RU2803486C1 - Systems and methods for determining the state of hearing aid with bone conduction - Google Patents

Abstract

FIELD: acoustics.

SUBSTANCE: methods for determining the transfer functions of hearing aids and their diagnostics. The method for determining the state of a hearing aid with bone conduction consists of the stage of emitting sound through the loudspeaker, receiving sound by the microphone, generating a feedback signal. By means of the feedback analysis module, the transfer function of the feedback path from the loudspeaker to the microphone is determined based on the feedback signal and the first signal; receiving at least one predefined transfer function of the feedback path; and comparing the feedback path transfer function with at least one predefined feedback path transfer function; and determining, by means of the signal processing unit, a state of the bone conduction hearing aid based on comparison result. At the stage of determining the state of the bone conduction hearing aid based on the comparison result: if the feedback path transfer function is a normal feedback path transfer function, it is determined that the state of the bone conduction hearing aid is normal; or if the feedback path transfer function is abnormal, it is determined that the state of the bone conduction hearing aid is abnormal. The hearing aid consists of a microphone, a loudspeaker, a feedback analysis module and a signal processing module.

EFFECT: increased accuracy of hearing aid diagnostics.

9 cl, 10 dwg

Description

Field of technology to which the invention relates

The present invention relates generally to the field of hearing devices and in particular to systems and methods for determining the status of a bone conduction hearing device.

State of the art

A hearing device (such as a hearing aid) typically contains both a microphone and a speaker. The condition of a hearing device can have a major impact on the use of that hearing device. An abnormal condition of a hearing device may cause a significant reduction in the output sensitivity of that hearing device, or may directly result in malfunction of such hearing device (for example, a "roaring ambience" effect may occur). Therefore, determining the condition of a hearing device is very important to ensure normal use of the hearing device and reduce the harm that may be caused by a hearing device in an abnormal condition. In a bone conduction hearing device (such as a bone conduction hearing aid), an important indicator reflecting the condition of the hearing device is the feedback path transfer function. In some scenarios, the real-time status of a bone conduction hearing device can be intuitively reflected by determining and estimating the feedback path transfer function of the bone conduction hearing device.

Disclosure of the invention

One embodiment of the present invention provides a method for determining the status of a bone conduction hearing device, wherein the bone conduction hearing device comprises at least a microphone, a loudspeaker, a feedback analysis module, and a signal processing module. The method comprises the steps of: generating, by means of a loudspeaker, a third sound based on the first signal, the first signal being generated by a signal processing module; the third sound is received via a microphone and a feedback signal is generated; through the feedback analysis module, determine the transfer function of the feedback path from the loudspeaker to the microphone based on the feedback signal and the first signal, obtain at least one predetermined transfer function of the feedback path, and compare the transfer function of the feedback path with the specified at least one a predetermined transfer function of the feedback path; and determining, by the signal processing module, the state of the bone conduction hearing device based on the comparison result.

In some embodiments, the at least one predefined feedback path transfer function comprises a standard feedback path transfer function and an anomalous feedback path transfer function, the anomalous feedback path transfer function being one or more functions of an incorrect feedback path transfer function. wearing, the transfer function of the feedback path when the structure is abnormal, the transfer function of the feedback path when a foreign body penetrates, and the transfer function of the feedback path when blocked by a foreign body. In the step of comparing the feedback path transfer function with the at least one predetermined feedback path transfer function, at least one predetermined feedback path transfer function is determined that is within a predetermined threshold range relative to the feedback path transfer function; and determining a type of feedback path transfer function based on the type of the at least one found predetermined feedback path transfer function.

In some embodiments, in the step of determining a feedback path transfer function type based on the type of the at least one found predefined feedback path transfer function, if the type of the at least one found predefined feedback path transfer function is a standard feedback path transfer function communication, determine that the transfer function of the feedback path is a normal transfer function of the feedback path; or if the type of the at least one found predetermined feedback path transfer function is an anomalous feedback path transfer function, determining that the feedback path transfer function is an anomalous feedback path transfer function; wherein the method further comprises the steps of: if the type of the at least one found predetermined feedback path transfer function is an incorrectly worn feedback path transfer function, determining that the feedback path transfer function is a feedback path transfer function if worn incorrectly; or if the type of the at least one found predetermined feedback path transfer function is an abnormal structure feedback path transfer function, determining that the feedback path transfer function is an abnormal structure feedback path transfer function; or if the type of the at least one found predetermined feedback path transfer function is a foreign body penetration feedback path transfer function, determining that the feedback path transfer function is a foreign body penetration feedback path transfer function; or if the type of the at least one found predetermined feedback path transfer function is a feedback path transfer function when blocked by a foreign body, the feedback path transfer function is determined to be a feedback path transfer function when blocked by a foreign body.

In some embodiments, during the step of determining at least one predetermined feedback path transfer function within a predetermined threshold range relative to the feedback path transfer function, if the number of transfer functions of the at least one found predetermined feedback path transfer function is two or more than two, determine the predetermined feedback path transfer function with the smallest difference in the quality of the found predetermined feedback path transfer function.

In some embodiments, in the step of determining the state of the bone conduction hearing device, based on the comparison result, if the feedback path transfer function is a normal feedback path transfer function, it is determined that the state of the bone conduction hearing device is normal; or if the feedback path transfer function is an abnormal feedback path transfer function, determining that the state of the bone conduction hearing device is abnormal, the method further comprising the steps of determining the abnormal type of the bone conduction hearing device by: if the transfer function the feedback path represents the transfer function of the feedback path when worn incorrectly, it is determined that the bone conduction hearing device is in a state of incorrect wearing; or if the feedback path transfer function is a feedback path transfer function under an abnormal structure, determining that the bone conduction hearing device is in a state with an abnormal structure; or if the feedback path transfer function is the foreign body penetration feedback path transfer function, determining that the bone conduction hearing device is in a foreign body penetration state; or if the feedback path transfer function is the feedback path transfer function when blocked by a foreign body, it is determined that the bone conduction hearing device is in a foreign body blocked state.

In some embodiments, the method further comprises: adaptively adjusting one or more parameters of the bone conduction hearing device, or transmitting reminder information to the user based on the state of the bone conduction hearing device.

In some embodiments, the state of the bone conduction hearing device comprises a normal state and an abnormal state; and the abnormal condition comprises one or more of an improperly worn condition, an abnormal structure condition, a foreign body penetration condition, and a foreign body blocking condition.

One embodiment of the present invention provides a system for determining the status of a bone conduction hearing device, the bone conduction hearing device includes at least a microphone, a loudspeaker, a feedback analysis module, and a signal processing module, and the system includes: a loudspeaker configured to generate a third sound based on the first signal generated by the signal processing module; a microphone configured to receive a third sound and generate a feedback signal; a feedback analysis module configured to determine the transfer function of the feedback path from the loudspeaker to the microphone based on the feedback signal and the first signal, obtain at least one predetermined transfer function of the feedback path, and compare the transfer function of the feedback path with the specified one. at least one predefined feedback path transfer function; and a signal processing module configured to determine the state of the bone conduction hearing device based on the comparison result.

In some embodiments, the at least one predefined feedback path transfer function comprises a standard feedback path transfer function and an anomalous feedback path transfer function, the anomalous feedback path transfer function comprises one or more of an improperly worn feedback path transfer function, the transfer function of the feedback path when the structure is abnormal, the transfer function of the feedback path when a foreign body penetrates, and the transfer function of the feedback path when blocked by a foreign body; a procedure for comparing a subject feedback path transfer function with said at least one predetermined feedback path transfer function comprises determining at least one predetermined feedback path transfer function within a predetermined threshold range relative to the feedback path transfer function; and determining a type of feedback path transfer function based on the type of the at least one predetermined feedback path transfer function.

In some embodiments, the procedure for determining the type of the feedback path transfer function under consideration based on the type of the at least one found predefined feedback path transfer function comprises: if the type of the at least one found predefined feedback path transfer function is a standard path transfer function feedback, determining that the feedback path transfer function is a normal feedback path transfer function; or if the type of the at least one found predetermined feedback path transfer function is an anomalous feedback path transfer function, determining that the feedback path transfer function is an anomalous feedback path transfer function; and the procedure for determining the type of the feedback path transfer function further comprises: if the type of the at least one found predetermined feedback path transfer function is a mal-wearing feedback path transfer function, determining that the feedback path transfer function is a path transfer function feedback when worn incorrectly; or if the type of the at least one found predetermined feedback path transfer function is an abnormal structure feedback path transfer function, determining that the feedback path transfer function is an abnormal structure feedback path transfer function; or if the type of the at least one found predetermined feedback path transfer function is a foreign body penetration feedback path transfer function, determining that the feedback path transfer function is a foreign body penetration feedback path transfer function; or if the type of the at least one found predefined feedback path transfer function is a foreign body blocking feedback path transfer function, determining that the feedback path transfer function is a foreign body blocking feedback path transfer function.

In some embodiments, a procedure for determining at least one predetermined feedback path transfer function within a predetermined threshold range relative to a considered feedback path transfer function comprises: if the number of transfer functions in the at least one found predetermined feedback path transfer function is equal to two or more than two, determining the predetermined feedback path transfer function with the smallest difference as one found predetermined feedback path transfer function.

