RU2803713C1 - Systems and methods for obtaining vibration transfer function - Google Patents

Abstract

FIELD: acoustics.

SUBSTANCE: invention relates to methods for measuring the transfer function. The method for obtaining the vibration transfer function contains the steps of: generating a first test audio signal and a second test audio signal by means of a test signal generation unit; generating, by means of an audio signal generating unit, a first audio signal and a second audio signal based on the first test audio signal and the second test audio signal, respectively; outputting, by the detector, a first feedback signal after receiving the first audio signal at the first location, the first feedback signal comprising a signal transmitted from the audio signal generating unit to the first location via a vibration transmission path and via an air conduction transmission path; outputting, by said at least one detector, a second feedback signal after receiving the second audio signal at a second location, wherein the second feedback signal comprises a signal transmitted from the audio signal generation unit to the second location via an air conduction transmission path; the vibration transfer function from the audio signal generating unit to the first location is determined by the feedback signal path determining unit based on the first test audio signal, the second test audio signal, the first feedback signal and the second feedback signal.

EFFECT: simple way to calculate the transfer function of vibration from bone conduction speakers to a microphone.

10 cl, 10 dwg

Description

Field of technology to which the invention relates

The present disclosure relates generally to the field of hearing aid technology and, in particular, to systems and methods for obtaining a vibration transfer function from an audio signal generating unit to other locations.

State of the art

A hearing device (such as a hearing aid) usually has a microphone and a speaker. Some of the sound emitted by the speaker may be picked up by the microphone, resulting in howling or causing the user (eg wearer) to hear an echo while using the hearing aid. To suppress echo or howling, you must minimize the speaker's influence on the microphone (for example, remove the audio signal emitted by the speaker from the signal received by the microphone). Typically, the effect of a speaker on a microphone can be expressed by the transfer function of the feedback signal path between the speaker and the microphone. In a bone conduction hearing aid (such as a bone conduction hearing aid), the sound signal produced by the bone conduction speaker will affect the microphone through vibration conduction and air conduction at the same time. Therefore, the feedback signal paths from the bone conduction speaker to the microphone comprise both an air conduction path and a vibration conduction path. These two transmission paths correspond to different transfer functions from the bone conduction speaker to the microphone. In some scenarios, to improve the assessment of the effect of a bone conduction speaker on a microphone through various transmission paths, especially through a vibration transmission path, it is necessary to provide simple and effective methods and systems for obtaining the vibration transfer function from the bone conduction speakers to the microphone.

Disclosure of the invention

One embodiment of the present disclosure provides a method for obtaining a vibration transfer function from an audio signal generating unit to other locations, the method comprising the steps of: generating, by the test signal generating unit, a first test audio signal and a second test audio signal; generating, by means of an audio signal generating unit, a first audio signal and a second audio signal, respectively, based on the first test audio signal and the second test audio signal; outputting, by at least one detector, a first feedback signal after receiving the first audio signal at a first location, wherein the first feedback signal comprises a signal transmitted from the audio signal generating unit to the first location via a vibration transmission path and via an air conduction transmission path; outputting, by said at least one detector, a second feedback signal after receiving the second audio signal at a second location, wherein the second feedback signal comprises a signal transmitted from the audio signal generating unit to the second location via an air conduction transmission path; the vibration transfer function from the audio signal generating unit to the first location is determined by the feedback signal path determining unit based on the first test audio signal, the second test audio signal, the first feedback signal and the second feedback signal.

In some embodiments, the first test tone or the second test tone comprises a white noise signal, a tone tone, a pulse signal, a narrowband noise, a linear frequency modulated narrowband signal, a modulated audio signal, or a frequency sweep audio signal.

In some embodiments, the at least one detector comprises an air conduction microphone.

In some embodiments, the audio signal generating unit is mounted on the device, the at least one detector is rigidly or elastically coupled to the device at a first location, and the audio signal generating unit is located in the device.

In some embodiments, the at least one detector is located remote from the device at a second location, and the second location is proximate to the first location.

In some embodiments, the at least one detector includes a first microphone and a second microphone, the first microphone located at a first location and the second microphone located at a second location.

In some embodiments, the step of determining the vibration transfer function from the audio generating unit to the first location based on the first test audio signal, the second test audio signal, the first feedback signal, and the second feedback signal: determines the first transfer function of the feedback signal path from a unit for generating sound signals to the first place based on the first test sound signal and the first feedback signal; determining a second transfer function of the feedback signal path from the audio signal generating unit to the second location based on the second test audio signal and the second feedback signal; and determining a vibration transfer function from the audio signal generation unit to the first location based on the first feedback signal path transfer function and the second feedback signal path transfer function.

In some embodiments, the step of determining a first transfer function of a feedback signal path based on the first test audio signal and the first feedback signal: obtains a first converted test audio signal and a first converted feedback signal by converting the first test audio signal and the first feedback signal, respectively communications; and determining a first transfer function of the feedback signal path from the audio signal generating unit to the first location based on the first converted test audio signal and the first converted feedback signal.

In some embodiments, the step of determining a second transfer function of the feedback signal path based on the second test audio signal and the second feedback signal: obtains a second converted test audio signal and a second converted feedback signal by converting the second test audio signal and the second feedback signal, respectively communications; and determining a second transfer function of the feedback signal path from the audio signal generation unit to the second location based on the second converted test audio signal and the second converted feedback signal.

In some embodiments, in the step of determining the vibration transfer function from the audio generating unit to the first location based on the first test audio signal, the second test audio signal, the first feedback signal, and the second feedback signal: determining the vibration feedback signal from the audio generating unit signals to the first location based on the first feedback signal and the second feedback signal; and determining a vibration transfer function from the audio signal generation unit to the first location based on the first test audio signal, the second test audio signal and the vibration feedback signal.

In some embodiments, in the step of determining the vibration transfer function from the audio generating unit to the first location, based on the first test audio signal, the second test audio signal, and the vibration feedback signal: a first converted test audio signal, a second converted test audio signal, and a converted a vibration feedback signal by converting the first test audio signal, the second test audio signal and the vibration feedback signal, respectively; and determining a first transfer function of the feedback path from the audio signal generating unit to the first location based on the first converted test audio signal, the second converted test audio signal, and the converted vibration feedback signal.

One embodiment of the present disclosure provides a system for obtaining a vibration transfer function from an audio signal generating unit to other locations, the system comprising a test signal generating unit, at least one detector, and a feedback signal path determining unit. The test signal generation unit is configured to generate a first test audio signal and a second test audio signal. The at least one detector is configured to output a first feedback signal after receiving a first audio signal at a first location and output a second feedback signal after receiving a second audio signal at a second location, wherein the first feedback signal comprises a signal transmitted from an audio generation unit. signals to the first place through a vibration transmission path and an air conduction transmission path, the second feedback signal comprising a signal transmitted from the audio signal generation unit to the second place through the air conduction transmission path, the first audio signal is generated by the audio signal generation unit based on the received first test sound signal, and the second sound signal is generated by the sound signal generating unit based on the received second test sound signal. The feedback signal path determination unit is configured to determine the vibration transfer function from the audio signal generation unit to the first location based on the first test audio signal, the second test audio signal, the first feedback signal and the second feedback signal.

In some embodiments, the at least one detector comprises an air conduction microphone.

In some embodiments, the audio signal generating unit is mounted on the device, the at least one detector is rigidly or elastically coupled to the device at a first location, and the audio signal generating unit is located in the device.

In some embodiments, the at least one detector is located away from the device at a second location, and the second location is proximate to the first location.

In some embodiments, the at least one detector includes a first microphone and a second microphone, the first microphone located at a first location and the second microphone located at a second location.

In some embodiments, determining the vibration transfer function from the audio generating unit to the first location based on the first test audio signal, the second test audio signal, the first feedback signal, and the second feedback signal comprises: determining the first feedback signal transfer function from the audio generating unit sound signals to the first place based on the first test sound signal and the first feedback signal; determining a second transfer function of the feedback signal from the audio signal generation unit to the second location based on the second test audio signal and the second feedback signal; and determining a vibration transfer function from the audio signal generation unit to the first location based on the first feedback signal path transfer function and the second feedback signal path transfer function.

In some embodiments, determining a first transfer function of a feedback signal path based on the first test audio signal and the first feedback signal comprises: obtaining the first converted test audio signal and the first converted feedback signal by converting the first test audio signal and the first feedback signal, respectively ; and determining a first transfer function of the feedback signal from the audio signal generation unit to the first location based on the first converted test audio signal and the first converted feedback signal.

