Hearing aid anti-lost system and hearing aid anti-lost method

Abstract

The invention relates to a hearing aid, in particular to a hearing aid anti-lost system and a hearing aid anti-lost method, the hearing aid anti-lost system comprises a hearing aid and a smart phone, and the hearing aid comprises an in-ear detection module and a Bluetooth communication module; the hearing aid judges whether the hearing aid is in a wearing state or not through the in-ear detection module on the basis of acoustic propagation path differences formed in the wearing state and the non-wearing state of the hearing aid, and periodically sends wearing state information to the smart phone through the Bluetooth communication module; the smart phone is used for displaying the wearing state information sent by the hearing aid, reminding a user and automatically recording and storing the current time and the current position when the hearing aid is in a non-wearing state, continuously monitoring the Bluetooth signal strength, automatically recording and storing the loss time and the loss position when the Bluetooth signal is disconnected for the user to check, and simultaneously sending an alarm to the user; according to the technical scheme provided by the invention, the defect that accurate and efficient anti-lost protection is difficult to provide in the prior art can be effectively overcome.

Description

Technical Field

[0001] The present invention relates to a hearing aid, and more particularly to a hearing aid anti-loss system and an anti-loss method. Background Art

[0002] With the advent of an aging society, hearing aids will become an indispensable auxiliary tool for more and more hearing-impaired people in their daily lives. Currently, there are a wide variety of hearing aids on the market, including behind-the-ear, in-the-canal, etc. Although these devices play a significant role in improving hearing, due to the small size of hearing aids and the ease of loss, they also bring a lot of troubles to users. Traditional hearing aid anti-loss technologies mainly rely on physical latches or wearing brackets and other designs. Although these solutions have certain effects, in the actual use process, users often ignore the role of these additional devices, resulting in the still existing risk of hearing aid loss.

[0003] In order to effectively reduce the probability of hearing aid loss, some existing technologies attempt to add positioning sensors (such as GPS, RFID, Bluetooth positioning modules, etc.) inside the hearing aid to achieve the anti-loss function. However, such technical solutions usually face the following problems:

[0004] 1) High cost: Adding a positioning sensor will significantly increase the cost of the hearing aid, and the hearing aid itself is highly sensitive to cost. Especially in the mid- to low-end market, the high cost not only increases the purchase burden on consumers, but also raises the manufacturing cost of manufacturers, restricting the popularization of hearing aids;

[0005] 2) Technical complexity: Integrating a positioning sensor will increase the design complexity of the hearing aid, which may lead to an increase in its volume and a decrease in wearing comfort. In addition, positioning technologies usually require additional hardware support, which will increase the weight and energy consumption of the hearing aid, affecting the user experience;

[0006] 3) Lack of in-ear detection function: Existing hearing aid anti-loss technologies lack an effective in-ear state detection function. When the hearing aid falls from the ear, the system cannot timely sense this change, which may lead to delayed or missed alarms, thus increasing the risk of hearing aid loss;

[0007] 4) Lack of disconnection alarm function with the mobile phone: Existing hearing aid anti-loss technologies usually cannot alarm in time when the hearing aid is disconnected from the mobile phone. Although some devices can give reminders when the Bluetooth signal is lost, these systems often fail to accurately judge whether it is a problem with the wearing state of the hearing aid or the disconnection of the Bluetooth signal due to too far a distance. If the hearing aid falls and is far from the mobile phone, the existing technical solutions cannot effectively remind the user, resulting in untimely alarms and missing the best opportunity to find the hearing aid.

[0008] In summary, there are many problems in the existing technical solutions in terms of cost, complexity, and functional perfection, and they cannot meet the requirements of high cost performance, simple design, and real-time performance at the same time. Therefore, there is an urgent need to design a new hearing aid anti-loss solution that can reduce costs, simplify the design, and provide more accurate and efficient anti-loss protection through the collaborative work of the smartphone and the hearing aid. Summary of the Invention

[0009] (I) Technical problems to be solved

[0010] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a hearing aid anti-loss system and an anti-loss method, which can effectively overcome the defect that it is difficult to provide accurate and efficient anti-loss protection in the existing technology.

