respectively to obtain the first test tone transformed signal, the second test tone transformed signal, and the vibration feedback transformed signal. For example, the first test tone signal Y1 is transformed using the Z algorithm to obtain the first test tone transformed signal Y1(z), the second test tone signal Y2 is transformed using the Z algorithm to obtain the second test tone transformed signal Y2(z), and the second test tone signal X1 is transformed using the Z algorithm. d The second test tone transformed signal X is obtained by performing Z-algorithm transformation. d (z).

[0095] In some embodiments, the feedback path calculation unit 142 can determine the first feedback path transfer function from the sound-generating unit to the first position based on the first test tone transformation signal, the second test tone transformation signal, and the vibration feedback transformation signal. Specifically, the feedback path calculation unit 142 can calculate the average or weighted average of the first test tone transformation signal and the second test tone transformation signal to obtain the test tone mean transformation signal.

[0096] For illustrative purposes, the feedback path calculation unit 142 can obtain the test tone mean transformation signal based on the first test tone transformation signal and the second test tone transformation signal using formula (7):

[0097] Y d (z)=(Y1(z)+Y2(z)) / 2 (7)

[0098] Where Y1(z) is the first test tone transformation signal, Y2(z) is the second test tone transformation signal, and Y... d (z) is the mean transformation signal of the test tone.

[0099] In some embodiments, the feedback path calculation unit 142 can obtain the vibration transfer function from the bone conduction loudspeaker 122 to the first position based on the test tone mean transformation signal and the vibration feedback transformation signal.

[0100] For illustrative purposes, the feedback path calculation unit 142 can obtain the vibration transfer function from the bone conduction loudspeaker 122 to the first position based on the test tone mean transformation signal and the vibration feedback transformation signal using formula (8):

[0101]

[0102] Among them, Y d (z) is the mean transformation signal of the test tone, X d (z) is the vibration feedback transformation signal, and B1(z) is the vibration transfer function.

[0103] In some embodiments, the feedback path calculation unit 142 can also calculate the average value and weighted average value of the first test tone signal and the second test tone signal to obtain the test tone average signal. The test tone average signal and the vibration feedback signal are then transformed using an algorithm to obtain the test tone average transformed signal and the vibration feedback transformed signal. Finally, based on the test tone average transformed signal and the vibration feedback transformed signal, the vibration transfer function from the bone conduction loudspeaker 122 to the first position is obtained.

[0104] It should be noted that the above description is provided for illustrative purposes only and is not intended to limit the scope of this application. Various changes and modifications can be made by those skilled in the art based on the guidance of this application. Features, structures, methods, and other features of the exemplary embodiments described in this application can be combined in various ways to obtain other and / or alternative exemplary embodiments. For example, the feedback path calculation unit 142 may include a first calculation unit and a second calculation unit, the first calculation unit being used to calculate a first feedback path transfer function of a first feedback path, and the second calculation unit being used to calculate a second feedback path transfer function. However, these changes and modifications will not depart from the scope of this application.

[0105] Figure 3 This is an exemplary block diagram of a vibration transfer function acquisition system according to some embodiments of this application. The vibration transfer function acquisition system 300 may be simply referred to as System 300. For example... Figure 3 As shown, the system 300 may include a test tone generation module 310 and a processing module 320. In some embodiments, the system 300 may be composed of... Figure 1 The system 100 shown (e.g., processor 140) is implemented.

[0106] The test tone generation module 310 can be used to generate a first test tone signal and a second test tone signal. In some embodiments, the first test tone signal or the second test tone signal may include at least one of white noise signal, pure tone signal, pulse signal, narrowband noise, narrowband warbling tone, modulated tone and / or swept tone signal. In some embodiments, the first test tone signal and the second test tone signal have the same type and frequency; for example, the first test tone signal and the second test tone signal may be pure tone signals of the same frequency. In some embodiments, the first test tone signal and the second test tone signal may also have different types. For example, the first test tone signal may be white noise, and the second test tone signal may be a pure tone. In some embodiments, the test tone generation module 310 may generate only one type of test tone signal, such as only generating the first test tone signal or the second test tone signal, which can also achieve the purpose of obtaining the vibration transfer function. For details, please refer to the relevant description of step 230.