In some embodiments, the procedure for determining the state of the bone conduction hearing device based on the comparison result comprises: if the feedback path transfer function is a normal feedback path transfer function, determining that the state of the bone conduction hearing device is normal; or if the feedback path transfer function is an abnormal feedback path transfer function, determining that the state of the bone conduction hearing device is abnormal; and the system further comprises determining that the bone conduction hearing device is an abnormal type by: if the feedback path transfer function is an abnormally worn feedback path transfer function, determining that the bone conduction hearing device is in an abnormally worn state; or if the feedback path transfer function is a feedback path transfer function under an abnormal structure, determining that the bone conduction hearing device is in a state with an abnormal structure; or if the feedback path transfer function is a foreign body penetration feedback path transfer function, determining that the bone conduction hearing device is in a foreign body penetration state; or if the feedback path transfer function is a feedback path transfer function when blocked by a foreign body, determining that the bone conduction hearing device is in a foreign body blocked state.

In some embodiments, the signal processing module is configured to adaptively adjust one or more parameters of the bone conduction hearing device or provide reminder information to the user based on the condition of the bone conduction hearing device.

In some embodiments, the state of the bone conduction hearing device comprises a normal state and an abnormal state; and the abnormal state comprises one or more of an improperly worn state, an abnormal structure state, a foreign body penetration state, and a foreign body blocking state.

One embodiment of the present invention provides a system for determining the status of a bone conduction hearing device, the system comprising a sound generation module, a feedback signal generation module, a feedback analysis module, and a signal processing module. The sound generation module is configured to generate a third sound based on the first signal, the first signal being generated by the signal processing module. The feedback signal generation module is configured to receive the third sound and generate a feedback signal. The feedback analysis module is configured to determine the transfer function of the feedback path from the loudspeaker to the microphone based on the feedback signal and the first signal, obtain at least one predetermined transfer function of the feedback path, and compare the transfer function of the feedback path and the specified at least one predefined transfer function of the feedback path. The signal processing module is configured to determine the state of the bone conduction hearing device based on the comparison result.

One embodiment of the present invention provides a computer-readable information storage medium, wherein the information storage medium stores computer instructions such that when a computer reads computer instructions from the information storage medium, the computer is configured to: generate a third sound based on the first signal, the first the signal is a test signal generated by a computer; receives the third sound and generates a feedback signal; determines the transfer function of the feedback path from the loudspeaker to the microphone of the bone conduction hearing device based on the feedback signal and the first signal; receives at least one predetermined feedback path transfer function; compares the feedback path transfer function and the at least one predefined feedback path transfer function; and determines the status of the bone conduction hearing device based on the comparison result.

Brief description of drawings

The present application will be further discussed in the form of exemplary embodiments, which will be described in detail by means of the accompanying drawings. These options are not limiting. In these embodiments, the same numeric designators represent the same structures, where:

fig. 1 is a simplified diagram of an application scenario for a transfer function determination system in accordance with some embodiments of the present invention;

fig. 2 is an example of a logic diagram of a procedure for obtaining a vibration transfer function in accordance with some embodiments of the present invention;

fig. 3 is an example of a module diagram of a system for obtaining a vibration transfer function in accordance with some embodiments of the present invention;

fig. 4 is a simplified diagram of a system for determining a transfer function when at least one detector is in a first position, according to some embodiments of the present invention;

fig. 5 is a simplified diagram of a system for determining a transfer function when at least one detector is in a second position, according to some embodiments of the present invention;

fig. 6 is a graph of a first feedback path transfer function in accordance with some embodiments of the present invention;

fig. 7 is a graph of a second feedback path transfer function in accordance with some embodiments of the present invention;

fig. 8 is a graph of a vibration transfer function in accordance with some embodiments of the present invention;

fig. 9 is an example flow diagram of a procedure for determining the status of a bone conduction hearing device in accordance with some embodiments of the present invention; And

fig. 10 is an example of a module diagram of a system for determining the status of a bone conduction hearing device in accordance with some embodiments of the present invention.

Carrying out the invention

In order to more clearly explain the technical outline of the embodiments of the present invention, drawings to be used in describing the embodiments will be briefly introduced in the following. It will be appreciated that the drawings in the following description represent only some examples or variations of the present invention. For those skilled in the art, the present invention can also be applied to other similar scenarios in accordance with the drawings herein without much creative effort. Unless it is obvious from the language or stated otherwise, like symbols in the drawings represent the same structure or operation.

It should be understood that the terms "system", "device", "block" and/or "module" are used herein as a way to distinguish various components, elements, parts or assemblies at different levels from one another. However, if different words serve the same purpose, they can be replaced by other expressions.

As shown in the specification and claims, the words “one” and/or “that” do not specifically refer to the singular number, but may also include the plural number unless the context clearly indicates otherwise. Generally speaking, the terms “includes” and “comprises” indicate only steps and elements that have been clearly identified and included, and these steps and elements do not constitute an exclusive list. The methods or equipment may also contain other steps or elements.

In the present invention, logic diagrams are used to explain operations performed by a system according to a corresponding embodiment of the present invention. It should be understood that the preceding or subsequent operations are not necessarily performed in an exact sequence. Instead, you can complete the steps in reverse order or simultaneously. At the same time, you can add other operations to these procedures or exclude one or more operations from these procedures.

For convenience of explanation, the following describes a procedure for using and applying the sound generation unit, taking a bone conduction speaker or a conventional speaker as examples. It should be noted that the above description is for illustrative purposes only and is not intended to limit the scope of the present invention.

In the following, without loss of generality, when describing technology related to bone conduction, the present invention will use the terms “bone conduction hearing device,” “bone conduction loudspeaker,” “loudspeaker device,” or “bone conduction earphone.” . These descriptions are only examples of applications of bone conduction technologies. Ordinary technicians in the field may also replace the terms "loudspeaker" or "earphone" with other similar words such as "player", "hearing aid", etc. In fact, various methods of implementing the present invention can be applied to other non-speaker hearing aids. For example, those skilled in the art, after understanding the basic principles of bone conduction loudspeakers, will be able to make various modifications and changes in the forms and details of the various methods and steps of implementing a bone conduction loudspeaker without deviating from these principles. In particular, the function of receiving and processing ambient sounds can be added to a bone conduction loudspeaker so that the loudspeaker performs the function of a hearing aid. For example, microphone-type devices, such as microphones, can sense sounds from the user/wearer's environment, process those sounds using some algorithm(s), and transmit the processed sounds (or generated electrical signal) to a bone conduction speaker. In other words, the bone conduction speaker can be modified to add the function of sensing ambient sounds, so that after some signal processing, these sounds can be transmitted to the user/wearer through the bone conduction speaker to realize the function of a bone conduction hearing aid. For example, the algorithm(s) mentioned here may perform any one function or combination of functions from the following list - noise reduction, automatic gain control, acoustic feedback suppression, wide dynamic range compression, active environment sensing, active anti-noise processing, directional processing, tinnitus reduction processing, multi-channel wide dynamic range compression, active ambience reduction, volume control, etc.

In some embodiments, a hearing device (eg, a hearing aid) typically may have both a microphone and a speaker. Some of the sound emitted by the loudspeaker may be picked up by the microphone, resulting in a "roaring ambience" effect, or resulting in the user (eg, wearer) hearing an echo while using the hearing device. To suppress this echo or ambience roar effect, it is necessary to minimize the influence of the loudspeaker on the microphone (for example, to exclude the sound emitted by the loudspeaker from the signal received by the microphone). Typically, the effect of a loudspeaker on a microphone can be expressed by the transfer function of the feedback path between the loudspeaker and the microphone. In some embodiments, in a bone conduction hearing device (eg, a bone conduction hearing aid), the sound generated by the bone conduction speaker may have an undesirable effect on the microphone by transmitting vibrations and air conduction at the same time. Therefore, the paths for transmitting feedback signals from the bone conduction loudspeaker to the microphone are both paths - the air conduction transmission path and the vibration transmission path. These two transmission paths correspond to two different transfer functions from bone conduction loudspeakers to microphones. In some scenarios, it is necessary to better evaluate the impact of the bone conduction loudspeaker on the microphone through different transmission paths, especially the vibration transmission path. Measuring the vibration transfer function usually requires the use of additional devices such as an acceleration sensor, which is more complex.

Therefore, some embodiments of the present invention provide a method of obtaining a vibration transfer function from a bone conduction speaker to other positions (eg, to a position where a microphone coupled to the bone conduction speaker through a housing is located). One or more detectors receive a first sound at a first position and a second sound at a second position. The first sound can be transmitted through an air conduction transmission path and a vibration transmission path. The second sound can only be transmitted through an air-conducted transmission path. In this way, the vibration transfer function is determined, and this testing method is more effective and easier to implement.

In fig. 1 is a simplified diagram of an application scenario for a transfer function determination system in accordance with some embodiments of the present invention. For convenience of description, the transfer function determination system 100 may be briefly referred to as the system 100. The system 100 may include at least one detector 110, a hearing device 120, a data base 130, and a processor 140. The various components in the system 100 may be connected by some means of communication. and/or connecting means, including wireless (radio) connections, wired connections or any combination of such connections, allowing for the transmission and/or reception of data. In some embodiments, system 100 may be used to obtain the vibration transfer function of a bone conduction hearing device and determine the condition of the bone conduction hearing device.

In some embodiments, wired connections may be made using, for example, a metal cable, an optical cable, or a mixed metal and optical cable, such as coaxial cable, communication cable, flexible cable, coiled cable, non-metallic sheathed cable, metal sheathed cable, multicore cable, twisted pair cable, ribbon cable, shielded cable, telecommunications cable, parallel twisted pair conductor and twisted pair.