[0011] (II) Technical solutions

[0012] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0013] A hearing aid anti-loss system includes a hearing aid and a smartphone. The hearing aid includes an in-ear detection module and a Bluetooth communication module;

[0014] The hearing aid determines whether it is in a worn state based on the difference in the acoustic propagation path formed when it is in the worn state and the non-worn state through the in-ear detection module, and periodically sends the wearing state information to the smartphone through the Bluetooth communication module;

[0015] The smartphone displays the wearing state information sent by the hearing aid, reminds the user when the hearing aid is in the non-worn state, automatically records and stores the current time and the current location, continuously monitors the Bluetooth signal strength at the same time, and automatically records and stores the loss time and the loss location when the Bluetooth signal is disconnected for the user to view, and at the same time issues an alarm to the user.

[0016] Preferably, the in-ear detection module determines whether it is in a worn state based on the difference in the acoustic propagation path formed when the hearing aid is in the worn state and the non-worn state, including:

[0017] S1. Collect the historical wearing data of the hearing aid, accurately estimate the acoustic propagation path of the hearing aid when it is in the worn state according to the historical wearing data, and obtain the reference acoustic propagation path h of the hearing aid 1 ;

[0018] S2. Use the LMS algorithm to continuously estimate the acoustic propagation path h(t) of the hearing aid by minimizing the error, so that the acoustic propagation path h(t) of the hearing aid gradually approaches the actual acoustic propagation path;

[0019] S3. Compare the acoustic propagation path h(t) of the hearing aid with the reference acoustic propagation path h 1Compare and determine whether the hearing aid is in a worn state based on the comparison result;

[0020] Among them, the reference acoustic propagation path h of the hearing aid 1 It can also be estimated using the LMS algorithm. The longer the estimation time, the more accurate the estimation result. A relatively accurate estimation result is obtained by taking the average multiple times.

[0021] Preferably, in S2, the LMS algorithm is used to continuously estimate the acoustic propagation path h(t) of the hearing aid by minimizing the error, so that the acoustic propagation path h(t) of the hearing aid gradually approaches the actual acoustic propagation path, including:

[0022] Estimate the acoustic propagation path h(t) of the hearing aid using the following formula:

[0023]

[0024] Among them, y(t) is the signal received by the microphone of the hearing aid, x(t) is the signal emitted by the speaker of the hearing aid, t is the time, T is the estimation time, and * represents convolution.

[0025] Preferably, in S2, the LMS algorithm is used to continuously estimate the acoustic propagation path h(t) of the hearing aid by minimizing the error, so that the acoustic propagation path h(t) of the hearing aid gradually approaches the actual acoustic propagation path, including:

[0026] S21. Initialize parameters;

[0027] S22. For each moment t, calculate the error between the output signal obtained after the signal emitted by the speaker of the hearing aid passes through the acoustic propagation path h(t) of the hearing aid and the signal received by the microphone of the hearing aid;

[0028] S23. Update the acoustic propagation path h(t) of the hearing aid according to the error at each moment t;

[0029] S24. Return to S22 and iterate continuously until the acoustic propagation path h(t) of the hearing aid that approximates the actual acoustic propagation path is finally obtained.

[0030] Preferably, the initialization of parameters in S21 includes:

[0031] Initialize the acoustic propagation path h(t) of the hearing aid to 0 or an initial value, denoted as h(0), or collect data for a period of time after the hearing aid is started for preliminary estimation;

[0032] Set the step size μ for controlling the update speed. The larger the step size μ, the faster the update speed of the acoustic propagation path h(t) of the hearing aid, but the less stable it is; the smaller the step size μ, the slower the update speed of the acoustic propagation path h(t) of the hearing aid, but the slower the convergence speed.

[0033] Preferably, for each moment t in S22, calculate the error between the output signal obtained after the signal emitted by the loudspeaker of the hearing aid passes through the acoustic propagation path h(t) of the hearing aid and the signal received by the microphone of the hearing aid:

[0034] Calculate the error e(t) using the following formula:

[0035]

[0036] where y(t) is the signal received by the microphone of the hearing aid, is the output signal obtained after the signal x(t) emitted by the loudspeaker of the hearing aid passes through the acoustic propagation path h(t) of the hearing aid, t is the moment, and * represents convolution.