[0107] Processing module 320 can be used to determine the vibration transfer function from the bone conduction speaker 122 to a first position based on a first test tone signal, a second test tone signal, a first feedback signal, and a second feedback signal. The first feedback signal reflects the signal transmitted from the bone conduction speaker 122 to the first position through a vibration transmission path and an air conduction transmission path. The second feedback signal reflects the signal transmitted from the bone conduction speaker 122 to the second position through an air conduction transmission path. The first and second feedback signals can be output by at least one microphone after receiving the first sound at the first position and after receiving the second sound at the second position, respectively. The first and second sounds can be generated by the bone conduction speaker 122 based on the first and second test tone signals, respectively. For more details on generating the first and second sounds based on the first and second test tone signals, please refer to the detailed description of step 220, which will not be repeated here.

[0108] In some embodiments, after receiving the first test tone signal, the processing module 320 can calculate a first feedback path transfer function based on the first test tone signal and the first feedback signal, showing the first sound transmitted from the bone conduction speaker 122 to the first position. For more information on calculating the first feedback path transfer function, please refer to [link to relevant documentation]. Figure 2 The detailed description of step 240 is omitted here.

[0109] In some embodiments, the processing module 320 may also calculate a second feedback path transfer function based on the second test tone signal and the second feedback signal, showing the transmission of the second sound from the bone conduction speaker 122 to the second position. For more information on calculating the second feedback path transfer function, please refer to [link to relevant documentation]. Figure 2 The detailed description of step 240 is omitted here.

[0110] In some embodiments, the processing module 320 may determine the vibration transfer function from the bone conduction speaker 122 to the first position based on the first feedback path transfer function and the second feedback path transfer function. For more information on determining the vibration transfer function from the bone conduction speaker 122 to the first position, please refer to [link to relevant documentation]. Figure 2 The detailed description of step 240 is omitted here.

[0111] In some embodiments, the processing module 320 may determine the vibration feedback signal from the bone conduction speaker 122 to the first position based on the first feedback signal and the second feedback signal. In some embodiments, the processing module 320 may also determine the vibration transfer function from the bone conduction speaker 122 to the first position based on the first test tone signal, the second test tone signal, and the vibration feedback signal. For more information on determining the vibration transfer function from the bone conduction speaker 122 to the first position, please refer to [link to relevant documentation]. Figure 2 The detailed description of step 240 is omitted here.

[0112] It should be noted that the above description is provided for illustrative purposes only and is not intended to limit the scope of this application. Various changes and modifications can be made by those skilled in the art based on the guidance of this application. Features, structures, methods, and other features of the exemplary embodiments described in this application can be combined in various ways to obtain other and / or alternative exemplary embodiments. For example, processing module 320 may include a first processing module and a second processing module, the first processing module being used to calculate a first feedback path transfer function of a first feedback path, and the second processing module being used to calculate a second feedback path transfer function. However, these changes and modifications will not depart from the scope of this application.

[0113] In other embodiments of this application, a computer-readable storage medium is provided, including at least one processor 140 and at least one database 130; the at least one database 130 is used to store computer instructions, and the at least one processor 140 is used to execute at least a portion of the computer instructions to implement the method 200 described above.

[0114] In other embodiments of this application, a method for detecting the status of a bone conduction hearing device is also provided. Figure 9 This is an exemplary flowchart illustrating a method for detecting the state of a bone conduction hearing device according to some embodiments of this application. The bone conduction hearing device may include at least a microphone, a speaker, a feedback analysis unit, and a signal processing unit. In some embodiments, the microphone in this embodiment may include a bone conduction microphone, an air conduction microphone, etc., and these microphones are all detectors disclosed in other embodiments of this application. For example, they may be... Figure 4 and Figure 5The microphone shown is illustrated. The speaker in this embodiment is a bone conduction speaker, which may be the same as or different from the bone conduction speaker 122 in the previous embodiment, but both can be used to convert electrical signals into vibration signals. The microphone and bone conduction speaker are respectively installed at different locations on the bone conduction hearing device. For example, the microphone and speaker are respectively fixed at different locations on the housing of the bone conduction hearing device. In some embodiments, the feedback analysis unit and the signal processing unit can be two separate devices, or they can be components that perform two different functions in one device. For example, the feedback analysis unit and the signal processing unit can be combined into a state detection device. It is understood that the state detection device can be combined with the microphone and speaker to form an integrated device, or it can be a device independently set up from the microphone and speaker. To distinguish between the two setup methods, two application scenarios will be described below: For example, when the state monitoring device is combined with the microphone and speaker to form an integrated device, the bone conduction hearing device can perform state self-detection before or during use, detecting whether it is in a normal or abnormal state. Abnormal states include one or more of the following: incorrect wearing, abnormal bone conduction hearing device structure, foreign object intrusion, and foreign object obstruction. For example, when the status detection device is set up independently from the microphone and speaker mentioned above, the bone conduction hearing device can communicate and / or connect with the detection device before or during use to perform status detection on the bone conduction hearing device, detecting whether the bone conduction hearing device is in a normal or abnormal state. Abnormal states include one or more of the following: incorrect wearing, abnormal structure of the bone conduction hearing device, foreign object intrusion, and foreign object obstruction.