The examples discussed above are provided for convenience of explanation only. Wired connections may be implemented using some other type of transmission line, such as a medium for carrying electrical signals or optical signals. Wireless connections may be, but are not limited to, radio communication connections, free space optical communication connections, acoustic communication connections, electromagnetic induction connections, and the like. Radio communications may be implemented in accordance with, but not limited to, IEEE302.11 family of standards, IEEE 302.15 family of standards (eg, Bluetooth technology and Purple Bee technology), first generation mobile communications technology, second generation mobile communications technology (eg, FDMA , TDMA, SDMA, CDMA and SSMA), public packet radio technology, third generation mobile technology (e.g. CDMA2000, WCDMA, TD-SCDMA and WiMAX), fourth generation mobile technology (e.g. TD-LTE and FDD-LTE ), satellite communications technology (e.g., GPS technology), near field communication (NFC) technology, and other technologies operating in the industrial, scientific and medical (ISM) frequency range (e.g., 2.4 GHz). Free space optical communications can use, without limitation, visible light, infrared signals, etc. Acoustic communication may use, but is not limited to, sound waves, ultrasonic signals, and the like. Electromagnetic induction may include, but is not limited to, near field communication technology. The examples described above are provided for convenience only. Wireless (radio) communications may also be of other types, such as Z-wave technology, other paid civilian radio bands, and military radio bands.

In some embodiments, hearing device 120 may generally include an air conduction speaker and a bone conduction speaker. In some embodiments, hearing device 120 may include a bone conduction speaker (e.g., bone conduction speaker 122, as shown in FIG. 4 and FIG. 5) and a housing 121. Bone conduction speaker 122 and other components (e.g., a microphone) may be mounted in the housing 121. To suppress the influence of the bone conduction speaker 122 on the microphone, it may be necessary to determine the vibration transfer function from the bone conduction speaker 122 to some position of interest in the hearing device 120 (for example, position 123, as shown in FIG. 1 and Fig. 4). It should be understood that the specified position of interest may be a position where a microphone is located (for example, a microphone actually installed in the hearing aid 120), or some position inside or outside the hearing aid 120 (for example, the position of some part of the hearing aid 120). device 120, which is rigidly or elastically connected to the bone conduction microphone).

In some embodiments, at least one detector 110 may receive sound emitted by bone conduction speaker 122 and then generate a feedback signal based on that sound. The feedback signal may reflect the influence of the bone conduction speaker 122 on the at least one detector 110 (or on the location where the at least one detector 110 is located). For example, the feedback signal may be provided to a processor 140, and then the processor 140 may determine the transfer function of the feedback path from the bone conduction speaker 122 to the at least one detector 110 based on the feedback signal. In some embodiments, at least one detector 110 may receive ambient sound and generate an audio signal based on that sound. Ambient sound may include, for example, human voice, vehicle sounds, ambient noise, and the like. In some embodiments, at least one detector 110 may provide an audio signal to the bone conduction speaker 122 and the processor 140, and the bone conduction speaker 122 may generate sound based on the audio signal. In some embodiments, at least one detector 110 may provide an audio signal to a processor 140, the processor 140 may then provide the audio signal to a bone conduction speaker 122, and the bone conduction speaker 122 may generate sound based on the audio signal. In some embodiments, at least one detector 110 may include an acoustoelectric transducer, such as a microphone. For example, the microphone may be a ribbon microphone, a micro electro mechanical system (MEMS) microphone, a dynamic microphone, a piezoelectric microphone, a capacitive microphone, a carbon microphone, an analog microphone, a digital microphone, and the like. or any combination of the microphones listed. As another example, the microphone may be an omnidirectional microphone, a unidirectional microphone, a bidirectional microphone, a cardioid microphone, or the like, or any combination thereof. In some embodiments, at least one detector 110 may include an air conduction microphone and a bone conduction microphone. For convenience of description, the present invention describes the microphone as a detector 110.

Processor 140 may process data and/or information received from at least one detector 110, bone conduction speaker 122, database 130, or other components of system 100. For example, processor 140 may process an electrical signal generated after the microphone will receive the sound emitted by the bone conduction speaker 122, and thus determine the transfer function of the feedback path from the bone conduction speaker 122 to the microphone. In some embodiments, processor 140 may be a single server or a group of servers. A group of servers can be centralized or distributed. In some embodiments, processor 140 may be local or remote. For example, processor 140 may receive information and/or data from detector 110, bone conduction speaker 122, and/or database 130. As another example, processor 140 may be directly coupled to at least one detector 110, bone conduction speaker 122, and/or database 130 to access information and/or data.

In some embodiments, processor 140 may include a test signal generation module 141 and a feedback path characterization module 142 (as shown in FIG. 4 and FIG. 5). The test signal generation unit 141 may transmit an audio test signal (eg, the first audio test signal) to the bone conduction speaker 122 and the feedback path characterization unit 142 . The bone conduction speaker 122 may generate a sound (eg, a first sound) based on the audio test signal. Upon receiving the sound emitted by the bone conduction speaker 122, the at least one detector 110 may generate a feedback signal (eg, a first feedback signal) based on the sound and transmit the feedback signal to the feedback path characterization module 142, and the module Feedback path characterization 142 may determine the feedback path transfer function based on the audio test signal and the feedback signal output from at least one detector 110. In some embodiments, based on the feedback signal transmitted along the airborne transmission path. conductivity of both the vibration transmission path and the audio test signal corresponding to this feedback signal, the feedback path characteristic determining unit 142 can determine the corresponding feedback path transfer function (ie, the first feedback path transfer function). Based on the feedback signal transmitted only on the air-conducted transmission path and the audio test signal corresponding to the feedback signal, the feedback path characteristic determining unit 142 can determine the corresponding feedback path transfer function (i.e., the second path transfer function feedback). In some embodiments, feedback path characterization module 142 may determine a vibration transfer function based on two previously determined feedback path transfer functions.

In some embodiments, processor 140 may also include a feedback analysis module and a signal processing module. In some embodiments, processor 140 may determine the transfer function of the feedback path from the bone conduction speaker 122 in the bone conduction hearing device to the at least one detector 110 in real time based on the feedback signal from the at least one detector 110. Processor 140 may also compare the real-time feedback path transfer function with other predefined feedback path transfer functions to determine the real-time status of the bone conduction hearing device.

Database 130 may store data, commands, and/or some other information, such as the first feedback path transfer function described above. In some embodiments, database 130 may store data received from at least one 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 performing or implementing examples of the methods proposed in the present invention. In some embodiments, the database 130 may include a mass storage device, a removable storage device, a volatile read-write storage device, a read-only memory (ROM), or the like. or any combination of such devices. In some embodiments, the database 130 may be implemented on a cloud platform.

In some embodiments, the database 130 may communicate with at least one other component (e.g., processor 140) in the system 100. At least one component in the system 100 can access and access data stored in the database 130 ( for example, to the first transfer function of the feedback path). In some embodiments, the database 130 may be part of the processor 140.

In fig. 2 is an example of a procedure for obtaining a vibration transfer function in accordance with some embodiments of the present invention. In particular, routine 200 may be performed by system 100 (eg, processor 140). For example, routine 200 may be stored (eg, in database 130) in the form of a program or instructions, and routine 200 may be implemented when system 100 (eg, processor 140) executes the program or instructions.

At step 210, the test signal generating unit 141 may generate a first audio test signal and a second audio test signal. In some embodiments, step 210 may be implemented by audio test signal generating module 310.

In some embodiments, test signal generation module 141 may be a signal source capable of generating and outputting electrical signals with certain characteristics. For example, the first audio test signal or the second audio test signal may be a white noise signal, a pure audio signal, a pulse signal, a narrowband noise signal, a linear frequency modulated narrowband pulse signal, and/or a frequency sweep audio signal. When a sound generating device (eg, bone conduction speaker 122) receives a white noise signal, the sound generating device can generate noise with the same energy density at all frequencies, in other words, white noise. When such an audio generating apparatus receives a pure audio signal, the audio generating apparatus can generate a single audio signal, in other words, pure audio. When such an audio generating apparatus receives a frequency sweep audio signal, the audio generating apparatus can generate audio with a continuously varying frequency from high to low frequency (or from low to high frequency) in a certain frequency range, in other words, frequency sweep audio .

In some embodiments, the first audio test signal and the second audio test signal may be signals sequentially generated by the test signal generation unit 141 at different times and used to test the equipment to be tested. In some embodiments, to maintain consistency between the two test conditions, the first audio test signal and the second audio test signal may be exactly the same, that is, the type and frequency of the first audio test signal and the second audio test signal may be the same. For example, the first audio test signal and the second audio test signal may be identical frequency sweep signals. In some embodiments, the types of the first audio test signal and the second audio test signal may be different. For example, the first audio test signal may be a white noise signal, and the second audio test signal may be a pure audio signal.

In some alternative embodiments, testing the equipment using the first audio test signal and testing the equipment using the second audio test signal can be performed at the same time simultaneously. At this time, the test signal generating unit 141 can generate only one audio test signal, for example, only the first audio test signal or only the second audio test signal, so as to achieve testing purposes. More information on this subject can be found in the corresponding description of step 230.

At step 220, bone conduction speaker 122 may generate a first sound based on the first audio test signal, and generate a second sound based on the second audio test signal.

The first audio test signal and the second audio test signal may be transmitted to the bone conduction speaker 122 in the form of electrical signals, and the bone conduction speaker 122 may convert these electrical signals into a first sound and a second sound, respectively. In some embodiments, bone conduction speaker 122 may include a vibration plate and a transducer. This transducer may be configured to generate vibrations, for example, by converting electrical signals corresponding to the first audio test signal and the second audio test signal into mechanical vibrations (vibrations). The transducer may vibrate said vibrating plate. For example, the vibrating plate may be mechanically coupled to the transducer and vibrate under its influence. In practical applications (eg, a user wears a hearing device 120), the vibration plate may contact the user's skin and transmit vibrations to the auditory nerve through the person's soft tissue and bone so that the user can hear sound.