In some embodiments, determining a second feedback signal path transfer function based on the second test audio signal and the second feedback signal comprises: obtaining a second transformed test audio signal and a second transformed feedback signal by transforming the second test audio signal and the second feedback signal, respectively ; determining a second transfer function of the feedback signal from the audio signal generation unit to the second location based on the second converted test audio signal and the second converted feedback signal.

In some embodiments, determining the vibration transfer function from the audio generating unit to the first location based on the first test audio signal, the second test audio signal, the first feedback signal, and the second feedback signal comprises: determining the vibration feedback signal from the audio generating unit to the first place based on the first feedback signal and the second feedback signal; and determining a vibration transfer function from the audio generating unit to the first location based on the first test audio signal, the second test audio signal and the vibration feedback signal.

In some embodiments, determining the vibration transfer function from the audio generating unit to the first location based on the first test audio signal, the second test audio signal, and the vibration feedback signal comprises: obtaining the first transformed test audio signal, the second transformed test audio signal, and the transformed signal providing vibration feedback by converting the first test audio signal, the second test audio signal, and the vibration feedback signal, respectively; and determining a first transfer function of the feedback signal from the audio signal generating unit to the first location based on the first converted test audio signal, the second converted test audio signal, and the converted vibration feedback signal.

One embodiment of the present disclosure provides a system for obtaining a vibration transfer function from an audio signal generating unit to other locations, the system comprising a test audio signal generation module and a processing module. The module for generating test audio signals is configured to generate a first test audio signal and a second test audio signal. The processing module is configured to determine a vibration transfer function from the audio signal generating unit to the first location based on a first test audio signal, a second test audio signal, a first feedback signal, and a second feedback signal, wherein the first feedback signal comprises a signal transmitted from the unit generating sound signals to the first place through the vibration transmission path and through the air conduction transmission path, the second feedback signal comprises a signal transmitted from the sound signal generating unit to the second place through the air conduction transmission path, the first feedback signal is output by at least one detector after receiving the first audio signal at the first location, the second feedback signal is generated by the said at least one detector after receiving the second audio signal at the second location, the first audio signal is generated by the audio signal generating unit based on the first test audio signal, and the second audio signal is generated by the generating unit beeps based on the second test beep.

One embodiment of the present disclosure provides a computer-readable medium, wherein the medium stores computer instructions that, when the computer reads computer instructions contained on the medium, cause the computer to: generate a first test tone and a second test tone; determining a vibration transfer function from the audio signal generation unit to the first location based on the first test audio signal, the second test audio signal, the first feedback signal, and the second feedback signal, wherein the first feedback signal comprises a signal transmitted from the audio signal generation unit to the first places through the vibration transmission path and through the air conduction transmission path, the second feedback signal comprises a signal transmitted from the audio signal generating unit to the second place through the air conduction transmission path; a first feedback signal is output by at least one detector after receiving a first audio signal at a first location, a second feedback signal is output by said at least one detector after receiving a second audio signal at a second location, the first audio signal is generated by an audio signal generating unit based on the first test sound signal, and the second sound signal is generated by the sound signal generating unit based on the second test sound signal.

Brief description of drawings

The present application will now be presented in the form of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting. In these embodiments, the same number represents the same structure, where:

fig. 1 is a transfer function detection system application scenario corresponding to some embodiments of the present disclosure;

fig. 2 is an exemplary flowchart for obtaining a vibration transfer function corresponding to some embodiments of the present disclosure;

fig. 3 is an exemplary diagram of a vibration transfer function acquisition system module corresponding to some embodiments of the present disclosure;

fig. 4 is a diagram of a transfer function detection system when at least one detector is at a first location, corresponding to some embodiments of the present disclosure;

fig. 5 is a diagram of a transfer function detection system when at least one detector is at a second location, corresponding to some embodiments of the present disclosure;

fig. 6 is a plot of a first feedback signal path transfer function corresponding to some embodiments of the present disclosure;

fig. 7 is a plot of a second feedback signal path transfer function corresponding to some embodiments of the present disclosure;

fig. 8 is a graph of a vibration transfer function corresponding to some embodiments of the present disclosure;

fig. 9 is an exemplary flowchart for detecting the status of a bone conduction hearing device corresponding to some embodiments of the present disclosure; And

fig. 10 is an exemplary diagram of a bone conduction hearing device status detection system module corresponding to some embodiments of the present disclosure.

Carrying out the invention

To more clearly explain the technical outline of the embodiments of the present disclosure, drawings used in describing the embodiments will now be briefly presented. It will be appreciated that the drawings in the following description are only some examples or embodiments of the present disclosure. Without creative effort, the present disclosure may also be applied to other similar scenarios in accordance with these drawings by those skilled in the art. Unless otherwise obvious from the textual explanation or otherwise indicated, the same markings on a drawing represent the same structure or operation.

It should be understood that the terms "system", "device", "unit" and/or "module" as used herein are a way of distinguishing between various components, elements, components, parts or assemblies at different levels. However, if other words are suitable for the same purpose, such other expressions may be substituted.

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

Flowcharts are used in the present disclosure to explain an operation performed by a system corresponding to an embodiment of the present disclosure. It should be understood that the preceding or subsequent operations are not necessarily performed in exactly the specified 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 remove one or more operations from these procedures.

For ease of explanation, the following describes the process of using and applying the audio signal generating unit, using a bone conduction speaker, or speaker for short, as an example. It should be noted that the above description is presented for illustrative purposes only and is not intended to limit the scope of protection of the present disclosure.

Below, without loss of generality, the descriptions of “bone conduction hearing device,” “bone conduction hearing aid,” “bone conduction speaker,” “speaker,” or “bone conduction earphone” will be used in this disclosure when describing technology related to with bone conduction. The descriptions are only exemplary applications of bone conduction methods. For those of ordinary skill in the art, "speaker" or "earphone" may also be replaced by other similar words such as "player", "hearing aid", etc. In fact, the various implementation methods presented in the present disclosure can be easily applied to other hearing devices other than speakers. For example, those skilled in the art, after understanding the basic operating principle of the bone conduction speaker, can make various modifications and changes in the forms and details of specific methods and steps for implementing the bone conduction speaker without deviating from the principle. In particular, the function of sensing and processing environmental sound signals can be added to the bone conduction speaker to make the speaker realize the function of a hearing aid. For example, microphones, such as micromics, can sense an audio signal from the environment around the user/wearer, process the audio signal using a specific algorithm(s), and transmit the processed audio signal (or generated electrical signal) to a bone conduction speaker. That is, the bone conduction speaker can be modified to add the function of sensing environmental sounds, and after some signal processing, the sound signal can be transmitted to the user/owner through the bone conduction speaker to realize the function of a bone conduction hearing aid. For example, the algorithm(s) mentioned herein may comprise one or more combinations of noise reduction, automatic gain control, acoustic feedback suppression, wide dynamic range compression, active environment recognition, active noise reduction, directional processing, tinnitus processing algorithms. , multi-channel wide dynamic range compression, active howling suppression, 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 speaker may be picked up by the microphone, resulting in howling, or cause the user (eg, wearer) to hear an echo while using the hearing device. To suppress echo or howling, you must minimize the influence of the speaker on the microphone (for example, remove the sound signal emitted by the speaker from the signal received by the microphone). Typically, the effect of a speaker on a microphone can be expressed by the transfer function of the feedback signal between the speaker and the microphone. In some embodiments, in a bone conduction hearing device (eg, a bone conduction hearing aid), the audio signal generated by the bone conduction speaker may influence the microphone through vibration conduction and air conduction simultaneously. Therefore, the feedback from the bone conduction speaker to the microphone contains both an air transmission path and a vibration transmission path. These two transmission paths correspond to different transfer functions from bone conduction speakers to microphones. In some scenarios, it is necessary to better evaluate the effect of the bone conduction speaker on the microphone through various 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 disclosure provide a method of obtaining a vibration transfer function from a bone conduction speaker to other locations (eg, to a location where a microphone is located that couples to the bone conduction speaker through a housing). One or more detectors receive a first audio signal at a first location and a second audio signal at a second location. The first audio signal may be transmitted through an air conduction transmission path and through a vibration transmission path. The second audio signal can only be transmitted through an air conduction transmission path. In this way, the vibration transfer function is determined and the testing method becomes more efficient and easier to operate.

In fig. 1 schematically illustrates an application scenario for a transfer function detection system corresponding to some embodiments of the present disclosure. For convenience of description, the transfer function detection 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 any means of communication and/or connections, including wireless connections, wired connections, or any combination of these connections, that transmit and/or receive data. In some embodiments, system 100 may be used to obtain a vibration transfer function for a bone conduction hearing device and detect the condition of the bone conduction hearing device.