[0115] Methods for detecting the status of bone conduction hearing devices may include the following steps:

[0116] Step 910: The speaker generates a third sound based on the first signal. In some embodiments, the first signal may be similar to the first test tone signal or the second test tone signal described above, and will not be elaborated further here. In some embodiments, step 910 may be performed by the sound generation module 1010.

[0117] In some embodiments, a first signal (i.e., a test signal) can be generated by a signal processing unit, which can be transmitted to a loudspeaker, and the loudspeaker can convert the first signal into a third sound.

[0118] Step 920: The microphone receives the third sound and generates a feedback signal. In some embodiments, step 920 may be performed by the feedback signal generation module 1020.

[0119] The sound produced by the speaker is received by the microphone, which generates corresponding feedback information. In some embodiments, after receiving a third sound, the microphone can generate a feedback signal based on the third sound and send the feedback signal to the feedback analysis unit. In some embodiments, the microphone can generate the feedback signal in a similar or identical manner to the method used to generate the first feedback signal in the foregoing embodiments.

[0120] Step 930 involves the feedback analysis unit determining the feedback path transfer function from the speaker to the microphone of the bone conduction hearing device based on the microphone's feedback signal and the first signal. Step 930 can be executed by the feedback analysis module 1030.

[0121] In some embodiments, the method for determining the speaker-to-microphone feedback path transfer function of a bone conduction hearing device can be similar to... Figure 2 The method for determining the first feedback path transfer function F1(z) and / or the second feedback path transfer function F2(z) is the same. For illustrative purposes, the speaker-to-microphone feedback path transfer function F3(z) of the bone conduction hearing device can be determined by formula (9):

[0122]

[0123] Where Y3(z) represents the first transformed signal obtained by Z-transformation of the first signal input to the bone conduction hearing device, and X3(z) represents the feedback transformed signal obtained by Z-transformation of the feedback signal output by the microphone.

[0124] By performing Z-transform on the first signal and the feedback signal, the first transformed signal Y3(z) and the feedback transformed signal X3(z) can be obtained accordingly. Therefore, the feedback path transfer function from the speaker to the microphone of the bone conduction hearing device can be determined by formula (9).

[0125] Step 940: Obtain at least one preset feedback path transfer function. Step 940 can be executed by the feedback analysis module 1030.