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

In some embodiments, the generation of the first sound and the second sound may be performed sequentially by the same bone conduction loudspeaker 122 at the same position in the same hearing device 120. In such cases, by changing the position of the microphone, it is possible to obtain the sound exposure emitted by bone conduction loudspeaker 122 at different positions to obtain transfer functions corresponding to different acoustic paths. In other embodiments, the bone conduction speaker 122 may include two bone conduction speakers 122 of the same design and materials such that the two bone conduction speakers 122 can generate a first sound and a second sound based on the first audio test signal and the second audio test signal, respectively.

At step 230, the at least one detector may output a first feedback signal after receiving a first sound at a first position and output a second feedback signal after receiving a second sound at a second position.

The at least one detector may receive a first sound and generate a first feedback signal based on the first sound, receive a second sound and generate a second feedback signal, and transmit the first feedback signal and the second feedback signal to a device for testing the feedback path ( for example, feedback path characteristic determination module 142).

For convenience of description, it is further assumed by way of example that the at least one detector is an air conduction microphone (eg, the microphone shown in FIG. 4 and FIG. 5). This microphone may, at a first position, receive a first sound transmitted by the bone conduction speaker 122 in a first manner. For example, the bone conduction speaker 122 may be attached to the hearing device 120 (in other words, the bone conduction speaker 122 may be rigidly or elastically coupled to the hearing device 120), and the first position may be another position proximal to the hearing device 120 (such as position 121 shown in Fig. 1 or Fig. 4). When the microphone is in the first position, the microphone may be rigidly or elastically coupled to the hearing device 120. According to the principles of sound generation by the bone conduction speaker 122, when such bone conduction speaker 122 generates sound, the bone conduction speaker 122 may excite vibration of the hearing device 120 (body), such that the vibration of the hearing device 120 can be transmitted to a microphone located close to the hearing device 120. For example, as shown in FIG. 4, the first position may be a position adjacent to the housing 121 of the hearing device 120. Assuming that the vibration direction of the housing 121 is parallel to the vibration direction of the microphone diaphragm, the vibration of the housing 121 may also cause the microphone diaphragm to vibrate. At the same time, the bone conduction speaker 122, when it generates the first sound, can also cause vibrations in the surrounding air, so that these air vibrations can be transmitted to the microphone through air conduction. Therefore, the first sound can be transmitted to the microphone through vibrational conduction and through air conduction at the same time. In other words, the above first method can cover both vibration conduction and air conduction.

In some embodiments, a microphone may generate a first feedback signal based on the first audio transmitted along the two audio paths discussed above, and the microphone may transmit the first feedback signal to the feedback path characterization module 142 and/or store it in a memory device ( for example, there are 130 data in the database).

Likewise, the microphone may, at a second position, receive a second sound transmitted by the bone conduction speaker 122 using a second method. For example, the second position may not be in contact with the hearing device 120 (body 121), but rather located close to the first position. When the microphone is in the second position, the microphone may be considered suspended relative to the hearing aid 120. Alternatively, the second position may be located inside or outside the hearing aid 120, but such that the microphone in this position does not have a rigid or flexible connection to the hearing aid. device 120. For example, in the case shown in FIG. 5, since the microphone, when in the second position, is not in contact with the body 121, the diaphragm of this microphone can only receive sound transmitted through air and is not affected by the vibration of the body 121. Therefore, the second sound can only be transmitted to the microphone through air conduction. In other words, the second method mentioned above can only use air conduction. In some embodiments, a microphone may generate a second feedback signal based on the second sound transmitted over the air conduction path, and the microphone may provide the second feedback signal to the feedback path characterization module 142 and/or store it in a memory device (e.g., there are 130 data in the database). It should be understood that when the distance between the second position and the first position is very small (for example, less than 1 mm, 5 mm, 1 cm, 5 cm), it is approximately considered that the air conduction sound transmission path from the bone conduction speaker 122 to the first position is the same as the air conduction sound transmission path from the bone conduction speaker 122 to the second position.

In some alternative embodiments, when the microphone is in the first position and the direction of vibration of the housing 121 is vertical relative to the direction of vibration of the microphone diaphragm, vibrations of the housing 121 cannot cause vibrations of the vibrating parts (eg, the diaphragm) of the microphone. In such cases, it can be assumed that the microphone in the first position can only receive sound transmitted through the air. Therefore, the procedure of placing the microphone in a second position separate from the housing 121 to receive the second sound can be replaced by adjusting the orientation of the microphone so that when the microphone is in the first position, the direction of vibration of the diaphragm can be vertical with respect to the vibration direction of the housing 121. Because the diaphragm is not affected by the vibrations of the housing 121, even if the microphone is very close to the housing 121, the second sound received by the microphone could only be transmitted to the microphone through air conduction. Therefore, when the vibration direction of the microphone diaphragm is vertical to the vibration direction of the housing 121, only the air conduction feedback path transfer function may need to be considered when determining 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 may only be necessary to set the vibration direction of the diaphragm of the microphone in the first position parallel or vertical with respect to the vibration direction of the housing 121. Then the microphone can output the first signal feedback and a second feedback signal, respectively, in response to the first sound and the second sound received by it.

In some embodiments, the at least one detector (eg, an air-conducted microphone or simply a microphone) may comprise a first detector (eg, a first air-conducted microphone) and a second detector (eg, a second air-conducted microphone) of the same design and from the same materials. In some embodiments, the at least one detector (eg, an air conduction microphone or simply a microphone) may comprise a first detector (eg, a silicon microphone) and a second detector (eg, an electret microphone) of different designs and materials. In some embodiments, said microphone may be an air conduction microphone or a bone conduction microphone. For ease of understanding, the present invention describes an air conduction microphone. A first detector may be located at a first position to receive a first sound, and a second detector may be located at a second position to receive a second sound. Similar to the above embodiments, the first detector may output a first feedback signal upon receiving a first sound, and the second detector may output a second feedback signal upon receiving a second sound.

In other embodiments, the first detector and the second detector may be placed at the first position and the second position, respectively, at the same time, such that the first detector and the second detector may receive the same sound at the same time . For example, the bone conduction speaker 122 may generate a first sound based on only one audio test signal (e.g., a first audio test signal), and a first detector and a second detector may be located at a first position and a second position, respectively, to receive the first sound at the same time. In these embodiments, although the first detector and the second detector receive the same sound, the transmission path of the first sound received by the first detector may include an air conduction transmission path and a vibration transmission path, while the transmission path of the first sound received by the second detector may comprise only an air-conducted transmission path such that the feedback signals output by the first detector and the second detector may be different. For convenience of description, the feedback signal output by the first detector may also be referred to as a first feedback signal, and the feedback signal output by the second detector may also be referred to as a second feedback signal. The first feedback signal and the second feedback signal output by the same detector located at the first position and the second position, respectively, may differ slightly so that the first and second feedback signals can be considered approximately the same.

At step 240, the feedback path characterization module 142 may determine the vibration transfer function from the bone conduction speaker 122 to the first position based on the first audio test signal, the second audio test signal, the first feedback signal, and the second feedback signal. In some embodiments, step 240 may be performed by processing module 320.

In some embodiments, upon receiving the first feedback signal and the second feedback signal output by the microphone, the feedback path characteristic determining module 142 may determine the feedback path transfer function based on the first audio test signal, the second audio test signal, the first a feedback signal and a second feedback signal in accordance with the principles of measuring the transfer function of the feedback path. In some embodiments, feedback path characterization module 142 may receive a first audio test signal from test signal generation module 141. In some embodiments, after receiving the first audio test signal and the first feedback signal, the feedback path characteristic determining module 142 may determine a first feedback path transfer function for the first sound transmitted from the bone conduction speaker 122 to the first position based on the first audio test signal and first feedback signal. For example, the feedback path characterization module 142 may convert the first audio test signal to obtain a first converted audio test signal, and convert the first feedback signal to generate a first converted feedback signal. In some embodiments, feedback path characterization module 142 may transform the first audio test signal and the first feedback signal using a Z-transform. For example, the first audio test signal input to the bone conduction speaker 122 may be converted to a first converted audio test signal via a Z-transform, and the first feedback signal output by the air conduction microphone may be converted to the first Z-transformed feedback signal. In some embodiments, such transformation may be performed using a Fourier transform method, a Laplace transform method, a linear prediction encoder, or other speech model solving method, or the like.

In some embodiments, the method of measuring the transfer function may be, but may not be limited to, a cross-correlation method, an adaptive estimation method, or other similar method. In some embodiments, a method of measuring a transfer function may comprise obtaining a converted signal by converting an audio signal and an electrical signal and then determining a transfer function in accordance with the converted signal. The corresponding descriptions can be found in the descriptions of formulas (1) – (5).

For purposes of illustration, the feedback path characteristic determining unit 142 may obtain the first feedback path transfer function using Formula (1) below based on the first converted audio test signal and the first converted feedback signal:

Where, – the first converted audio test signal, – the first converted feedback signal, – the first transfer function of the feedback path. As noted above, the first transfer function of the feedback path may show the influence of the air conduction transmission path and the vibration transmission path from the bone conduction speaker 122 to the first position.

In some embodiments, feedback path characterization module 142 may receive a second audio test signal from test signal generating module 141. In some embodiments, after receiving the second audio test signal and the second feedback signal, the feedback path characterization module 142 may determine the second feedback path transfer function for the second audio transmitted from the bone conduction speaker 122 to the second position based on the second audio test signal and a second feedback signal. For example, the feedback path characterization unit 142 may convert the second audio test signal and the second feedback signal, respectively, to obtain a second converted audio test signal and a second converted feedback signal. In some embodiments, feedback path characterization module 142 may transform the second audio test signal and the second feedback signal using a Z-transform. For example, a second audio test signal input to the bone conduction speaker 122 may be converted to a second converted audio test signal via a Z-transform, and a second feedback signal output to the air conduction microphone may be converted to the second converted feedback signal by Z-transform.