[0037] Preferably, in S23, update the acoustic propagation path h(t) of the hearing aid according to the error at each moment t, including:

[0038] Update the acoustic propagation path h(t) of the hearing aid using the following formula:

[0039] h(t + 1) = h(t) + μ · x(t) · e(t);

[0040] where x(t) is the signal emitted by the loudspeaker of the hearing aid, t is the moment, and μ is the step size used to control the update speed.

[0041] Preferably, in S3, compare the acoustic propagation path h(t) of the hearing aid with the reference acoustic propagation path h 1 and determine whether the hearing aid is in the wearing state according to the comparison result, including:

[0042] When the acoustic propagation path h(t) of the hearing aid and the reference acoustic propagation path h 1 satisfy the following formula, determine that the hearing aid is in the wearing state:

[0043] h(t) - h 1 | ≤ δ;

[0044] where δ is a preset threshold.

[0045] A hearing aid anti - loss method, including the following steps:

[0046] S1. The hearing aid determines whether it is in the wearing state through the in - ear detection module based on the difference in the acoustic propagation path formed when the hearing aid is in the wearing state and the non - wearing state;

[0047] S2. The hearing aid periodically sends the wearing state information to the smart phone through the Bluetooth communication module;

[0048] S3. The smart phone displays the wearing status information sent by the hearing aid, reminds the user when the hearing aid is in a non-wearing state, automatically records and stores the current time and current location, and continuously monitors the Bluetooth signal strength;

[0049] S4. When the Bluetooth signal is disconnected, the smart phone automatically records and stores the loss time and loss location for the user to view, and at the same time issues an alarm to the user.

[0050] (III) Beneficial effects

[0051] Compared with the prior art, a hearing aid anti-loss system and method provided by the present invention have the following beneficial effects:

[0052] 1) A simple anti-loss solution

[0053] Compared with the prior art solutions that commonly achieve the anti-loss function by adding positioning sensors, the present invention utilizes the Bluetooth function and the ear-in detection technology to achieve a simple and low-cost anti-loss function, without the need to additionally add high-cost positioning sensors or hardware devices, significantly reducing the manufacturing and use costs;

[0054] 2) Convenient to use

[0055] The present invention makes full use of the popularity and powerful computing power of smart phones, avoids adding complex hardware functions inside the hearing aid, and through the collaborative work of Bluetooth and smart phones, users do not need to purchase additional anti-loss devices and can use the existing smart phones for real-time monitoring and alarming, greatly improving the use convenience;

[0056] 3) Real-time wearing status monitoring

[0057] The ear-in detection function can monitor in real time whether the hearing aid is worn in the ear canal. Once it detects that the hearing aid has fallen off or is not worn, the system will remind the user to avoid the difficulty of searching caused by the long-term detachment of the hearing aid. Compared with the traditional passive anti-loss solutions, the present invention provides a more timely and intelligent response;

[0058] 4) Accurate loss positioning

[0059] By combining Bluetooth and GPS of the smart phone, the present invention can timely record and store the accurate loss time and loss location to help the user quickly find the hearing aid. After the hearing aid exceeds the Bluetooth connection range, the mobile phone will automatically record the location. Even at a relatively long distance, the user can view the loss location through the mobile phone APP, reducing the difficulty of searching for the hearing aid;

[0060] 5) Intelligent alarm and multiple reminder methods

[0061] When the hearing aid falls off and is out of the Bluetooth connection range, the mobile phone will send an alarm to the user and notify the user in time through the APP. In addition, the user can select other alarm methods according to their needs, such as vibration or audio prompts, to ensure that the alarm can attract the user's attention in time and enhance security;

[0062] 6) Strong compatibility and easy to integrate

[0063] The hearing aid anti-loss system of the present invention can be compatible with a variety of smartphone platforms, connected through Bluetooth and the APP. Users can easily activate the anti-loss function without complex operations. In addition, the hardware design of the hearing aid is simple, facilitating integration with existing hearing aid products;

[0064] 7) User-friendly experience

[0065] Through the seamless connection between the APP and the smartphone, the present invention provides a user-friendly operation interface for users. Users can easily view the wearing status, historical records, and the time and location of loss of the hearing aid, improving the overall usage experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0067] Figure 1 It is a system schematic diagram of the present invention;