[0126] The preset feedback path transfer function can be understood as a feedback path transfer function that is pre-set or pre-stored in a storage device (e.g., database 130). In some embodiments, the preset feedback path transfer function may include a feedback path transfer function determined according to the method disclosed in other embodiments of this application (e.g., step 240), such as a first feedback path transfer function. In some embodiments, the preset feedback path transfer function may also be a feedback path transfer function manually set by the operator based on experience. In some embodiments, at least one preset feedback path transfer function may include at least one of a standard feedback path transfer function or an abnormal feedback path transfer function. The standard feedback path transfer function may refer to the feedback path transfer function corresponding to the bone conduction hearing device in a normal state. For example, the standard feedback path transfer function may reflect the feedback path characteristic function of the bone conduction hearing device when worn by a large group of people, or it may be a personalized feedback path characteristic function of a specific user when worn and used normally. The abnormal feedback path transfer function may refer to the feedback path transfer function corresponding to the bone conduction hearing device in an abnormal state. Abnormal feedback path transfer functions include one or more of the following: incorrect wearing feedback path transfer function, abnormal bone conduction hearing device structure feedback path transfer function, foreign object intrusion feedback path transfer function, and foreign object obstruction feedback path transfer function. In some embodiments, the abnormal feedback path may include multiple possible abnormal feedback scenarios. In some embodiments, at least one preset feedback path transfer function may include a speaker-to-microphone feedback path transfer function for the bone conduction hearing device in different states. The different wearing states of the bone conduction hearing device may include a state when it is worn by a user (at which time the speaker or housing of the bone conduction hearing device is in contact with the user's face) and a state when it is not worn by a user (at which time the speaker or housing of the bone conduction hearing device is not in contact with the user's face). Accordingly, at least one preset feedback path transfer function may include a feedback path transfer function when the bone conduction hearing device is worn by a user (also referred to as the "first preset feedback path transfer function") and a feedback path transfer function when it is not worn by a user (also referred to as the "second preset feedback path transfer function").

[0127] Step 950: Compare the feedback path transfer function with at least one preset feedback path transfer function. Step 950 can be executed by the feedback analysis module 1030.

[0128] In some embodiments, the feedback path transfer function determined in step 930 can be compared with a preset feedback path transfer function to determine the state of the bone conduction hearing device. In some embodiments, it can be determined whether the difference between the feedback path transfer function and a standard feedback function in at least one preset feedback path transfer function is within a preset threshold range: if yes, the feedback path transfer function is determined to be normal; if no, the feedback path transfer function is determined to be abnormal. In other embodiments, it can also be determined whether the ratio of the feedback path transfer function to a standard feedback function in at least one preset feedback path transfer function is within a preset threshold range: if yes, the feedback path transfer function is determined to be normal; if no, the feedback path transfer function is determined to be abnormal. In some embodiments, it can be determined whether the difference between the feedback path transfer function and an abnormal feedback function in at least one preset feedback path transfer function is within a preset threshold range: if yes, the feedback path transfer function is determined to be abnormal; if no, the feedback path transfer function is determined to be normal. In other embodiments, it can also be determined whether the ratio of the feedback path transfer function to an abnormal feedback function in at least one preset feedback path transfer function is within a preset threshold range: if yes, the feedback path transfer function is determined to be abnormal; if no, the feedback path transfer function is determined to be normal. In some embodiments, the aforementioned preset threshold range can be set manually and adjusted according to different situations; this application does not impose any restrictions on this.

[0129] In some embodiments, if at least one preset feedback path transfer function includes at least two, then the preset feedback path transfer function with the smallest difference from the feedback path transfer function is determined as the preset feedback path transfer function. For example, if at least one preset feedback path transfer function includes a first preset feedback path transfer function and a second preset feedback path transfer function, and the difference between the first preset feedback path transfer function and the feedback path transfer function is greater than the difference between the second preset feedback path transfer function and the feedback path transfer function, then the second preset feedback path transfer function is determined as the preset feedback path transfer function.

[0130] In step 960, the signal processing unit determines the status of the bone conduction hearing device based on the comparison results. Step 960 can be executed by the signal processing module 1040.

[0131] In some embodiments, the comparison result may include whether the feedback path transfer function is normal or abnormal. In some embodiments, if the feedback path transfer function is normal, the bone conduction hearing device is determined to be in a normal state; if the feedback path transfer function is abnormal, the bone conduction hearing device is determined to be in an abnormal state. In some embodiments, the state of the bone conduction hearing device may include: a normal state and an abnormal state. An abnormal state includes one or more of the following: incorrect wearing, structural abnormality of the bone conduction hearing device, foreign object intrusion, and foreign object obstruction. The wearing state can be understood as the bone conduction hearing device being worn on the wearer's body; the not-wearing state can be understood as the bone conduction hearing device not being worn on the wearer's body; a normal structural state can refer to the structure and / or components of the bone conduction hearing device being in a normal working state, allowing the bone conduction hearing device to be used normally; a structural abnormal state is the opposite of a normal structural state, indicating that the structure and / or components of the bone conduction hearing device are not in a normal working state (e.g., due to collision causing misalignment, movement, or damage to components on the bone conduction hearing device); a foreign object intrusion state can refer to the entry of an object other than the structure and / or components of the bone conduction hearing device into the bone conduction hearing device. In some embodiments, a normal structural state can be classified as a normal state, and an abnormal structural state or a foreign object intrusion state can be classified as an abnormal state. In some other embodiments, the comparison results can reflect the wearing status of the bone conduction hearing device, for example, a wearing status or a non-wearing status.