Likewise, for purposes of illustration, the feedback path characteristic determining unit 142 may obtain the second feedback path transfer function using Formula (2) below based on the second converted audio test signal and the second converted feedback signal:

Where – second converted audio test signal, – second converted feedback signal, – second transfer function of the feedback path. As noted above, the second feedback path transfer function may show the influence of only the air conduction transmission path between the bone conduction speaker 122 and the second position (or first position).

As a result of the calculations of Formula (1) and Formula (2) above, the feedback path characteristic determining unit 142 can determine the first feedback path transfer function corresponding to the first sound transmitted along the air conduction transmission path and the vibration transmission path, and determining a second feedback path transfer function corresponding to the second sound transmitted along the air conduction transmission path, then, through subsequent analysis, the vibration transfer function from the bone conduction speaker 122 to the first position can be determined.

In some embodiments, feedback path characterization module 142 may determine a vibration transfer function from bone conduction speaker 122 to a first position based on the first feedback path transfer function. and the second transfer function of the feedback path .

In particular, since the first transmission path of the first sound received by the microphone at the first position may include an air-conducted transmission path and a vibration transmission path, and the second transmission path of the second sound received by the microphone at the second position may comprise only an air-conducted transmission path, The output signals of the air conduction microphone (in other words, the first feedback signal and the second feedback signal) may be different.

For purposes of illustration, the first transfer function of a feedback path comprising an air-conducted transmission path and a vibration transmission path can be expressed as:

F ₁ (z) = A ₁ (z) + B ₁ (z) ... (3)

where A ₁ (z) is the transfer function of the air-conducted feedback path from the bone-conducted loudspeaker 122 to the first position, – vibration transfer function from bone conduction loudspeaker 122 to the first position.

In fig. 6 shows a graph of the first transfer function of the feedback path , determined by formula (3).

In some embodiments, given the small distance between the second position and the first position, the air-conducted transmission path from the bone-conducted loudspeaker 122 to the second position may be approximately equivalent to the air-conducted transmission path from the bone-conducted loudspeaker 122 to the first position. Therefore, the transfer function of the second feedback path, containing only the air-conducted transmission path, can be expressed as:

F ₂ (z) = A ₂ (z) ... (4)

Where is the transfer function of the air conduction feedback path from the bone conduction loudspeaker 122 to the second position, this function may be the same or approximately the same as the transfer function a feedback path from the bone conduction speaker 122 to the first position. In fig. 7 shows a graph of the second transfer function feedback path determined by formula (2). As noted above, the second transfer function The feedback path may only show the influence of the air conduction transmission path between the bone conduction speaker 122 and the second position (or first position).

In some embodiments, feedback path characterization module 142 may determine a vibration transfer function from bone conduction speaker 122 to a first position based on the first transfer function. feedback path and second transfer function feedback path. In particular, since the second transfer function the feedback path shows only the transfer function air conduction feedback path, and the first transfer function The feedback path contains a transfer function air-conducted feedback path and transfer function vibration, then the feedback path characteristic determination module 142 may subtract formula (4) from formula (3) to determine the transfer function vibration:

B ₁ (z) = F ₁ (z) – F ₂ (z) ... (5)

In fig. 6 is a graph of a first transfer function of a feedback path including an air-conducted transmission path and a vibration transmission path. The curve in Fig. 6 shows a situation where the first sound received at the first position was transmitted through both the air-conducted transmission path and the vibration transmission path, at different frequencies. It can be seen that in the range of about 1000 Hz (for example, 600 Hz - 1000 Hz), the dependence of the influence of the bone conduction loudspeaker on the first position through both paths - the air conduction transmission path and the vibration transmission path, has a dip (i.e. influence small) compared to other frequency ranges; in the range of 300 Hz - 400 Hz and in the range of 2000 Hz - 3000 Hz, the influence of the bone conduction loudspeaker on the first position at the same time through the air conduction transmission path and the vibration transmission path has a peak (i.e., the influence is large) at compared to other frequency ranges.

In fig. 7 shows a plot of a second transfer function of a feedback path containing only an air-conducted transmission path. The curve shown in Fig. 7 shows a situation where the second sound received at the second position travels only through the air conduction transmission path, at different frequencies. When the frequency is in the range of 0 Hz - 1000 Hz, the bone conduction speaker may have a slight influence on the second position through the air conduction transmission path. When the frequency is in the range of 1000 Hz - 3000 Hz, the bone conduction speaker can have more influence on the second position through the air conduction transmission path. In some embodiments, when the second feedback path transfer function shown in FIG. 7 is subtracted from the first feedback path transfer function shown in FIG. 6, the curve shown in FIG. 8. In FIG. 8 it can be seen that the vibration transmission path can have a greater influence in the spectral regions with frequencies in the range of 0 Hz - 1000 Hz and a lesser influence in the spectral regions with frequencies above 1000 Hz. Based on FIG. 6, fig. 7 and fig. 8, it can be seen that the effect of a bone conduction loudspeaker on the first position via the vibration transmission path may be concentrated primarily in the low frequency range (e.g., less than 1000 Hz), whereas the influence of a bone conduction loudspeaker on the first position (or second position) via the path Air-conducted transmissions may be concentrated primarily in the high-frequency range (eg, greater than 1000 Hz).

In some embodiments, feedback path characterization module 142 may determine a vibration feedback signal from bone conduction speaker 122 to a first position based on the first feedback signal and the second feedback signal.

For purposes of illustration, the feedback path characteristic determining unit 142 may obtain the vibration feedback signal based on the first feedback signal and the second feedback signal using formula (6):

X _d = X ₁ – X ₂ … (6)

where X ₁ is the first feedback signal, X ₂ is the second feedback signal, X _d is the vibration feedback signal.

In some embodiments, feedback path characterization module 142 may determine a vibration transfer function from bone conduction speaker 122 to a first position based on the first audio test signal, the second audio test signal, and the vibration feedback signal.

In some embodiments, feedback path characterization module 142 may transform the first audio test signal, the second audio test signal, and the vibration feedback signal, respectively, to obtain a first transformed audio test signal, a second transformed audio test signal, and a transformed feedback signal. vibrations. For example, the first audio test signal Y ₁ may be converted to obtain a first transformed audio test signal Y ₁ (z) by Z-transform, the second audio test signal Y ₂ may be converted to obtain a second transformed audio test signal By means of a Z-transform, the second audio test signal X _d can be converted to obtain a second transformed audio test signal via Z-transform.

In some embodiments, feedback path characteristic determining module 142 may determine a first feedback path transfer function from the audio generation module to a first position based on the first transformed audio test signal, the second transformed audio test signal, and the transformed vibration feedback signal. In particular, the feedback path characteristic determining unit 142 may determine an average or a weighted average of the first transformed audio test signal and the second transformed audio test signal to obtain an average transformed audio test signal.

For the purpose of explanation, the feedback path characteristic determining unit 142 can obtain the average transformed audio test signal based on the first transformed audio test signal and the second transformed audio test signal using formula (7):

Y _d (z) = (Y ₁ (z) + Y ₂ (z))/2 ... (7)

Where – first converted audio test signal, Y ₂ (z) – second converted audio test signal, - average converted audio test signal.

In some embodiments, feedback path characterization module 142 may obtain the vibration transfer function from bone conduction speaker 122 to the first position based on the average of the converted audio test signal and the converted vibration feedback signal.

For purposes of illustration, feedback path characterization module 142 may obtain the vibration transfer function from bone conduction speaker 122 to the first position using formula (8) based on the average of the converted audio test signal and the converted vibration feedback signal:

Where – average converted audio test signal, – converted vibration feedback signal, – vibration transfer function.

In some embodiments, feedback path characterization module 142 may also determine an average and a weighted average of the first audio test signal and the second audio test signal to obtain an average audio test signal. This average audio test signal and the vibration feedback signal can be converted to obtain an average converted audio test signal and a converted vibration feedback signal. Then, based on the average of the converted audio test signal and the converted vibration feedback signal, a vibration transfer function from the bone conduction speaker 122 to the first position can be obtained.

It should be noted that the above description is offered for illustrative purposes only and is not intended to limit the scope of the present invention. Changes and modifications may be made by those skilled in the art in accordance with the contents of this disclosure. The features, structures, methods, and other components of the example embodiments described herein can be combined in various ways to implement additional and/or alternative example embodiments. For example, feedback path characteristic determination module 142 may include a first decider and a second decider, the first decider may be configured to determine a first feedback path transfer function with respect to the first feedback path, and the second decider may be used to determine a second transfer function of the feedback path. However, these changes and modifications do not depart from the scope of the present invention.

In fig. 3 shows an example diagram of system modules for obtaining a vibration transfer function in accordance with some embodiments of the present invention. The vibration transfer function deriving system 300 may be simply referred to as system 300 for short. As shown in FIG. 3, system 300 may include an audio test signal generation module 310 and a processing module 320. In some embodiments, system 300 may be implemented by system 100 (eg, processor 140) shown in FIG. 1.

The audio test signal generating unit 310 may be configured to generate a first audio test signal and a second audio test signal. In some embodiments, the first audio test signal or the second audio test signal may comprise at least one of a white noise signal, a pure audio signal, a pulse signal, a narrowband noise, a linear frequency modulated narrowband pulse signal, and/or an audio signal. with frequency sweep. In some embodiments, the types and frequencies of the first audio test signal and the second audio test signal may be the same, for example, the first audio test signal and the second audio test signal may be pure audio signals of the same frequency. In some embodiments, the type of the first audio test signal and the type of the second audio test signal may be different. For example, the first audio test signal may be a white noise signal, and the second audio test signal may be a pure audio signal. In some embodiments, the audio test signal generating module 310 may generate only one audio test signal, for example, only the first audio test signal or only the second audio test signal, which may also allow the vibration transfer function to be obtained. For details, please refer to the corresponding description of step 230.