In some embodiments, wired connections may be made using, for example, metallic cable, optical cable, or mixed metallic and optical cables, such as coaxial cable, bonded cable, flexible cable, coiled cable, non-metallic braided cable, metallic braided cable, stranded cable. cable, twisted pair cable, ribbon cable, shielded cable, telecommunications cable, twisted pair cable, parallel twisted pair conductor and twisted pair.

The examples described above are for convenience of explanation only. Wired connections can be made using any other type of transmission medium, such as a carrier for transmitting electrical signals or optical signals. Wireless connections may include, but are not limited to, radio communications, free space optical communications, acoustic communications, electromagnetic induction, etc. Radio communications may use, but are not limited to, IEEE302.11 series standards, IEEE 302.15 series standards (e.g. Bluetooth technology and Purple Bee technology), first generation mobile technology, second generation mobile technology (e.g. 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 (eg GPS technology), near field communication (NFC) and other technologies operating in the ISM frequency band (eg 2.4 GHz). Free space optical communications may contain, but are not limited to, visible light, infrared signals, etc. Acoustic communication may include, but is not limited to, sound waves, ultrasonic signals, etc. Electromagnetic induction may include, but is not limited to, near field communication technology. The examples described above are provided for convenience only. The wireless connection medium may also be of other types, such as Z-wave technology, other toll civilian radio bands, and military radio bands.

In some embodiments, the hearing device 120 may typically include an air conduction speaker and a bone conduction speaker. In some embodiments, the hearing device 120 may include a bone conduction speaker (e.g., 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 located 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 a specific location of interest for the hearing device 120 (e.g., location 123 as shown in FIG. 1 and Fig. 4). It should be understood that the particular location of interest may be the location of a microphone (e.g., a microphone actually mounted on the hearing aid 120) or any location within or outside the hearing aid 120 (e.g., any location of the hearing aid 120 that is rigidly or resiliently coupled to microphone 122 with bone conduction).

In some embodiments, at least one detector 110 may receive an audio signal emitted by bone conduction speaker 122 and then may generate a feedback signal based on the audio signal. The feedback signal may reflect the influence of the bone conduction speaker 122 on the at least one detector 110 (or on the location of the at least one detector 110). For example, the feedback signal may be sent to processor 140, and then processor 140 may determine a transfer function of the feedback signal from bone conduction speaker 122 to at least one detector 110 based on the feedback signal. In some embodiments, at least one detector 110 may also receive an environmental audio signal and generate an audio signal based on the audio signal. The environmental audio signal may include, for example, human speech, vehicle sounds, environmental noise, etc. In some embodiments, the at least one detector 110 may send an audio signal to the bone conduction speaker 122 and the processor 140 and the bone conduction speaker 122 may generate an audio signal based on the audio signal. In some embodiments, at least one detector 110 may send an audio signal to the processor 140, then the processor 140 may send the audio signal to the bone conduction speaker 122, and the bone conduction speaker 122 may generate an audio signal based on the audio signal. In some embodiments, at least one detector 110 may include an electroacoustic transducer, such as a microphone. For example, the microphone may include 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, etc. or any combination thereof. As another example, the microphone may comprise an omnidirectional microphone, a unidirectional microphone, a bidirectional microphone, a cardioid microphone, etc. 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 disclosure describes a microphone as the 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 a microphone senses the audio signal emitted by the bone conduction speaker 122, and thus determine the transfer function of the feedback signal from the bone conduction speaker 122 to the microphone. In some embodiments, processor 140 may be a single server or groups of servers. Server groups 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 directly couple 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 unit 141 and a feedback signal path determination unit 142 (as shown in FIG. 4 and FIG. 5). The test signal generation unit 141 may transmit the test tone (eg, the first test tone) to the bone conduction speaker 122 and the feedback signal path determining unit 142. The bone conduction speaker 122 may generate an audio signal (eg, a first audio signal) based on the test audio signal. After receiving the sound emitted by the bone conduction speaker 122, at least one detector 110 may generate a feedback signal (eg, a first feedback signal) based on the audio signal, and send the feedback signal to the feedback signal path determining unit 142 and feedback signal path determining unit 142 may determine a transfer function of the feedback signal based on the test audio signal and the feedback signal received from the output of at least one detector 110. In some embodiments, based on the feedback signal transmitted as through the air conduction transmission path and through the vibration transmission path, and based on the test audio signal corresponding to the feedback signal, the feedback signal path determining unit 142 can determine the corresponding transfer function of the feedback signal (i.e., the first transfer function of the feedback signal). Based on the feedback signal transmitted only through the air conduction transmission path and the test audio signal corresponding to the feedback signal, the feedback signal path determining unit 142 can determine the corresponding transfer function of the feedback signal (i.e., the second transfer function feedback signal). In some embodiments, feedback signal path determination unit 122 may determine a vibration transfer function based on two previously determined feedback signal transfer functions.

In some embodiments, processor 140 may also include a feedback analysis unit and a signal processing unit. In some embodiments, processor 140 may determine a transfer function of a feedback signal from the bone conduction speaker 122 of the bone conduction hearing device to 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 feedback transfer function determined in real time with other defined feedback transfer functions to determine the status of the bone conduction hearing device in real time.

Database 130 may store data, commands, and/or any other information, such as the first feedback signal transfer function described above. In some embodiments, database 130 may store data received from at least 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 execute or use to implement the exemplary methods described in this disclosure. In some embodiments, the database 130 may include mass memory, removable memory, volatile read-write memory, read-only memory (ROM), etc. or any combination thereof. 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 may access data stored in the database 130 (e.g., the first transfer function of the feedback signal path). In some embodiments, the database 130 may be part of the processor 140.

In fig. 2 is an exemplary flowchart of a process for obtaining a vibration transfer function corresponding to some embodiments of the present disclosure. Specifically, process 200 may be executed by system 100 (eg, processor 140). For example, process 200 may be stored in a storage device (eg, database 130) in the form of a program or instruction, and process 200 may be implemented when system 100 (eg, processor 140) executes the program or instructions.

At step 210, the first test tone and the second test tone may be generated by the test tone generating unit 141. In some embodiments, step 210 may be performed by test tone generation module 310.

In some embodiments, test signal generating unit 141 may be a signal source capable of generating and outputting electrical signals with certain characteristics. For example, the first test audio signal or the second test audio signal may comprise a white noise signal, a tone audio signal, a pulse signal, a narrowband noise signal, a linear frequency modulation narrowband signal, a modulated audio signal, and/or a frequency sweep audio signal. When an audio signal conditioner (eg, bone conduction speaker 122) receives a white noise signal, the audio signal conditioner can generate noise with the same energy density at all frequencies, that is, white noise. When the generating device receives an audio tone, the audio generating device can produce a single audio signal, that is, an audio tone. When the generating device receives a frequency-swept audio signal, the audio signal generating device can produce an audio signal with a frequency continuously changing from high to low (or from low to high) in a certain frequency band, that is, a frequency-swept audio signal.

In some embodiments, the first test tone and the second test tone may be signals sequentially generated by the test tone generating unit 141 at different times and used, respectively, to test the equipment to be tested. In some embodiments, to maintain compatibility between the two test conditions, the first test tone and the second test tone may be exactly the same, that is, the type and frequency of the first test tone and the second test tone may be the same. For example, the first test tone and the second test tone may be identical frequency scan signals. In some embodiments, the type of the first test tone and the type of the second test tone may be different. For example, the first test tone may be a white noise signal and the second test sound may be a tone tone.

In some alternative embodiments, equipment testing using the first test tone and equipment testing using the second test tone may be performed simultaneously at one time. In this case, the test tone generation unit 141 may generate only one test tone, for example, only the first test tone or only the second test tone, which may be intended for the testing purpose. Additional descriptions can be found in the corresponding descriptions of step 230.

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

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

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

In some embodiments, the first audio signal and the second audio signal may be generated sequentially by the same bone conduction speaker 122 at the same location on the same hearing device 120. In such cases, by varying the position of the microphone, the effect of the audio may be determined. emitted by the bone conduction speaker 122 at various locations to obtain a transfer function corresponding to the acoustic paths of the audio signal. In other embodiments, the bone conduction speaker 122 may comprise two bone conduction speakers 122 of the same design and materials, and the two bone conduction speakers 122 may generate a first audio signal and a second audio signal based on the first test audio signal and the second test audio signal. signal, respectively.