[0132] In some embodiments, it can be achieved through Figure 2 The method described above determines the feedback path transfer function of the bone conduction hearing device under normal conditions (e.g., normal structural condition) and abnormal conditions (e.g., foreign object intrusion condition), and stores it in database 130 as preset feedback path transfer functions. In some embodiments, the feedback path transfer function corresponding to the bone conduction hearing device under abnormal conditions (e.g., foreign object intrusion condition) can be used as the abnormal feedback path transfer function, and the feedback path transfer function corresponding to the bone conduction hearing device under normal conditions (e.g., normal structural condition) can be used as the standard feedback path transfer function. In some embodiments, database 130 can store multiple preset feedback path transfer functions, and each preset feedback path transfer function corresponds to a state (normal state, abnormal state) of the bone conduction hearing device. According to steps 950 and 960, by comparing the current feedback path transfer function of the bone conduction hearing device with the preset feedback path transfer functions in database 130, the preset feedback path transfer function in database 130 that is closest to the current feedback path transfer function of the bone conduction hearing device can be matched. The state of the bone conduction hearing device corresponding to the matched preset feedback path transfer function is the current state of the bone conduction hearing device. Therefore, based on the process described above, the current status of the bone conduction hearing device can be determined in real time.

[0133] In some embodiments, the comparison result may include identifying different categories of preset feedback path transfer functions, thereby determining different states of the bone conduction hearing device. In some embodiments, the type of preset feedback path transfer function may include a standard feedback path transfer function and an abnormal feedback path transfer function; the abnormal feedback path transfer function includes one or more of the following: incorrect wearing feedback path transfer function, abnormal bone conduction hearing device structure feedback path transfer function, foreign object intrusion feedback path transfer function, and foreign object obstruction feedback path transfer function. Based on the type of preset feedback path transfer function within a preset threshold range, the type of the feedback path transfer function can be determined, thereby determining different states of the bone conduction hearing device. For example, if the determined type of the preset feedback path transfer function corresponds to a tight fit (i.e., the bone conduction hearing device fits the user tightly), then the type of the feedback path transfer function also corresponds to a tight fit, correspondingly reflecting a tight fit between the bone conduction hearing device and the user. Conversely, if the determined type of the preset feedback path transfer function corresponds to a loose fit, then the type of the feedback path transfer function also corresponds to a loose fit, correspondingly reflecting a loose fit between the bone conduction hearing device and the user. For example, different preset feedback path transfer functions correspond to different head parts where bone conduction hearing devices are worn. If the type of the preset feedback path transfer function is determined to correspond to a certain head part (e.g., mastoid process, temporal bone, or forehead), then the type of feedback path transfer function also corresponds to that head part, and accordingly, it can reflect the position of the bone conduction hearing device worn by the user on the head (e.g., mastoid process, temporal bone, or forehead).

[0134] In some embodiments, after determining the state of the bone conduction hearing device, the signal processing module 1040 can adaptively adjust the parameters of the bone conduction hearing device according to the aforementioned state. In some embodiments, after determining the state of the bone conduction hearing device, the signal processing module 1040 can also send a reminder message to the user according to the aforementioned state. In some embodiments, if the state of the bone conduction hearing device is abnormal, the user is reminded to adjust the state of the bone conduction hearing device. In some embodiments, the methods of reminding the user may include, but are not limited to, voice prompts, indicator light prompts, vibration prompts, text prompts, remote messages, etc. Specifically, voice prompts may be voice information emitted by the bone conduction hearing device, such as "Foreign object intrusion in the device". Indicator light prompts may refer to the presence of an indicator light on the bone conduction hearing device, which displays a green light when the bone conduction hearing device is in normal condition and a red light when the bone conduction hearing device is in abnormal condition, thereby reminding the wearer. Vibration prompts may refer to the bone conduction hearing device vibrating when the state of the bone conduction hearing device is abnormal; for example, three vibrations indicate a structural abnormality; continuous vibration indicates foreign object intrusion. Text prompts can refer to text messages displayed on bone conduction hearing devices or terminals that communicate with and / or connect to bone conduction hearing devices to remind users, such as "Foreign object in the device" or "Structural abnormality in the device".