The processing module 320 may be used to determine a vibration transfer function from the bone conduction speaker 122 to the first position based on the first audio test signal, the second audio test signal, the first feedback signal, and the second feedback signal. The first feedback signal may reflect a signal transmitted from the bone conduction speaker 122 to the first position along the vibration transmission path and the air conduction transmission path, the second feedback signal may reflect the signal transmitted from the bone conduction speaker 122 to the second position along the transmission path with air conduction. The first feedback signal may be output by the at least one microphone after receiving the first sound at the first position, and the second feedback signal may be output by the at least one microphone after receiving the second sound at the second position. These first sound and second sound may be generated by the bone conduction speaker 122 based on the first audio test signal and the second audio test signal, respectively. For further information regarding generating the first sound and the second sound based on the first audio test signal and the second audio test signal, please refer to the detailed description of step 220, which will not be repeated here.

In some embodiments, after receiving the first audio test signal, processing module 320 may determine a first feedback path transfer function in accordance with the first sound passed from the bone conduction speaker 122 to the first position, based on the first audio test signal and the first signal feedback. For further information regarding the determination of the first feedback path transfer function, please refer to the detailed description shown in FIG. Stage 2 240, which will not be repeated here.

In some embodiments, processing module 320 may also determine a second feedback path transfer function for the second audio passed from the bone conduction speaker 122 to the second position based on the second audio test signal and the second feedback signal. For further information regarding the determination of the transfer function of the second feedback path, please refer to the detailed description shown in FIG. Stage 2 240, which will not be repeated here.

In some embodiments, 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 further information regarding determining the vibration transfer function from the bone conduction speaker 122 to the first position, please refer to the detailed description shown in FIG. Stage 2 240, which will not be repeated here.

In some embodiments, processing module 320 may determine a vibration feedback signal from bone conduction speaker 122 to a first position based on the first feedback signal and the second feedback signal. In some embodiments, processing module 320 may also determine a vibration transfer function from bone conduction speaker 122 to the first position based on the first audio test signal, the second audio test signal, and the vibration feedback signal. For further information regarding determining the vibration transfer function from the bone conduction speaker 122 to the first position, please refer to the detailed description shown in FIG. Stage 2 240, which will not be repeated here.

It should be noted that the above description is presented for illustrative purposes only and is not intended to limit the scope of the present invention in any way. Those skilled in the art will be able to make numerous changes and modifications in accordance with the contents of the description of the present invention. The features, structures, methods, and other characteristics of the exemplary embodiments described herein may be combined in various ways to provide additional 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 may be configured to determine a first feedback path transfer function for the first feedback path, and the second processing module may be configured to determine a second feedback path transfer function. . However, these changes and modifications do not depart from the scope of the present invention.

In other embodiments of the present invention, a computer-readable storage medium may be provided comprising at least one processor 140 and at least one database 130. The at least one database 130 may be configured to store computer instructions, and the at least one processor 140 may be configured to execute at least a portion of those computer instructions to implement the above procedure 200.

In other embodiments, the present invention also provides a method for determining the status of a bone conduction hearing device. In fig. 9 is an example of a logic diagram of a procedure for determining the status of a bone conduction hearing device in accordance with some embodiments of the present invention. The bone conduction hearing device may include at least a microphone, a loudspeaker, a feedback analysis module, and a signal processing module. In some embodiments, the microphone may be a bone conduction microphone, an air conduction microphone, or the like. The microphone mentioned above may be an example of embodiments of at least one detector described in the present invention, for example, the microphone may be the microphone shown in FIG. 4 and fig. 5. The loudspeaker may be a bone conduction loudspeaker configured to convert electrical signals into mechanical vibration signals, and may be the same as or different from the bone conduction loudspeaker 122. The microphone and the bone conductive loudspeaker may be, respectively, installed in different positions of the bone conduction hearing device. For example, the microphone and loudspeaker may be respectively mounted at various positions on the body of the bone conduction hearing device. In some embodiments, the feedback analysis module and the signal processing module may be two separate devices, or they may be components of a single device that perform different functions. For example, a feedback analysis module and a signal processing module may be combined into a state determination device. It can be understood that the status sensing device may be combined with a microphone and loudspeaker to form an integral device, or it may be a device independent of the microphone and loudspeaker. To distinguish between the above two construction methods, the following description suggests two application scenarios. For example, when a condition detection device is combined with a microphone and a loudspeaker to form an integrated device, the bone conduction hearing device may implement a condition self-sensing device before or during use to determine whether the bone conduction hearing device is in a normal state or an abnormal state. condition. The set of abnormal conditions contains one or more conditions from the group - a condition of improper wearing, a condition with abnormal structure, a condition with penetration of a foreign body, and a condition with blocking by a foreign body. As another example, when the condition sensing device is configured independently of the microphone and speaker, the bone conduction hearing device may communicate and/or be connected to the condition sensing device before or during use to determine whether the bone conduction hearing device is conductivity in normal or abnormal condition. The set of abnormal conditions contains one or more conditions from the group - a condition of improper wearing, a condition with abnormal structure, a condition with penetration of a foreign body, and a condition with blocking by a foreign body.

A method for determining the status of a bone conduction hearing device may comprise the following steps:

At step 910, the speaker may generate a third sound based on the first signal. In some embodiments, the first signal may be similar to the first audio test signal or the second audio test signal, the description of which will not be repeated here. In some embodiments, step 910 may be performed by audio generation module 1010.

In some embodiments, the signal processing module may generate a first signal (ie, an audio test signal) that may be transmitted to a speaker, and the speaker may convert the first signal into a third sound.

At step 920, the microphone may receive the third sound and generate a feedback signal. In some embodiments, step 920 may be performed by feedback signal generation module 1020.

The sound generated by the loudspeaker can be received by a microphone, and the microphone can generate corresponding feedback information. In some embodiments, after a microphone receives a third sound, the microphone may generate a feedback signal based on the third sound and provide the feedback signal to a feedback analysis module. In some embodiments, the microphone may generate a feedback signal in a similar or similar manner to how the first feedback signal discussed above is generated.

At step 930, the feedback analysis module may determine the transfer function of the feedback path from the speaker of the bone conduction hearing device to the microphone based on the feedback signal from the microphone and the first signal. Step 930 may be performed by feedback analysis module 1030.

In some embodiments, the method for determining the transfer function of the feedback path from the loudspeaker of the bone conduction hearing device to the microphone may be the same as the method for determining the first transfer function feedback path and/or second transfer function feedback path shown in FIG. 2. For purposes of explanation, the transfer function The feedback path from the loudspeaker of a bone conduction hearing device to the microphone can be determined by formula (9):

Where – represents the first converted signal obtained by Z-transforming the first signal input to the bone conduction hearing device, – represents the converted feedback signal obtained by Z-transforming the feedback signal output by the microphone.

As a result of Z-transformation of the first signal and the feedback signal, a first transformed signal can be obtained and converted signal feedback. Now the transfer function of the feedback path from the loudspeaker of the bone conduction hearing device to the microphone can be determined by formula (9).

At step 940, at least one predefined feedback path transfer function may be obtained. Step 940 may be performed by feedback analysis module 1030.

By predefined feedback path transfer function(s) can be understood the feedback path transfer function(s) previously defined or stored in the storage device(s) (eg, in the database 130). In some embodiments, the predetermined feedback path transfer function(s) may be a feedback path transfer function found according to a method described in other embodiments of the present invention (eg, at step 240), such as a first feedback path transfer function. In some embodiments, the predefined feedback path transfer function(s) may also be a feedback path transfer function manually set by the operator, in accordance with his experience. In some embodiments, the plurality of predefined feedback path transfer functions may comprise at least one of a standard feedback path transfer function or an anomalous feedback path transfer function. The standard feedback path transfer function may be a feedback path transfer function corresponding to the normal state of the bone conduction hearing device. For example, a standard feedback path transfer function may reflect the characteristic feedback path function of a bone conduction hearing device when worn by a wide variety of people, or it may be a characteristic feedback path function personalized for a specific user who typically wears and uses a particular hearing aid. device. The abnormal feedback path transfer function may be a feedback path transfer function corresponding to an abnormal condition of the bone conduction hearing device. The set of anomalous feedback path transfer functions may contain one or more of the following functions - the feedback path transfer function when worn incorrectly, the feedback path transfer function when abnormal structure, the feedback path transfer function when foreign body penetration and the feedback path transfer function when blocking by a foreign body. In some embodiments, the abnormal feedback path may correspond to a variety of possible abnormal feedback situations. In some embodiments, the set of predefined feedback path transfer functions may be a set of feedback path transfer functions from the loudspeaker to the microphone when the bone conduction hearing device is in various states. The set of different states of a bone conduction hearing device may comprise a state when a user is wearing the bone conduction hearing device (at which time the speaker or body of the bone conduction hearing device is mated and in contact with the user's face) and a state when the user is not wearing the device. (at this time, the loudspeaker or body of the bone conduction hearing device is not paired with or in contact with the user's face). Accordingly, the at least one predefined feedback path transfer function may be a feedback path transfer function when the user wears a bone conduction hearing device (also known as the “first predefined feedback path transfer function”) and a transfer function feedback path when the user is not wearing a bone conduction hearing device (also known as the “second predefined feedback path transfer function”).

At step 950, the found feedback path transfer function can be compared with at least one predetermined feedback path transfer function. Step 950 may be performed by feedback analysis module 1030.