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

The at least one detector may receive an audio signal and generate a first feedback signal based on the first audio, receive a second audio signal and generate a second feedback signal, and send the first feedback signal and the second feedback signal to a feedback signal path testing device. (for example, to block 142 for determining the path of the feedback signal).

For ease of description, the following description uses as an example at least one detector comprising an air conduction microphone (eg, the microphone in FIG. 4 and FIG. 5). The microphone may at a first location receive the first audio signal 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 (that is, the bone conduction speaker 122 may be rigidly or resiliently coupled to the hearing device 120) and the first location may be another location proximal to the hearing device 120 (such as housing 121 in Fig. 1 or Fig. 4). When the microphone is at the first location, the microphone may be rigidly or resiliently coupled to the hearing device 120. According to the principle of the bone conduction speaker 122 producing an audio signal, when the bone conduction speaker 122 generates the first audio signal, the bone conduction speaker 122 may cause the hearing aid 120 (body) vibrates, and the vibration of the hearing aid 120 may be transmitted to a microphone proximal to the hearing aid 120. For example, as shown in FIG. 4, the first location may be a location 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 may also vibrate the surrounding air when producing the first audio signal, and the vibration of the air may be transmitted to the microphone in the form of air conduction. Therefore, the first sound signal can be transmitted to the microphone by vibration conduction and air conduction simultaneously. In other words, the first method presented above may include conduction by vibration and conduction by air.

In some embodiments, the microphone may generate a first feedback signal based on the first audio signal transmitted through the above two transmission paths, and the microphone may send the first feedback signal to the feedback path determining unit 142 and/or store it in the device. storage (for example, in the database 130).

Likewise, the microphone may receive in a second manner at a second location a second audio signal transmitted by the bone conduction speaker 122. For example, the second location may not be in contact with the hearing aid 120 (housing 121) but may be adjacent to the first location. When the microphone is located at the second location, the microphone may be considered suspended relative to the hearing aid 120. Alternatively, the second location may be located inside or outside the hearing aid 120 until the microphone is rigidly or resiliently coupled to the hearing aid 120 at its location. For example, as shown in FIG. 5, since the microphone is not in contact with the body 121 when at the second location, the microphone diaphragm can only receive the sound signal transmitted through air and is not affected by the vibration of the body 121. Therefore, the second sound signal can be transmitted to the microphone only through air conduction. In other words, the second method mentioned above can only contain air conduction. In some embodiments, the microphone may generate a second feedback signal based on the second audio signal transmitted through the air conduction transmission path, and the microphone may send the second feedback signal to the feedback signal path determining unit 142 and/or store it in the device. storage (for example, in the database 130). It should be understood that when the distance between the second site and the first site is very small (for example, less than 1 mm, 5 mm, 1 cm, 5 cm), the air conduction transmission path from the bone conduction speaker 122 to the first site may be approximately considered to be coincides with the air conduction transmission path from the bone conduction speaker 122 to the second location.

In some alternative embodiments, when the microphone is in the first location and the vibration direction of the housing 121 is vertical relative to the vibration direction of the microphone diaphragm, the vibration of the housing 121 cannot cause vibration of the vibrating portions (eg, the diaphragm) of the microphone. In such cases, it can be assumed that the microphone can only receive the sound signal transmitted through the air at the first location. Therefore, the process of placing a microphone at a second location away from the housing 121 to obtain a second audio signal can be replaced by adjusting the orientation of the microphone so that when the microphone is at the first location, the direction of vibration of the diaphragm can be vertical with respect to the vibration direction of the housing 121. Since the vibration of the housing 121 does not affect the diaphragm, even if the microphone is close to the body 121, the second sound signal that the microphone receives can only be transmitted through air conduction. Therefore, when the vibration direction of the microphone diaphragm is vertical with respect to the vibration direction of the housing 121, only the air conduction feedback signal transfer function may have to be considered when determining the feedback signal path transfer function. It should be understood that when the bone conduction speaker 122 respectively generates the first audio signal and the second audio signal, it may only be necessary to set the vibration direction of the microphone diaphragm at the first location to be parallel or vertical with respect to the vibration direction of the housing 121. The microphone may then output the first a feedback signal and a second feedback signal, respectively, in accordance with the received first audio signal and the second audio signal.

In some embodiments, the at least one detector (eg, an air conduction microphone or a microphone) may comprise a first detector (eg, a first air conduction microphone) and a second detector (eg, a second air conduction microphone) of the same designs and materials. In some embodiments, the at least one detector (eg, an air conduction microphone or microphone) may comprise a first detector (eg, a silicone microphone) and a second detector (eg, an electret microphone) of different designs and materials. In some embodiments, the microphone may be an air conduction microphone or a bone conduction microphone. For ease of understanding, the present disclosure describes an air conduction microphone. A first detector may be located at a first location to receive a first audio signal and a second detector may be located at a second location to receive a second audio signal. Similar to the above embodiments, the first detector may output a first feedback signal upon receiving the first audio signal, and the second detector may output a second feedback signal upon receiving the second audio signal.

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

At step 240, the feedback signal path determining unit 142 may determine a vibration transfer function from the bone conduction speaker 122 to the first location based on the first test audio signal, the second test audio 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, after receiving the first feedback signal and the second feedback signal from the microphone output, the feedback signal path determining unit 142 may determine a transfer function of the feedback signal based on the first test audio signal, the second test audio signal, the first feedback signal. and a second feedback signal, in accordance with the principle of measuring the transfer function of the feedback signal path. In some embodiments, the feedback signal path determining unit 142 may receive the first test audio signal from the test signal generating unit 141. In some embodiments, after receiving the first test audio signal and the first feedback signal, the feedback signal path determination unit 142 may determine a first transfer function of the first audio feedback signal transmitted from the bone conduction speaker 122 to the first location based on the first test audio signal. signal and on the first feedback signal. For example, the feedback signal path determining unit 142 may convert the first test audio signal to obtain a first converted test audio signal and convert the first feedback signal to generate a first converted feedback signal. In some embodiments, feedback signal path determination unit 142 may transform the first test audio signal and the first feedback signal using a Z-transform. For example, the first test tone inputted by the bone conduction speaker 122 may be converted into a first converted test tone using a Z-transform, and the first feedback signal from the output of the air conduction microphone may be converted into a first converted feedback signal using Z-transforms. In some embodiments, the transformation may be performed using a Fourier transform method, a Laplace transform method, a linear prediction encoder, or another decision method also based on a speech model, etc.

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

For illustration, the feedback signal path determining unit 142 can obtain the first feedback signal transfer function through Formula (1) below based on the first converted test audio signal and the first converted feedback signal:

… (1)

where Y ₁ (z) is the first converted test audio signal, X ₁ (z) is the first converted feedback signal, F ₁ (z) is the first transfer function of the feedback signal path. As mentioned above, the first feedback signal transmission function F ₁ (z) may indicate the influence of the air conduction transmission path and the vibration transmission path from the bone conduction speaker 122 to the first location.

In some embodiments, the feedback signal path determining unit 142 may receive a second test audio signal from the test signal generating unit 141. In some embodiments, after receiving the second test audio signal and the second feedback signal, the feedback signal path determination unit 142 may determine a second transfer function of the second audio feedback signal transmitted from the bone conduction speaker 122 to the second location based on the second test audio signal. signal and a second feedback signal. For example, the feedback signal path determining unit 142 may convert the second test audio signal and the second feedback signal, respectively, to obtain a second converted test audio signal and a second converted feedback signal. In some embodiments, feedback signal path determination unit 142 may transform the second test audio signal and the second feedback signal using a Z-transform. For example, a second test audio signal produced by bone conduction speaker 122 may be converted to a second transformed test audio signal using a Z-transform, and a second feedback signal generated by a microphone may be converted to a second transformed feedback signal using a Z-transform. transformations.

Likewise, for purposes of illustration, the feedback signal path determining unit 142 may obtain the second feedback signal transfer function through formula (2) based on the second transformed test audio signal and the second transformed feedback signal:

… (2)

where Y ₂ (z) is the second converted test audio signal, X ₂ (z) is the second converted feedback signal, F ₂ (z) is the second transfer function of the feedback signal. As mentioned above, the second feedback signal transmission function F ₂ (z) may only comprise the influence of the air conduction transmission path between the bone conduction speaker 122 and the second site (or first site).