[0135] It should be noted that the above description is provided for illustrative purposes only and is not intended to limit the scope of this application. Various changes and modifications can be made by those skilled in the art based on the guidance of this application. Features, structures, methods, and other features of the exemplary embodiments described in this application can be combined in various ways to obtain other and / or alternative exemplary embodiments. For example, the states of a bone conduction hearing device include various aspects, but which states are normal and which are abnormal can be set by the operator based on experience, by the user, or by the signal processing module 1040. However, these changes and modifications will not depart from the scope of this application.

[0136] Figure 10 This is an exemplary block diagram of a system for detecting the status of a bone conduction hearing device according to some embodiments of this application. The bone conduction hearing device status detection system 1000 may be simply referred to as System 1000. For example... Figure 10 As shown, in some embodiments, system 1000 includes a sound generation module 1010, a feedback signal generation module 1020, a feedback analysis module 1030, and a signal processing module 1040.

[0137] The sound generation module 1010 can be used to generate a third sound based on a first signal; wherein the first signal is generated by a signal processing unit. In some embodiments, the sound generation module 1010 may be a bone conduction speaker, or part of a bone conduction speaker. For more information on generating a third sound based on a first signal, please refer to [link to relevant documentation]. Figure 9 The detailed descriptions in the text are omitted here.

[0138] The feedback signal generation module 1020 can be used to receive a third sound and generate a feedback signal. In some embodiments, the feedback signal generation module 1020 can be a microphone, or part of a microphone, or any acoustic-electric sensor or vibration sensor. For more information on generating feedback signals, please refer to [link to relevant documentation]. Figure 9 The detailed descriptions in the text are omitted here.

[0139] The feedback analysis module 1030 can be used to determine the speaker-to-microphone feedback path transfer function of the bone conduction hearing device based on the feedback signal and the first signal; the feedback analysis module can also be used to obtain at least one preset feedback path transfer function; furthermore, the feedback analysis module can also be used to compare the feedback path transfer function with at least one preset feedback path transfer function. For more information on determining the feedback path transfer function, comparing the feedback path transfer function, and at least one preset feedback path transfer function, please refer to [link to relevant documentation]. Figure 9 The detailed descriptions in the text are omitted here.

[0140] The signal processing module 1040 can be used to determine the status of the bone conduction hearing device based on the comparison results. For more information on determining the status of a bone conduction hearing device, please refer to [link to relevant documentation]. Figure 9 The detailed descriptions in the text are omitted here.

[0141] In some other embodiments of this application, a computer-readable storage medium is also provided, which stores computer instructions. When a computer reads the computer instructions in the storage medium, the computer executes: generating a third sound based on a first signal; wherein the first signal may be a test signal generated by the computer; receiving the third sound and generating a feedback signal; determining the feedback path transfer function from the speaker to the microphone of the bone conduction hearing device based on the feedback signal and the first signal; obtaining at least one preset feedback path transfer function; comparing the feedback path transfer function and the at least one preset feedback path transfer function; and determining the state of the bone conduction hearing device according to the comparison result.

[0142] It should be noted that the above description of the system and its devices / modules is for convenience only and should not limit this application to the scope of the embodiments described. It is understood that those skilled in the art, after understanding the principle of the system, may arbitrarily combine the various devices / modules, or construct subsystems and connect them with other devices / modules, without departing from this principle. For example, Figure 10 The feedback analysis module 1030 and signal processing module 1040 disclosed herein can be different modules within a single device (e.g., processor 140), or a single module can implement the functions of two or more of the aforementioned modules. For example, the feedback analysis module 1030 and signal processing module 1040 can be two separate modules, or a single module can simultaneously perform the functions of analyzing and processing signals. Furthermore, each module can have its own storage module. Yet another example is that the modules can share a single storage module. All such variations are within the scope of protection of this application.