In some embodiments, the feedback path transfer function found at step 930 can be compared with at least one predetermined feedback path transfer function to determine the status of the bone conduction hearing device. In some embodiments, it is possible to determine whether the difference between a subject feedback path transfer function and a standard feedback path transfer function from a population of at least one predetermined feedback path transfer function is within a predetermined threshold range: if it is, it is possible to determine that the considered transfer function of the feedback path is normal; If not, it can be determined that the feedback path transfer function in question is anomalous. In some embodiments, it may also be determined whether the ratio of the feedback path transfer function in question to a standard feedback path transfer function from a plurality of at least one predetermined feedback path transfer function is within a predetermined threshold range. If found, it can be determined that the feedback path transfer function in question is normal; If not, it can be determined that the feedback path transfer function in question is anomalous. In some embodiments, it may be determined whether the difference between a subject feedback path transfer function and an anomalous feedback path transfer function from a population of at least one predefined feedback path transfer function is within a predetermined threshold range: if found, may it is determined that the considered feedback path transfer function is anomalous; If not, it can be determined that the feedback path transfer function in question is normal. In some embodiments, it may also be determined whether the ratio of a subject feedback path transfer function to an anomalous feedback path transfer function from a plurality of at least one predetermined feedback path transfer function is within a predetermined threshold range. If found, it can be determined that the feedback path transfer function in question is anomalous; If not, it can be determined that the feedback path transfer function in question is normal. In some embodiments, the above-mentioned preset threshold range can be set manually, and it can be adjusted according to various situations, which is not limited to this application.

In some embodiments, if the population of at least one predefined feedback path transfer function contains at least two predefined feedback path transfer functions, then the predefined feedback path transfer function with the smallest difference relative to the feedback path transfer function in question can be define as the final predefined transfer function of the feedback path. For example, the plurality of at least one predefined feedback path transfer function may comprise a first predefined feedback path transfer function and a second predefined feedback path transfer function. If the difference between the first predetermined feedback path transfer function and the subject feedback path transfer function is greater than the difference between the second predetermined feedback path transfer function and the subject feedback path transfer function, the second predetermined feedback path transfer function may be defined as the final predefined transfer function of the feedback path.

At step 960, the signal processing module may determine the state of the bone conduction hearing device according to the comparison result. Step 960 may be performed by signal processing module 1040.

In some embodiments, the result of the comparison may indicate that the feedback path transfer function in question is normal or abnormal. In some embodiments, if the feedback path transfer function is normal, the condition of the bone conduction hearing device may be determined to be normal; if the transfer function of the feedback path is abnormal, it can be determined that the state of the hearing device is abnormal. In some embodiments, the condition of the bone conduction hearing device may be a normal condition or an abnormal condition. The abnormal condition may be one or more of the group of improperly worn condition, abnormal structure condition, foreign body penetration condition, and foreign body blocking condition. The wearing state means that the wearer wears a bone conduction hearing device on his body. The non-wearing condition means that the person is not wearing the bone conduction hearing device on their body. The normal structure state means that the structures and/or components of the bone conduction hearing device are in normal operating condition, so that the bone conduction hearing device can be used normally. An abnormal structure condition may be the opposite of a normal structure condition, which means that the structure and/or components of the bone conduction hearing device may be in an abnormal operating condition (eg, any component of the bone conduction hearing device is misaligned, loose, or damaged due to collision). A foreign body intrusion condition may mean that an object other than the structure and/or components of the bone conduction hearing device has entered the bone conduction hearing device. In some embodiments, a condition with a normal structure may be classified as a normal condition, and a condition with an abnormal structure and a condition with foreign body penetration may be classified as an abnormal condition. In some embodiments, said comparison result may reflect a wearing state of the bone conduction hearing device, such as a wearing state and a non-wearing state.

In some embodiments, the feedback path transfer functions of a bone conduction hearing device in a normal state (eg, a normal structure condition) and an abnormal condition (eg, a foreign body intrusion condition) can be determined using the method shown in FIG. . 2, and stored in the data base 130 as predefined feedback path transfer functions. In some embodiments, a feedback path transfer function corresponding to a bone conduction hearing device in an abnormal condition (e.g., in a state with foreign body penetration) may be used as an abnormal feedback path transfer function from a plurality of at least one predetermined a feedback path transfer function, and a feedback path transfer function corresponding to a bone conduction hearing device in a normal state (eg, in a normal structure state) can be used as a standard feedback path transfer function. In some embodiments, multiple predefined feedback path transfer functions may be stored in the database 130, and each of the predefined feedback path transfer functions may correspond to any one of the states (normal state, abnormal state) of the bone conduction hearing device. . In accordance with steps 950 and 960, by comparing the current feedback path transfer function of the bone conduction hearing device with at least one of the predetermined feedback path transfer functions recorded in the database 130, the previously recorded in the database 130 can be matched. the specified feedback path transfer function closest to the current feedback path transfer function of the bone conduction hearing device. Then, the state of the bone conduction hearing device corresponding to the matched predetermined feedback path transfer function may represent the current state of the bone conduction hearing device. Thus, according to the procedure described above, the current status of the bone conduction hearing device can be determined in real time.

In some embodiments, said comparison result may be used to identify different types in the aggregate of at least one predetermined feedback path transfer function and thereby determine different states of the bone conduction hearing device. In some embodiments, the constellation types of at least one predefined feedback path transfer function may be a standard feedback path transfer function and an anomalous feedback path transfer function. The abnormal feedback path transfer function may be one or more of the following—mis-wearing feedback path transfer function, abnormal structure feedback path transfer function, foreign body penetration feedback path transfer function, and blocking feedback path transfer function by a foreign body. From a set of types of one or more predetermined feedback path transfer functions for which the differences with respect to or relation to the feedback path transfer function under consideration are within a predetermined threshold range, the type of the feedback path transfer function under consideration can be determined, and then the bone conduction hearing device condition. For example, if the type of predetermined feedback path transfer function found is determined to correspond to a tight fit condition (in other words, the bone conduction hearing device is tightly fitted to the wearer), the type of feedback path transfer function being considered may also correspond to a tight fit condition, which may reflect the fact that the bone conduction hearing device is tightly fitted to the wearer. As another example, if the type of the found predetermined feedback path transfer function is determined to correspond to a loose fitting state, the type of feedback path transfer function under consideration may also correspond to the loose fitting state. Accordingly, this may reflect the fact that the bone conduction hearing device does not fit tightly to the user. As another example, different predefined feedback path transfer functions may correspond to different parts of a bone conduction hearing device worn on the head. If the type of predefined feedback path transfer function found by the proposed method corresponds to some part of the head (for example, on the mastoid process of the temporal bone, temporal bone or frontal part), the type of the considered feedback path transfer function can also correspond to this part of the head. Accordingly, this may reflect the position of the bone conduction hearing device worn by the user on the head (eg, on the mastoid process of the temporal bone, temporal bone, or frontal region).

In some embodiments, after determining the state of the bone conduction hearing device, signal processing module 1040 may adaptively adjust one or more parameters of the bone conduction hearing device. In some embodiments, after determining the condition of the bone conduction hearing device, the signal processing module 1040 may also provide reminder information to the user indicating the condition found above. In some embodiments, if the condition of the bone conduction hearing device is abnormal, the user may be reminded to adjust the condition of the bone conduction hearing device. In some embodiments, the means of reminding the user may be, but are not limited to, a voice prompt, a light bar or bulb prompt, a vibration prompt, a text prompt, a remote message, and the like. In particular, the voice prompt may be a voice message transmitted by a bone conduction hearing device, such as "a foreign body has entered the device." A bone conduction hearing device may also be equipped with a light display or a prompt light. When the bone conduction hearing device is in a normal state, the prompt signal light will be lit green, and when the bone conduction hearing device is in an abnormal state, the prompt signal light will be lit red as a reminder to the wearer. When the condition of the bone conduction hearing device is abnormal, the bone conduction hearing device will generate vibrations, for example, generating vibrations 3 times may indicate that the bone conduction hearing device has an abnormal structure; Continuous vibration may indicate the entry of a foreign body. The text prompt may be a text message presented on the display of a bone conduction hearing device or a terminal communicating and/or connected to the bone conduction hearing device to remind the user, for example, “a foreign body has entered the device” and “the device has an abnormal structure."

It should be noted that the above description is given for purposes of illustration only and is not intended to limit the scope of the present invention. Those skilled in the art will be able to make numerous changes and modifications in accordance with the teachings of the present invention. The features, structures, methods, and other characteristics of the exemplary embodiments described herein may be combined in various ways to provide additional and/or alternative exemplary embodiments. For example, many states of a bone conduction hearing device are possible, but which of these states are a normal state and which are an abnormal state can be determined by the operator's experience, the user, or the signal processing module 1040. However, these changes and modifications should not deviate from the scope of the present invention.

In fig. 10 is an example diagram of the modules of a system for determining the status of a bone conduction hearing device in accordance with some embodiments of the present invention. The system 1000 for determining the status of a bone conduction hearing device may be simply referred to as system 1000 for short. As shown in FIG. 10, in some embodiments, system 1000 may include an audio generation module 1010, a feedback signal generation module 1020, a feedback analysis module 1030, and a signal processing module 1040.

The sound generation module 1010 may be configured to generate a third sound based on the first signal. This first signal may be generated by a signal processing module. In some embodiments, sound generation module 1010 may be a bone conduction speaker or a portion of such a bone conduction speaker. For further information regarding generation of the third sound based on the first signal, please refer to the detailed description of FIG. 9, which will not be repeated here.