By solving formula (1) and formula (2) presented above, the feedback signal path determining unit 142 can determine the first feedback signal transfer function corresponding to the first audio signal transmitted along the air conduction transmission path and the vibration transmission path, and determine a second feedback signal transfer function corresponding to the second audio signal transmitted through the air conduction transmission path, and then the vibration transfer function from the bone conduction speaker 122 to the first location can be determined through subsequent analysis.

In some embodiments, the feedback signal path determination unit 142 may determine the vibration transfer function from the bone conduction speaker 122 to the first location based on the first feedback path transfer function F ₁ (z) and the second function F ₂ ( z) transmission along the path of the feedback signal.

Specifically, since the first transmission path of the first audio signal received by the microphone at the first location may comprise an air conduction transmission path, and the vibration transmission path and the second transmission path of the second audio signal received by the microphone at the second location may only comprise a transmission path through air conduction, the output signals of the air conduction microphone (ie, the first feedback signal and the second feedback signal) may be different.

For purposes of illustration, a first feedback signal transfer function comprising an air conduction transmission path and a vibration transmission path can be expressed as follows:

F ₁ (z) = A ₁ (z) + B ₁ (z) ... (3)

where A ₁ (z) is the transfer function of the air conduction feedback signal from the bone conduction speaker 122 to the first location, B ₁ (z) is the vibration transfer function from the bone conduction speaker 122 to the first location.

In fig. Figure 6 shows a graph of the first function F ₁ (z) of the feedback signal transmission, defined by formula (3).

In some embodiments, assuming a short distance between the second location and the first location, the air conduction transmission path from the bone conduction speaker 122 to the second location can be considered approximately equivalent to the air conduction transmission path from the bone conduction speaker 122 to the first location. Therefore, the transfer function of the second feedback signal path, containing only the air conduction transmission path, can be expressed as follows:

F ₂ (z) = A ₂ (z) ... (4),

where A ₂ (z) is the transfer function of the air conduction feedback signal from the bone conduction speaker 122 to the second location, and the function A ₂ (z) may be the same or approximately the same as the transfer function of the feedback signal along the c path air conduction from speaker 122 with bone conduction to the first place. In fig. 7 shows a graph of the second transfer function of the feedback signal path defined by formula (2). As mentioned above, the second feedback signal transfer function may only indicate the influence of the air conduction transmission path between the bone conduction speaker 122 and the second site (or first site).

In some embodiments, the feedback signal path determination unit 142 may determine a vibration transfer function from the bone conduction speaker 122 to the first location based on the first feedback signal transmission function F ₁ (z) and the second signal transmission function F ₂ (z) feedback. Specifically, since the second feedback signal transmission function F ₂ (z) contains only the air conduction feedback signal transfer function, and the first feedback signal path transmission function F ₁ (z) contains the feedback signal transmission function A ₁ (z) communication through air conduction and the transmission function B ₁ (z) through vibration, then to determine the vibration transfer function, the feedback signal path determining unit 142 can subtract formula (4) from formula (3):

B ₁ (z) = F ₁ (z) – F ₂ (z) ... (5)

In fig. 6 is a graph of a first transfer function of a feedback signal path comprising an air conduction transmission path and a vibration transmission path. Graph in Fig. 6 shows a situation in which a first audio signal received at a first location is transmitted through both an air conduction transmission path and a vibration transmission path at different frequencies. It can be seen that in the range of approximately 1000 Hz (for example, 600 Hz - 1000 Hz), the influence of the bone conduction speaker in the first place through the air conduction transmission path and through the vibration transmission path has a trough (i.e., the influence is small) relatively other frequency ranges; In the range of 300 Hz - 400 Hz and 2000 Hz - 3000 Hz, the influence of the bone conduction speaker in the first place simultaneously through the air conduction transmission path and through the vibration transmission path has a peak (i.e., the influence is large) relative to other frequency ranges.

In fig. 7 is a graph of a second transfer function of a feedback signal path comprising only an air conduction transmission path. The graph in Fig. 7 reflects a situation in which a second audio signal received at a second location is transmitted only through an air conduction transmission path at different frequencies. When the frequency is in the range of 0 Hz - 1000 Hz, the bone conduction speaker can have little influence on the second place through the air conduction transmission path. When the frequency is in the range of 1000 Hz - 3000 Hz, the bone conduction speaker can have a greater influence on the second place through the air conduction transmission path. In some embodiments, when the second feedback signal transfer function in FIG. 7 is subtracted from the first feedback signal 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 areas with frequencies ranging from 0 Hz to 1000 Hz and less influence in areas with frequencies above 1000 Hz. Based on FIG. 6, fig. 7 and fig. 8, it can be seen that the effect of the bone conduction speaker at the first place through the vibration transmission path can be mainly concentrated in the low frequency range (for example, less than 1000 Hz), while the effect of the bone conduction speaker at the first place (or at a second location) through the transmission path by air conduction may be concentrated mainly in the high frequency range (eg, greater than 1000 Hz).

In some embodiments, the feedback signal path determining unit 142 may determine the vibration feedback signal path from the bone conduction speaker 122 to the first location based on the first feedback signal and the second feedback signal.

For purposes of illustration, the feedback signal path determining unit 142 may obtain the vibration feedback signal based on the first feedback signal and the second feedback signal using the following 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, the feedback signal path determination unit 142 may determine the vibration transfer function from the bone conduction speaker 122 to the first location based on the first test audio signal, the second test audio signal, and the vibration feedback signal.

In some embodiments, the feedback signal path determining unit 142 may convert the first test tone, the second test tone, and the vibration feedback signal, respectively, to obtain a first transformed test tone, a second transformed test tone, and a transformed feedback signal. by vibration. For example, the first test tone Y ₁ may be converted to produce a first transformed test tone Y ₁ (z) using a Z transform, the second test tone Y ₂ may be converted to produce a second transformed test tone Y ₂ (z) using the Z transform, the second test audio signal X _d can be converted to obtain a second transformed test audio signal X _d (z) using the Z transform.

In some embodiments, the feedback signal path determining unit 142 may determine a first function of the feedback signal path from the audio generating unit to the first location based on the first converted test audio signal, the second converted test audio signal, and the converted vibration feedback signal. . Namely, the feedback signal path determining unit 142 may determine an average value or a weighted average of the first converted test audio signal and the second converted test audio signal to obtain the average converted test audio signal.

For purposes of explanation, the feedback signal path determining unit 142 may obtain the average transformed test tone based on the first transformed test tone and the second transformed test tone using formula (7):

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

where Y ₁ (z) is the first converted test audio signal, Y ₁ (z) is the second converted test audio signal, Y _d (z) is the average converted test audio signal.

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

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

… (8),

where Y _d (z) is the average converted test sound signal, X _d (z) is the converted vibration feedback signal, B ₁ (z) is the vibration transfer function.

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

It should be noted that the above descriptions are presented for illustrative purposes only and are not intended to limit the scope of protection of the present disclosure. Numerous changes and modifications may be made by those skilled in the art based on the contents of the present disclosure. The functions, structures, methods, and other features of the exemplary embodiments described herein may be combined in various ways to provide additional and/or alternative exemplary embodiments. For example, the feedback signal path determination block 142 may comprise a first determination block and a second determination block, wherein the first determination block may be configured to determine a first feedback signal path transfer function for the first feedback signal path, and a second determination block can be used to determine a second transfer function of the feedback signal path. However, these changes and modifications do not depart from the scope of this disclosure.

In fig. 3 is an exemplary diagram of a vibration transfer function acquisition system module corresponding to certain embodiments of the present disclosure. The vibration transfer function obtaining system 300 may be briefly referred to as system 300. As shown in FIG. 3, system 300 may include a test tone 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 signal generation module 310 may be configured to generate a first test audio signal and a second test audio signal. In some embodiments, the first test tone or the second test tone may comprise at least one of white noise, a tone tone, a pulse tone, a narrowband noise, a linear frequency modulated narrowband signal, a modulated audio signal, and/or signal with audio scanning. In some embodiments, the types and frequencies of the first test tone and the second test tone may be the same, for example, the first test tone and the second test tone may be tones of the same frequency. In some embodiments, the type of the first test tone and the type of the second test tone may be different. For example, the first test tone may be white noise and the second test tone may be a tone. In some embodiments, test tone generation module 310 may generate only one test tone, such as only the first test tone or only the second test tone, which may also serve the purpose of obtaining a vibration transfer function. For more information, refer to the corresponding descriptions 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 location based on the first test audio signal, the second test audio signal, the first feedback signal, and the second feedback signal. The first feedback signal may represent a signal transmitted from the bone conduction speaker 122 to the first location via the vibration transmission path and the air conduction transmission path, the second feedback signal may represent a signal transmitted from the bone conduction speaker 122 to the second location via the path transmission by air conduction. The first feedback signal may be output from the at least one microphone after receiving the first audio signal at the first location, and the second feedback signal may be output from the at least one microphone after receiving the second audio signal at the second location. The first audio signal and the second audio signal may be generated by the bone conduction speaker 122 based on the first test audio signal and the second test audio signal, respectively. For more information about generating the first sound and the second sound based on the first test tone and the second test tone, refer to the detailed descriptions of step 220, which are not repeated here.