[0143] The beneficial effects that the embodiments of this application may bring include, but are not limited to: (1) the vibration transfer function of the bone conduction loudspeaker can be measured without the use of external devices such as accelerometers, making the testing process simpler and more convenient; (2) the current status of the bone conduction hearing device can be detected according to the feedback path transfer function, and corresponding reminders can be sent to the user according to the status of the bone conduction hearing device, so that the user knows or adjusts the status of the bone conduction hearing device, thereby improving the user experience. It should be noted that different embodiments may produce different beneficial effects. In different embodiments, the beneficial effects that may be produced can be any one or a combination of the above, or any other possible beneficial effects.

[0144] 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 application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0145] Meanwhile, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic related to at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this application do not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0146] 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 application are not intended to limit the order of the processes and methods of this application. Although the foregoing disclosure has discussed some currently considered useful embodiments of the invention through various examples, 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 substance and scope of the embodiments of this application. For example, while the system components described above can be implemented using hardware devices, they can also be implemented solely through software solutions, such as installing the described system on existing servers or mobile devices.

[0147] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments of the invention, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0148] Finally, it should be understood that the embodiments described in this application are merely illustrative of the principles of the embodiments of this application. Other modifications may also fall within the scope of this application. Therefore, alternative configurations of the embodiments of this application are considered as examples and not limitations, and are regarded as consistent with the teachings of this application. Accordingly, the embodiments of this application are not limited to the embodiments explicitly described and illustrated in this application.

Claims

1. A system for detecting the status of a bone conduction hearing device, characterized in that, The bone conduction hearing device includes a housing and a bone conduction speaker fixed to the housing, the bone conduction speaker driving the housing to vibrate; The system is used to determine the vibration transfer function from the bone conduction loudspeaker to a first position, and the system includes a microphone, wherein... When the microphone is positioned in the first position, it is rigidly or elastically connected to the housing, and the vibration direction of the microphone diaphragm is parallel to the vibration direction of the housing. It is used to receive sound generated by the bone conduction speaker and transmitted to the microphone through both vibration and air conduction. When the microphone is positioned in the second position, which is less than or equal to 5 cm from the first position, it is not in contact with the housing and is used to receive sound generated by the bone conduction speaker and transmitted only through air conduction. Alternatively, the microphone is positioned in a first position and is rigidly or elastically connected to the housing. The microphone has a first orientation and a second orientation. The first orientation is defined as the vibration direction of the microphone diaphragm being parallel to the vibration direction of the housing, and the second orientation is defined as the vibration direction of the microphone diaphragm being perpendicular to the vibration direction of the housing. The microphone is used to receive sound generated by the bone conduction speaker and transmitted to the microphone simultaneously through vibration conduction and air conduction in the first orientation, and to receive sound generated by the bone conduction speaker and transmitted only through air conduction in the second orientation.

2. The system according to claim 1, characterized in that, The system includes: A test signal generation unit is configured to generate a first test tone signal and a second test tone signal; wherein the bone conduction speaker generates a first sound based on the received first test tone signal and generates a second sound based on the received second test tone signal; When the microphone is set in the first position, and the microphone is rigidly or elastically connected to the housing, and the vibration direction of the microphone diaphragm is parallel to the vibration direction of the housing, the microphone receives the first sound and outputs a first feedback signal. When the microphone is set in the second position at a distance of less than or equal to 5 cm from the first position, and the microphone is not in contact with the housing, the microphone receives the second sound and outputs a second feedback signal. Alternatively, when the microphone is positioned in the first position, the microphone is rigidly or elastically connected to the housing, and the vibration direction of the microphone diaphragm is parallel to the vibration direction of the housing, the microphone outputs a first feedback signal after receiving the first sound; when the microphone is positioned in the first position, the microphone is rigidly or elastically connected to the housing, and the vibration direction of the microphone diaphragm is perpendicular to the vibration direction of the housing, the microphone outputs a second feedback signal after receiving the second sound. The feedback path calculation unit is configured to determine the feedback path transfer function from the bone conduction speaker to the first position based on the first test tone signal, the second test tone signal, the first feedback signal, and the second feedback signal, wherein the feedback path transfer function is the vibration transmission signal; wherein the first feedback signal includes a signal transmitted from the bone conduction speaker to the microphone through a vibration transmission path and an air conduction transmission path, and the second feedback signal includes a signal transmitted from the bone conduction speaker to the microphone through an air conduction transmission path.