[0068] Figure 2 It is a process schematic diagram of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0069] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0070] A hearing aid anti-loss system, as Figure 1 shown, includes a hearing aid and a smartphone. The hearing aid includes an in-ear detection module and a Bluetooth communication module (using low-power Bluetooth technology, which can extend the battery usage time of the hearing aid);

[0071] Hearing aid, which judges whether it is in the wearing state through the in-ear detection module based on the difference in the acoustic propagation path formed in the wearing state and the non-wearing state, and periodically sends the wearing state information to the smart phone through the Bluetooth communication module;

[0072] Smart phone, which displays the wearing state information sent by the hearing aid, reminds the user when the hearing aid is in the non-wearing state and automatically records and stores the current time and current location, and continuously monitors the Bluetooth signal strength at the same time. When the Bluetooth signal is disconnected, it automatically records and stores the loss time and loss location for the user to view, and at the same time sends an alarm to the user (it can be notified through the APP, and the user can also choose to receive the alarm information through vibration, audio prompt, etc.).

[0073] In the technical solution of this application, a corresponding APP is installed in the smart phone, which can provide a platform for the user to connect with the hearing aid in real time, display the wearing state information sent by the hearing aid through the APP, and at the same time, the APP will also display the loss time and loss location.

[0074] The in-ear detection module judges whether it is in the wearing state based on the difference in the acoustic propagation path formed in the wearing state and the non-wearing state of the hearing aid (in the wearing state, the signal received by the microphone of the hearing aid comes from the signal played by the speaker in the ear canal. Due to various factors such as the shielding effect of the human head in the ear canal, the acoustic propagation path will be very different from the acoustic propagation path when it falls on the ground), including:

[0075] S1. Collect the historical wearing data of the hearing aid, accurately estimate the acoustic propagation path of the hearing aid in the wearing state according to the historical wearing data, and obtain the reference acoustic propagation path h of the hearing aid 1 ;

[0076] S2. Use the LMS algorithm to continuously estimate the acoustic propagation path h(t) of the hearing aid by minimizing the error, so that the acoustic propagation path h(t) of the hearing aid gradually approaches the actual acoustic propagation path (the speed and accuracy of the convergence process are determined by the step size μ and the signal quality);

[0077] S3. Compare the acoustic propagation path h(t) of the hearing aid with the reference acoustic propagation path h 1 and judge whether the hearing aid is in the wearing state according to the comparison result;

[0078] Among them, the reference acoustic propagation path h of the hearing aid 1 can also be estimated by using the LMS algorithm. The longer the estimation time, the more accurate the estimation result. A relatively accurate estimation result is obtained by taking the average multiple times.

[0079] Specifically, in S2, the LMS algorithm is used to continuously estimate the acoustic propagation path h(t) of the hearing aid by minimizing the error, so that the acoustic propagation path h(t) of the hearing aid gradually approaches the actual acoustic propagation path, including:

[0080] The acoustic propagation path h(t) of the hearing aid is estimated using the following formula:

[0081]

[0082] where y(t) is the signal received by the microphone of the hearing aid, x(t) is the signal emitted by the speaker of the hearing aid, t is the time, T is the estimation time, and * represents convolution.

[0083] Specifically, in S2, the LMS algorithm is used to continuously estimate the acoustic propagation path h(t) of the hearing aid by minimizing the error, so that the acoustic propagation path h(t) of the hearing aid gradually approaches the actual acoustic propagation path, including:

[0084] S21. Initialize parameters;

[0085] S22. For each time t, calculate the error between the output signal obtained by the signal emitted by the speaker of the hearing aid passing through the acoustic propagation path h(t) of the hearing aid and the signal received by the microphone of the hearing aid;

[0086] S23. Update the acoustic propagation path h(t) of the hearing aid according to the error at each time t;

[0087] S24. Return to S22, iterate continuously, and finally obtain the acoustic propagation path h(t) of the hearing aid that approximates the actual acoustic propagation path.

[0088] 1) In S21, initialize parameters, including:

[0089] Initialize the acoustic propagation path h(t) of the hearing aid to 0 or an initial value, denoted as h(0), or collect data for a period of time after the hearing aid is started for preliminary estimation;

[0090] Set the step size μ that controls the update speed. The larger the step size μ, the faster the update speed of the acoustic propagation path h(t) of the hearing aid, but the less stable it is; the smaller the step size μ, the slower the update speed of the acoustic propagation path h(t) of the hearing aid, but the slower the convergence speed.