In some embodiments, upon receiving the first test audio signal, the processing module 320 may determine a first feedback signal path transfer function based on the first audio transmitted by the speaker 122 to the first location based on the first test audio signal and the first feedback signal. For more information about determining the first transfer function of the feedback signal path, refer to the detailed description of step 240 in FIG. 2, which are not repeated here.

In some embodiments, processing module 320 may also determine a second transfer function of the feedback signal path of the second sound transmitted from the bone conduction speaker 122 to the second location based on the second test audio signal and the second feedback signal. For more information about determining the transfer function along the second feedback signal path, refer to the detailed description of step 240 in FIG. 2, which are not repeated here.

In some embodiments, processing module 320 may determine a vibration transfer function from the bone conduction speaker 122 to the first location based on the first feedback signal path transfer function and the second feedback signal path transfer function. For more information about determining the vibration transfer function from the bone conduction speaker 122 to the first location, refer to the detailed description of step 240 in FIG. 2, which are not repeated here.

In some embodiments, processing module 320 may determine a vibration feedback signal from the bone conduction speaker 122 to the first location 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 location based on the first test audio signal, the second test audio signal, and the vibration feedback signal. For more information about determining the vibration transfer function from the bone conduction speaker 122 to the first location, refer to the detailed description of step 240 in FIG. 2, which are not repeated here.

It should be noted that the above descriptions are provided for illustrative purposes only and are not intended to limit the scope of the present disclosure. Numerous changes and modifications may be made by those skilled in the art in reliance upon the present disclosure. The features, structures, methods, and other features 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, wherein the first processing module may be configured to determine a first feedback signal path transfer function of the first feedback signal path, and the second processing module may be configured to determining a second transfer function of the feedback signal path. However, these changes and modifications do not depart from the scope of this disclosure.

In other embodiments of the present disclosure, a computer readable medium is provided including at least one processor 140 and at least one database 130. At least one database 130 may be configured to store computer instructions and at least one processor 140 may be configured to execute at least a portion of the computer instructions to implement the process 200 described above.

In other embodiments of the present disclosure, a method for detecting the status of a bone conduction hearing device is also provided. In fig. 9 illustrates an exemplary flowchart for detecting the status of a bone conduction hearing device in accordance with some embodiments of the present disclosure. The bone conduction hearing device may comprise at least a microphone, a speaker, a feedback analysis unit, and a signal processing unit. In some embodiments, the microphone may comprise a bone conduction microphone, an air conduction microphone, etc. The above microphone may be exemplary embodiments of at least one detector disclosed in the present disclosure, for example, the microphone may be the microphone shown in FIG. 4 and fig. 5. The speaker may include a bone conduction speaker configured to convert electrical signals into acoustic signals that may be the same or different from the audio signals of the bone conduction speaker 122. The microphone and the bone conduction speaker can be respectively installed at different locations of the bone conduction hearing device. For example, a microphone and a speaker may be respectively mounted at various locations on the body of a bone conduction hearing device. In some embodiments, the feedback analysis unit and the signal processing unit may be two separate devices or may be components of a single device that implement two different functions. For example, a feedback analysis unit and a signal processing unit may be combined into a state detection device. It should be understood that the condition detection device may be combined with a microphone and speaker to form an integral device, or may be a device independent of the microphone and speaker. To differentiate the above two installation methods, the following descriptions present two application scenarios. For example, when a condition detection device is combined with a microphone and a speaker to form an integrated device, the bone conduction hearing device can realize condition self-detection before or during use to detect whether the bone conduction hearing device is in a normal structural condition, an abnormal structural condition, or in a state of foreign body penetration. As another example, when the condition detection device is installed independently of the microphone and speaker, the bone conduction hearing device may communicate and/or connect with the condition detection device before or during use to detect the condition of the bone conduction hearing device and detect whether bone conduction hearing device in normal structural condition, abnormal structural condition, or foreign body penetration condition.

A method for detecting the state of a bone conduction hearing device may comprise the following steps.

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

In some embodiments, a first signal (ie, an audio test signal) may be generated by a signal processing unit, transmitted to a speaker, and the speaker may convert the first signal into a third audio signal. In some further embodiments, the first signal may be a signal output after the microphone senses the fourth audio signal. The fourth audio signal can be environmental sound, noise, human speech, or any other sound picked up by the microphone. The first signal may be an electrical signal converted from the fourth audio signal. The microphone may sense the fourth audio signal and output the first signal, which may be transmitted to a speaker, and the speaker may convert the first signal into a third audio signal.

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

The audio signal generated by the speaker may be received by the microphone, and the microphone may generate corresponding feedback information. In some embodiments, after the microphone receives the third audio signal, it may generate a feedback signal based on the third audio signal and send the feedback signal to a feedback analysis unit. In some embodiments, the microphone may generate a feedback signal in a similar or similar manner as the first feedback signal as mentioned above.

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

In some embodiments, the method of determining the transfer function of the feedback signal path from the speaker of the bone conduction hearing device to the microphone may be the same as the method of determining the first feedback signal path transfer function F ₁ (z) and/or the second function F ₂ (z ) transmission along the feedback signal path, as shown in FIG. 2. For the purpose of explanation, the transmission function F ₃ (z) along the feedback signal path from the speaker of the bone conduction hearing device to the microphone can be determined by formula (9):

… (9),

where Y ₃ (z) represents the first transformed signal obtained by performing a Z-transform on the first signal input by the bone conduction hearing device, X ₃ (z) represents the transformed feedback signal obtained by performing a Z-transform on the feedback signal, received from the microphone output.

By performing a Z transform on the first signal and the feedback signal, a first transformed signal Y ₃ (z) and a transformed feedback signal X ₃ (z) can be obtained. Therefore, the transfer function of the feedback signal path from the speaker of the bone conduction hearing device to the microphone can be determined by formula (9).

At step 940, at least one specified transfer function of the feedback signal path may be obtained. Step 940 may be performed by feedback analysis unit 1030.

The predetermined feedback path transmission function(s) may be understood as the feedback path transmission function(s) that have been preset or stored in the storage device (eg, in the database 1030). In some embodiments, the predetermined feedback path transfer function(s) may comprise a feedback path transfer function determined according to a method disclosed in other embodiments of the present disclosure (eg, step 240), such as a first transfer function feedback signal paths. In some embodiments, the specified feedback path transfer function(s) may also be a feedback path transfer function manually set by the operator based on his experience. In some embodiments, the specified feedback path transfer function(s) may comprise at least 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 a normal state of a bone conduction hearing device. For example, a standard feedback path transfer function may represent the feedback path characteristic function of a bone conduction hearing device when worn by a large number of people, or it may be a personalized feedback path characteristic function of a specific user when wearing it. usually carried and used. The abnormal transfer function of the feedback signal path may be the transfer function of the feedback signal path corresponding to the abnormal condition of the bone conduction hearing device. In some embodiments, the anomalous feedback signal path may correspond to a variety of possible feedback alarms. In some embodiments, the specified feedback path transfer function(s) may comprise transfer functions of the feedback path from the speaker to the microphone when the bone conduction hearing device is in various states. The different states of the bone conduction hearing device may comprise a state in which the user is wearing the bone conduction hearing device on himself (in which case the speaker or body of the bone conduction hearing device matches the identity of the user) and a state in which the user is not wearing such a device. (in this case, the speaker or body of the bone conduction hearing device does not match the user's identity). Accordingly, the at least one predetermined feedback path transfer function may comprise a transfer function of a feedback path when the user is wearing the bone conduction hearing device (also known as the “first predetermined feedback path transfer function” ), and a feedback path transfer function when the user is not wearing the device (also known as the “second specified feedback path transfer function”).

At step 950, the transfer function of the feedback signal path may be compared with at least one specified transfer function of the feedback signal path. Step 950 may be performed by feedback analysis module 1030.