3. The system according to claim 2, characterized in that, The bone conduction hearing device includes a feedback analysis unit and a signal processing unit, wherein the feedback analysis unit is connected to both the feedback path calculation unit and the signal processing unit. The feedback analysis unit is configured to acquire at least one preset feedback path transfer function; and compare the feedback path transfer function with the at least one preset feedback path transfer function. The signal processing unit is configured to determine the state of the bone conduction hearing device based on the comparison results.

4. The system according to claim 3, characterized in that, The at least one preset feedback path transfer function includes a standard feedback path transfer function and an abnormal feedback path transfer function; the abnormal feedback path transfer function includes one or more of the following four functions: incorrect wearing feedback path transfer function, bone conduction hearing device structural abnormality feedback path transfer function, foreign object intrusion feedback path transfer function, and foreign object obstruction feedback path transfer function. The comparison of the feedback path transfer function and the at least one preset feedback path transfer function includes: Determine at least one preset feedback path transfer function that is within a preset threshold range of the feedback path transfer function; The type of the feedback path transfer function is determined based on the type of the at least one preset feedback path transfer function.

5. The system according to claim 4, characterized in that, Determining the type of the feedback path transfer function based on the type of the at least one preset feedback path transfer function includes: If the type of the at least one preset feedback path transfer function is a standard feedback path transfer function, then the type of the feedback path transfer function is determined to be normal; or If the type of the at least one preset feedback path transfer function is an abnormal feedback path transfer function, then the abnormal type of the feedback path transfer function is determined; further including: If the type of the at least one preset feedback path transfer function is an incorrect wearing feedback path transfer function, then the type of the feedback path transfer function is determined to be incorrect wearing; or If the type of the at least one preset feedback path transfer function is a bone conduction hearing device structural abnormality feedback path transfer function, then the type of the feedback path transfer function is determined to be bone conduction hearing device structural abnormality; or If the type of the at least one preset feedback path transfer function is a foreign object intrusion feedback path transfer function, then the type of the feedback path transfer function is determined to be foreign object intrusion; or If the type of the at least one preset feedback path transfer function is a foreign object occlusion feedback path transfer function, then the type of the feedback path transfer function is determined to be foreign object occlusion.

6. The system according to claim 4, characterized in that, The at least one preset feedback path transfer function that determines the feedback path transfer function within a preset threshold range includes: If the at least one preset feedback path transfer function includes at least two, then the preset feedback path transfer function with the smallest difference is determined as the preset feedback path transfer function.

7. The system according to claim 5, characterized in that, Determining the status of the bone conduction hearing device based on the comparison results includes: If the type of the feedback path transfer function is normal, then the bone conduction hearing device is determined to be in normal condition; or If the type of the feedback path transfer function is abnormal, then the state of the bone conduction hearing device is determined to be abnormal; further including determining the abnormality type of the bone conduction hearing device: If the type of the feedback path transfer function is "incorrect wearing", then the state of the bone conduction hearing device is determined to be "incorrect wearing"; or If the type of the feedback path transfer function is bone conduction hearing device structural abnormality, then the state of the bone conduction hearing device is determined to be structural abnormality; or If the type of the feedback path transfer function is foreign body intrusion, then the state of the bone conduction hearing device is determined to be foreign body intrusion; or If the type of the feedback path transfer function is foreign object obstruction, then the state of the bone conduction hearing device is determined to be foreign object obstruction.

8. The system according to claim 7, characterized in that, The signal processing unit is configured to: Based on the status of the bone conduction hearing device, the parameters of the bone conduction hearing device can be adaptively adjusted or a reminder message can be sent to the user.

9. The system according to claim 2, characterized in that, The bone conduction hearing device has two states: normal and abnormal. The abnormal state includes one or more of the following: incorrect wearing, abnormal structure of the bone conduction hearing device, foreign object intrusion, and foreign object obstruction.

10. The system according to claim 1, characterized in that, The first position is another position that is close to the housing and different from the position of the bone conduction speaker.

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