The feedback signal generating unit 1020 may be configured to receive the third sound and generate a feedback signal. In some embodiments, this feedback signal generation module 1020 may be a microphone or part of a microphone, or some kind of acoustoelectric sensor or vibration sensor. For further information regarding feedback signal generation, please refer to the detailed description of FIG. 9, which may not be repeated here.

The feedback analysis module 1030 may be configured to determine the transfer function of the feedback path from the loudspeaker of the bone conduction hearing device to the microphone based on the feedback signal and the first signal. This feedback analysis module 1030 may also be configured to obtain at least one predefined feedback path transfer function. In addition, feedback analysis module 1030 may also be configured to compare a considered feedback path transfer function with at least one predetermined feedback path transfer function. For additional information regarding determining the feedback path transfer function, comparing the feedback path transfer function in question and at least one predefined feedback path transfer function, please refer to the detailed description of FIG. 9, which will not be repeated here.

The signal processing module 1040 may be configured to determine the state of the bone conduction hearing device according to the comparison result. For further information regarding determining the status of a bone conduction hearing device, please refer to the detailed description of FIG. 9, which will not be repeated here.

In some embodiments of the present invention, a computer-readable medium for storing information may also be provided. This storage medium stores computer instructions. When a computer reads computer instructions from the information storage medium, the computer may perform: generating a third sound based on the first signal, where the first signal may be a test signal generated by the computer; receiving the third sound and generating a feedback signal; determining a transfer function of a feedback path from the speaker of the bone conduction hearing device to the microphone based on the feedback signal and the first signal; obtaining at least one predetermined feedback path transfer function; comparing the considered feedback path transfer function with at least one predetermined feedback path transfer function; Determining the status of the bone conduction hearing device according to the comparison result.

It should be noted that the above description of the system and its devices/modules is for convenience of description only and cannot limit the application to the scope of the options discussed here. It can be understood that experts in the field in question, after understanding the principles of the system, will be able to create any combination of various devices/modules or form a subsystem for connection with other devices/modules without deviating from these principles. For example, the feedback analysis module 1030 and the signal processing module 1040 shown in FIG. 10 may be different modules in a single device (eg, processor 140), or one module may implement the functions of two or more modules described above. For example, the feedback analysis module 1030 and the signal processing module 1040 may be two modules, or one module with signal analysis and signal processing functions simultaneously. As another example, each module may have its own module for storing information. As another example, each module may share a storage module with other modules. All such modifications are within the scope of protection of the present invention.

Possible beneficial effects of an embodiment of the present invention include, but are not limited to: (1) the vibration transfer function of a bone conduction speaker can be measured without the use of external devices such as accelerometers, making the testing procedure simpler and more convenient; (2) the current state of the bone conduction hearing device can be determined according to the detected feedback path transfer function, and a corresponding reminder can be sent to the user according to the state of the bone conduction hearing device, so that the user can know or adjust the state of the bone conduction hearing device, to improve that user's experience. It should be noted that different options may produce different beneficial effects. In various embodiments, the possible beneficial effects may be any one or combination of the above beneficial effects, or some other possible beneficial effects.

Having thus described the basic concepts, it may be readily apparent to those skilled in the art upon reading this detailed description that the foregoing detailed description is intended to be exemplary only and is not exhaustive. Numerous and various changes, improvements and modifications may be made or implied by those skilled in the art, although not expressly stated herein. These changes, improvements and modifications are intended to be provided by the present invention, and are within the spirit and scope of the exemplary embodiments of the present invention.

However, some technology has been used to describe embodiments of the present invention. For example, the terms “one embodiment,” “any of the embodiments,” and/or “some embodiments” mean that a particular feature, structure, or characteristic described in connection with the embodiment in question is included in at least one embodiment of the present invention. Thus, it is emphasized and appreciated that two or more references to “any of the options,” “one option,” or “alternative option” in different parts of this specification do not necessarily all refer to the same option. In addition, specific features, structures, or characteristics may be suitably combined in one or more embodiments of the present invention.

In addition, unless expressly stated in the claims, the order of processing elements and sequences, the use of numeric and alphabetic designations, or the use of other names described in this application are not used to limit the order of procedures and methods in the present invention. Although certain embodiments of the present invention that are found useful today are discussed in the foregoing description with reference to various examples, it should be understood that such details are provided for purposes of illustration only and that the additional claims are not limited to the embodiments discussed. On the contrary, the claims are intended to cover all variations and equivalent combinations falling within the spirit and scope of the embodiments of the present invention. For example, although the system components described above may be implemented as hardware devices, they may also be implemented only through software solutions, such as installing the described system on existing servers or mobile devices.

Likewise, it should be noted that in order to simplify the expressions described in the present invention, and thereby assist in understanding one or more embodiments of the invention, the above description of embodiments of the present invention sometimes contains several features in one embodiment, in the accompanying drawings or in the description. However, this way of presenting the invention does not mean that the object of the present invention requires more features than indicated in the claims. In fact, the number of features of a particular option is less than all the features of one option described above.

Finally, it should be understood that the embodiments discussed herein merely illustrate the principles of the combination of all embodiments of the present invention. Other modifications are also possible within the scope of the present invention. Accordingly, by way of example and not limitation, alternative configurations of embodiments of the present invention may be considered consistent with the teachings of this invention. Accordingly, the embodiments of the present invention are not limited to those explicitly presented and discussed in this application.

Claims (30)

1. A method for determining the status of a bone conduction hearing device, wherein the bone conduction hearing device comprises at least a microphone, a loudspeaker, a feedback analysis module and a signal processing module, the method comprising the steps of: generating, through the loudspeaker, a third sound based on the first signal, the first signal being generated by the signal processing module; the third sound is received via a microphone and a feedback signal is generated; by means of the feedback analysis module, determining the transfer function of the feedback path from the loudspeaker to the microphone based on the feedback signal and the first signal; obtaining at least one predetermined feedback path transfer function; and comparing the feedback path transfer function with said at least one predetermined feedback path transfer function; And determine, by means of the signal processing module, the state of the bone conduction hearing device based on the comparison result, Moreover, at the stage of determining the state of the bone conduction hearing device based on the comparison result: if the feedback path transfer function is a normal feedback path transfer function, it is determined that the state of the bone conduction hearing device is normal; or if the feedback path transfer function is an abnormal feedback path transfer function, it is determined that the state of the bone conduction hearing device is abnormal. 2. The method of claim 1, wherein said at least one predefined feedback path transfer function includes a standard feedback path transfer function and an anomalous feedback path transfer function, the anomalous feedback path transfer function being one or more from the transfer function of the feedback path when worn incorrectly, the transfer function of the feedback path when the structure is abnormal, the transfer function of the feedback path when a foreign body penetrates, and the transfer function of the feedback path when blocked by a foreign body. 3. The method according to claim 2, in which, at the stage of comparing the transfer function of the feedback path with the specified at least one predefined transfer function of the feedback path: determining, from said at least one predefined feedback path transfer function, at least one predefined feedback path transfer function whose difference with the feedback transfer function is within a predetermined threshold range; And determining the type of the feedback path transfer function based on the type of the at least one found predetermined feedback path transfer function. 4. The method of claim 3, wherein in the step of determining the type of the feedback path transfer function based on the type of the at least one found predetermined feedback path transfer function: if the type of the at least one found predetermined feedback path transfer function is a standard feedback path transfer function, it is determined that the feedback path transfer function is a normal feedback path transfer function; or if the type of the at least one found predetermined feedback path transfer function is an anomalous feedback path transfer function, it is determined that the feedback path transfer function is an anomalous feedback path transfer function. 5. The method according to claim 3, in which at the stage of determining, from the specified at least one predefined transfer function of the feedback path, at least one predefined transfer function of the feedback path, the difference of which with the feedback transfer function is within the limits specified threshold range: if the number of transfer functions in the at least one found preset feedback path transfer function is two or more than two, determine the preset feedback path transfer function with the smallest difference as the one found preset feedback path transfer function. 6. The method according to claim 3, additionally containing the steps of: if the type of the at least one found predetermined feedback path transfer function is an incorrectly worn feedback path transfer function, it is determined that the feedback path transfer function is an incorrectly worn feedback path transfer function; or if the type of the at least one found predetermined feedback path transfer function is an abnormal structure feedback path transfer function, it is determined that the feedback path transfer function is an abnormal structure feedback path transfer function; or if the type of the at least one found predetermined feedback path transfer function is a foreign body penetration feedback path transfer function, it is determined that the feedback path transfer function is a foreign body penetration feedback path transfer function; or if the type of the at least one found predetermined feedback path transfer function is a feedback path transfer function when blocked by a foreign body, it is determined that the feedback path transfer function is a feedback path transfer function when blocked by a foreign body. 7. The method of claim 1, further comprising the step of determining the type of abnormal condition of the bone conduction hearing device by: if the feedback path transfer function is the mis-worn feedback path transfer function, determining that the bone conduction hearing device is in the mis-worn state; or if the feedback path transfer function is a feedback path transfer function under an abnormal structure, determining that the bone conduction hearing device is in a state with an abnormal structure; or if the feedback path transfer function is the foreign body penetration feedback path transfer function, determining that the bone conduction hearing device is in a foreign body penetration state; or if the feedback path transfer function is the feedback path transfer function when blocked by a foreign body, determining that the bone conduction hearing device is in a foreign body blocked state. 8. Method according to any one of paragraphs. 1-6, further comprising the step of: adaptively adjust one or more parameters of the bone conduction hearing device or provide reminder information to the user based on the state of the bone conduction hearing device. 9. Method according to any one of paragraphs. 1-6, in which the state of the bone conduction hearing device comprises a normal state and an abnormal state; wherein the abnormal condition comprises one or more of an improperly worn condition, an abnormal structure condition, a foreign body penetration condition, and a foreign body blocking condition.