In some embodiments, the feedback path transfer function determined at step 930 may 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 the feedback path transfer function and the standard feedback function of at least one given feedback path transfer function is within a given threshold range: if so, a decision may be made whether that the transfer function of the feedback signal path is normal; otherwise, it can be decided that the transfer function of the feedback signal path is anomalous. In some embodiments, it may also be determined whether the ratio of the feedback path transfer function to the standard feedback function of at least one given feedback path transfer function is within a given threshold range. If this is the case, then it can be concluded that the transfer function of the feedback signal path is normal. Otherwise, it can be decided that the transfer function of the feedback signal path is anomalous. In some embodiments, it is possible to determine whether the difference between the feedback path transfer function and the anomalous feedback function of at least one given feedback path transfer function is within a given threshold range: if so, then a decision can be made whether that the transfer function of the feedback signal path is anomalous. Otherwise, it can be assumed that the transfer function of the feedback signal path is normal. In some embodiments, it may also be determined whether the ratio of the feedback path transfer function to the anomalous feedback function of at least one given feedback path transfer function is within a predetermined threshold range. If this is the case, then it can be concluded that the transfer function of the feedback signal path is anomalous. Otherwise, it can be assumed that the transfer function of the feedback signal path is normal. In some embodiments, the above predetermined threshold range can be set manually and can be adjusted according to various situations, which is not limited in the present disclosure.

In some embodiments, if at least one specified feedback signal path transfer function contains at least two specified feedback signal path transfer functions, the specified feedback signal path transfer function has the smallest difference from the signal path transfer function feedback can be defined as the final specified transfer function of the feedback signal path. For example, the at least one predetermined feedback signal path transfer function may comprise a first predetermined feedback signal path transfer function and a second predetermined feedback signal path transfer function. If the difference between the first target feedback signal path transfer function and the feedback signal path transfer function is greater than the difference between the second target feedback signal path transfer function and the feedback signal path transfer function, the second target signal path transfer function feedback can be defined as the final specified transfer function of the feedback signal path.

At step 960, the signal processing unit may determine the state of the bone conduction hearing device in accordance with 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 transfer function of the feedback signal path is normal or abnormal. In some embodiments, if the transfer function of the feedback signal path is normal, it may be determined that the condition of the bone conduction hearing device is normal; if the transfer function of the feedback signal path is abnormal, it may be decided that the condition of the bone conduction hearing equipment is abnormal. In some embodiments, the bone conduction hearing device state may comprise a normal structural state, an abnormal structural state, and a foreign body intrusion state. The wearing state means that the bone conduction hearing device is worn on the wearer's body. The non-wearable condition means that the bone conduction hearing device is not worn on the wearer's body. Normal structural condition 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 in a normal manner. An abnormal structural condition may be the opposite of a normal structural condition, which means that the structure and/or components of the bone conduction hearing device may be in an abnormal operating condition (eg, a component of the bone conduction hearing device has become dislodged, moved, or damaged due to collision) . A foreign body penetration condition may refer to objects other than the structure and/or components of the bone conduction hearing device being introduced into the bone conduction hearing device. In some embodiments, a normal structural condition may be classified as a normal condition, and an abnormal structural condition and a foreign body penetration condition may be classified as an abnormal condition. In some embodiments, the comparison result may reflect a wearing state of the bone conduction hearing device, such as a worn state or a non-worn state.

In some embodiments, the transfer function of the bone conduction hearing device feedback signal paths in a normal state (eg, a normal structural condition) and an abnormal condition (eg, a foreign body penetration condition) can be determined in the manner shown in FIG. 2, and stored in the database 130 as predetermined transfer functions of the feedback signal path. In some embodiments, a feedback path transfer function corresponding to a bone conduction hearing device in an abnormal condition (e.g., a foreign body intrusion condition) may be used as the abnormal feedback path transfer function in at least one given transfer function of the feedback signal path, and the transfer function of the feedback signal path corresponding to the bone conduction hearing device in a normal state (eg, in a normal state of the structure) can be used as a standard transfer function of the feedback signal path. In some embodiments, a plurality of predetermined feedback path transfer functions may be stored in the database 130, and each predetermined feedback path transfer function may correspond to a state (normal state, abnormal state) of the bone conduction hearing device. At steps 950 and 960, by comparing the current feedback signal path transfer function of the bone conduction hearing device with at least one target feedback signal path transfer function in the database 130, the target feedback signal path transfer function in database 130 that is closest to the current transfer function of the bone conduction hearing device feedback signal path. Then, the state of the bone conduction hearing device corresponding to the selected predetermined transfer function of the feedback signal path may be the current state of the bone conduction hearing device. Therefore, according to the process described above, the current state of the bone conduction hearing device can be determined in real time.

In some embodiments, the result of the comparison may be used to identify different types of at least one given feedback signal path transfer function, thereby identifying different states of the bone conduction hearing device. In some embodiments, the types of the at least one predetermined feedback path transfer function may comprise at least one feedback path transfer function corresponding to a tight fit state, a loose fit state, and a wear state on a particular head portion. According to the types of one or more predetermined feedback path transfer functions whose differences or ratio for the feedback path transfer function of which are within a predetermined threshold range, the feedback path transfer function type can be determined and then can the condition of the bone conduction hearing device can be determined. For example, if the type of a given feedback signal path transfer function is determined to correspond to a tight fit condition (i.e., the bone conduction hearing device is tightly fitted to the wearer), the type of feedback signal path transfer function may also correspond to a tight fit condition such that may indicate that the bone conduction hearing device is tightly fitted to the wearer. As another example, if the type of a given feedback signal path transfer function is determined to be a free-fitting state, the feedback signal path transfer function type may also be a free-fitting type. Accordingly, this may mean that the bone conduction hearing device does not have close contact with the wearer. As another example, different predetermined transfer functions of the feedback signal path may correspond to other parts of the head on which the bone conduction hearing device is worn. If the type of a given feedback path transfer function corresponds to a particular part of the head (eg, mastoid, temporal bone, or forehead), the type of feedback path transfer function may also correspond to a part of the head. Accordingly, this may represent the position of a bone conduction hearing device worn by the user on the head (eg, mastoid, temporal bone, or forehead).

In some embodiments, after determining the condition of the bone conduction hearing device, the signal processing module 1040 may also send a reminder message to the user indicating the aforementioned determined condition. In some embodiments, if the condition of the bone conduction hearing device is abnormal, the user may be reminded to correct the condition of the bone conduction hearing device. In some embodiments, the methods of reminding the user may include, but are not limited to, a voice prompt, a warning light prompt, a vibration prompt, a text prompt, a remote message, etc. Specifically, the speech prompt may be a voice message sent by a bone conduction hearing device, such as “a foreign body has entered the earpiece.” A bone conduction hearing device may be equipped with a warning light. When the bone conduction hearing device is in a normal state, the warning light may light green, and when the bone conduction hearing device is in an abnormal state, the warning light may light red to remind the owner. When the condition of the bone conduction hearing device is abnormal, the bone conduction hearing device will vibrate, for example, vibration 3 times may indicate that the bone conduction hearing device has an abnormal structure disorder; Continuous vibration may indicate foreign body penetration. The text prompt may refer to a text message displayed on the bone conduction hearing device or to a terminal communicating and/or connected to the bone conduction hearing device to remind the user, such as “a foreign body has entered the earphone” and “the earphone has an abnormal structure.” "

It should be noted that the above description is provided for illustrative purposes only and is not intended to limit the scope of the present disclosure. Numerous changes and modifications may be made by those skilled in the art based on the contents of the present disclosure. The features, structures, methods, and other features of the exemplary embodiments described herein may be combined in various ways to provide additional and/or alternative exemplary embodiments. For example, there may be many states of a bone conduction hearing device, but which states belong to the normal state and which states belong to the abnormal state can be determined by the operator according to his experience, the user, or the signal processing module 1040. However, these changes and modifications should not depart from the scope of protection of this disclosure.

In fig. 10 is a diagram of an exemplary bone conduction hearing device status detection system module in accordance with some embodiments of the present disclosure. The bone conduction hearing device condition detection system 1000 may be briefly referred to as system 1000. As shown in FIG. 10, in some embodiments, system 1000 may include an audio signal generation module 1010, a feedback signal generation module 1020, a feedback analysis module 1030, and a signal processing module 1040.

The audio signal generation module 1010 may be configured to generate a third audio signal based on the first signal. The first signal may be generated by a signal processing unit. In some embodiments, audio generation module 1010 may be a bone conduction speaker or part of a bone conduction speaker. For more information about generating the third audio signal based on the first signal, refer to the detailed descriptions in FIGS. 9, which are not repeated here.

The feedback signal generating unit 1020 may be configured to receive the third audio signal and generate a feedback signal. In some embodiments, feedback signal generation module 1020 may be a microphone or part of a microphone. For more information about feedback signal generation, refer to the detailed description of FIG. 9, which is not repeated here.

The feedback analysis module 1030 may be configured to determine a transfer function of the feedback signal path from the speaker of the bone conduction hearing device to the microphone based on the feedback signal and the first signal. The feedback analysis module 1030 may also be configured to obtain at least one specified transfer function of the feedback signal path. In addition, the feedback analysis module 1030 may also be configured to compare the transfer function of the feedback signal path with at least one predetermined transfer function of the feedback signal path. For more information about determining the feedback signal path transfer function, comparing the feedback signal path transfer function and at least one specified feedback signal path transfer function, refer to the detailed descriptions of FIGS. 9, which are not repeated here.

The signal processing module 1040 may be configured to determine the state of the bone conduction hearing device in accordance with the comparison result. For more information about determining the status of a bone conduction hearing device, refer to the detailed description of FIG. 9, which is not repeated here.

In some embodiments of the present disclosure, a computer-readable medium may also be provided. The medium stores computer instructions. When a computer reads computer instructions contained on the medium, the computer may perform: generating a third audio signal based on the first signal, where the first signal may be a test signal generated by the computer; receiving the third sound signal and generating a feedback signal; determining a transfer function of the feedback signal 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 specified transfer function of the feedback signal path; comparing a transfer function of the feedback signal path with at least one predetermined transfer function of the feedback signal path; determining the condition 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 intended for convenience of description only and is not intended to limit the scope of the presented embodiments. It should be understood that those skilled in the art, after understanding the principle of the system, can make any combination of various devices/modules or form a subsystem for connection with other devices/modules without deviating from this principle. For example, the feedback analysis module 1030 and the signal processing module 1040 disclosed in FIG. 10 may be different modules within 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 memory module. As another example, each module may share a memory module. Such modifications are within the scope of protection of this disclosure.

Possible preferred results of embodiments of the present disclosure include, but are not limited to, the following: (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 process simpler and more convenient; (2) the current state of the bone conduction hearing device can be detected according to the transfer function of the feedback signal path, and corresponding reminders about the state of the bone conduction hearing device can be sent to the user, so that the user can know or adjust the state of the bone conduction hearing device, to improve the user's experience of using it. It should be noted that different embodiments may produce different preferred results. In various embodiments, the possible preferred results may be any one or combination of the results presented above or any other possible preferred results.

Having thus described the basic concepts, it should be readily apparent to those skilled in the art upon reading the present disclosure that the foregoing detailed disclosure is intended to be presented by way of example only and not limitation. Various changes, improvements and modifications may be made and are intended for those skilled in the art, although not expressly stated herein. These changes, improvements, and modifications are intended to be suggested by this disclosure and are consistent with the spirit and scope of the exemplary embodiments of this disclosure.

However, certain terminology has been used to describe embodiments of the present disclosure. For example, the terms “one embodiment,” “an embodiment,” and/or “certain embodiments” mean that a particular feature, structure, or characteristic described in connection with an embodiment is contained in at least one embodiment of the present disclosure. It is therefore emphasized and understood that two or more references to “embodiment” or “one embodiment” or “alternative embodiment” in different parts of this specification do not necessarily all refer to the same embodiment. Additionally, specific features, structures, or characteristics may be combined as needed in one or more embodiments of the present disclosure.

In addition, unless expressly stated in the claims, the order of processing of elements and sequences, the use of numbers and letters, or the use of other names described in the application are not used to limit the order of the processes and methods of the present disclosure. Although certain embodiments of the present disclosure that are now considered useful have been discussed in the foregoing disclosure through various examples, it is to be understood that such details are for purposes of explanation only and the additional claims are not limited to the disclosed embodiments. On the other hand, the claims are intended to cover all amendments and equivalent combinations that fall within the spirit and scope of the embodiments of the present disclosure. For example, although the system components described above may be implemented in hardware, they may also be implemented only by 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 description disclosed in the present disclosure and thereby assist in understanding one or more embodiments of the invention, the above description of embodiments of the present disclosure sometimes contains in one embodiment a plurality of features, accompanying drawings, or a description thereof. . However, this method of disclosure does not mean that the subject matter of the present disclosure requires more features than those mentioned in the claims. In fact, the features of a particular embodiment constitute a minority of all the features of the single embodiment disclosed herein.

Finally, it should be understood that the embodiments described in the present disclosure merely illustrate the principles of the embodiments of the present disclosure. Other modifications may fall within the scope of this disclosure. Accordingly, by way of example, and not by way of limitation, alternative configurations of embodiments of the present disclosure may be considered consistent with the principles of the present disclosure. Accordingly, the embodiments of the present disclosure are not limited to the embodiments expressly presented and described in the present disclosure.

Claims (26)

1. A method for obtaining a vibration transfer function from a sound signal generation unit to sound reception sites, the method comprising the steps of: generating a first test audio signal and a second test audio signal by means of a test signal generating unit; generating, by means of an audio signal generating unit, a first audio signal and a second audio signal based on the first test audio signal and the second test audio signal, respectively; outputting, by at least one detector, a first feedback signal after receiving the first audio signal at the first location, the first feedback signal comprising a signal transmitted from the audio signal generating unit to the first location via a vibration transmission path and via an air conduction transmission path; outputting, by said at least one detector, a second feedback signal after receiving the second audio signal at a second location, wherein the second feedback signal comprises a signal transmitted from the audio signal generation unit to the second location via an air conduction transmission path; the vibration transfer function from the audio signal generating unit to the first location is determined by the feedback signal path determining unit based on the first test audio signal, the second test audio signal, the first feedback signal and the second feedback signal. 2. The method of claim 1, wherein said at least one detector comprises an air conduction microphone. 3. The method according to claim 1, in which the audio signal generation unit is fixed to the device, said at least one detector is rigidly or elastically connected to the device at a first location, and the audio signal generation unit is located in the device. 4. The method of claim 3, wherein said at least one detector is located remotely from the device at a second location, the second location being adjacent to the first location. 5. Method according to any one of paragraphs. 1-4, wherein the at least one detector includes a first microphone and a second microphone, the first microphone located at a first location and the second microphone located at a second location. 6. Method according to any one of paragraphs. 1-4, in which at the stage of determining the vibration transfer function from the audio signal generating unit to the first place based on the first test audio signal, the second test audio signal, the first feedback signal and the second feedback signal: determining a first transfer function of the feedback signal path from the audio signal generation unit to the first location based on the first test audio signal and the first feedback signal; determining a second transfer function of the feedback signal path from the audio signal generation unit to the second location based on the second test audio signal and the second feedback signal; And determining a vibration transfer function from the audio signal generating unit to the first location based on the first transfer function of the feedback signal path and the second transfer function of the feedback signal path. 7. The method of claim 6, wherein in the step of determining the first transfer function of the feedback signal path based on the first test audio signal and the first feedback signal: obtaining a first converted test audio signal and a first converted feedback signal by converting the first test audio signal and the first feedback signal, respectively; And determining the first transfer function of the path of the feedback signal from the audio signal generation unit to the first place based on the first converted test audio signal and the first converted feedback signal. 8. The method of claim 6, wherein in the step of determining a second feedback signal path transfer function based on the second test audio signal and the second feedback signal: obtaining a second converted test audio signal and a second converted feedback signal by converting the second test audio signal and the second feedback signal, respectively; And determining a second transfer function of the feedback signal path from the audio signal generating unit to the second location based on the second converted test audio signal and the second converted feedback signal. 9. Method according to any one of paragraphs. 1-4, in which at the stage of determining the vibration transfer function from the audio signal generating unit to the first place based on the first test audio signal, the second test audio signal, the first feedback signal and the second feedback signal: determining a vibration feedback signal from the audio signal generation unit to the first location based on the first feedback signal and the second feedback signal; And determining the vibration transfer function from the audio signal generation unit to the first location based on the first test audio signal, the second test audio signal and the vibration feedback signal. 10. The method according to claim 9, in which at the stage of determining the vibration transfer function from the audio signal generating unit to the first place based on the first test audio signal, the second test audio signal and the vibration feedback signal: obtaining a first converted test audio signal, a second converted test audio signal, and a converted vibration feedback signal by converting the first test audio signal, the second test audio signal, and the vibration feedback signal, respectively; And determining the vibration transfer function from the audio signal generating unit to the first location based on the first converted test audio signal, the second converted test audio signal and the converted vibration feedback signal.