[0091] 2) In S22, for each time t, calculate the error between the output signal obtained by the signal emitted by the speaker of the hearing aid passing through the acoustic propagation path h(t) of the hearing aid and the signal received by the microphone of the hearing aid:

[0092] Calculate the error e(t) using the following formula:

[0093]

[0094] Among them, y(t) is the signal received by the microphone of the hearing aid, is the output signal obtained after the signal x(t) emitted by the speaker of the hearing aid passes through the acoustic propagation path h(t) of the hearing aid, t is the time, and * represents convolution.

[0095] 3) In S23, the acoustic propagation path h(t) of the hearing aid is updated according to the error at each time t, including:

[0096] The acoustic propagation path h(t) of the hearing aid is updated by the following formula:

[0097] h(t + 1) = h(t) + μ · x(t) · e(t);

[0098] Among them, x(t) is the signal emitted by the speaker of the hearing aid, t is the time, and μ is the step size, which is used to control the update speed.

[0099] Specifically, in S3, the acoustic propagation path h(t) of the hearing aid is compared with the reference acoustic propagation path h 1 to determine whether the hearing aid is in the worn state according to the comparison result, including:

[0100] When the acoustic propagation path h(t) of the hearing aid and the reference acoustic propagation path h 1 meet the following formula, it is determined that the hearing aid is in the worn state:

[0101] h(t) - h 1 | ≤ δ;

[0102] Among them, δ is a preset threshold (adjusted to the optimal value according to experimental data).

[0103] In the technical solution of the present application, on the basis of the above - disclosed hearing aid anti - loss system, a hearing aid anti - loss method is also disclosed, as Figure 2 shown, including the following steps:

[0104] S1. The hearing aid determines whether it is in the worn state based on the difference in the acoustic propagation path formed when the hearing aid is in the worn state and the non - worn state through the in - ear detection module;

[0105] S2. The hearing aid periodically sends the worn state information to the smart phone through the Bluetooth communication module;

[0106] S3. The smart phone displays the worn state information sent by the hearing aid, reminds the user when the hearing aid is in the non - worn state, automatically records and stores the current time and current location, and continuously monitors the Bluetooth signal strength;

[0107] S4. When the Bluetooth signal is disconnected, the smart phone automatically records and stores the loss time and loss location for the user to view, and at the same time issues an alarm to the user.

[0108] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A hearing aid anti-lost system, characterized in that: It includes a hearing aid and a smart phone, wherein the hearing aid includes an in-ear detection module and a Bluetooth communication module; The hearing aid determines whether it is in the wearing state based on the difference in acoustic propagation paths formed when the hearing aid is in the wearing state and not in the wearing state through the in-ear detection module, and periodically sends the wearing state information to the smartphone through the Bluetooth communication module; The smart phone displays the wearing status information sent by the hearing aid, reminds the user when the hearing aid is not worn, and automatically records and stores the current time and current location. At the same time, it continuously monitors the Bluetooth signal strength. When the Bluetooth signal is disconnected, it automatically records and stores the loss time and loss location for the user to view, and sends an alarm to the user.

2. The hearing aid anti-lost system according to claim 1, characterized in that: The in-ear detection module determines whether the hearing aid is in the wearing state based on the difference in acoustic propagation paths formed when the hearing aid is in the wearing state and the non-wearing state, including: S1. Collect historical wearing data of the hearing aid, accurately estimate the acoustic propagation path of the hearing aid when it is worn based on the historical wearing data, and obtain the reference acoustic propagation path h1 of the hearing aid; S2. Using the LMS algorithm to continuously estimate the acoustic propagation path h(t) of the hearing aid by minimizing the error, so that the acoustic propagation path h(t) of the hearing aid gradually approaches the actual acoustic propagation path; S3, comparing the acoustic propagation path h(t) of the hearing aid with the reference acoustic propagation path h1, and judging whether the hearing aid is in a wearing state according to the comparison result; The reference acoustic propagation path h1 of the hearing aid can also be estimated using the LMS algorithm. The longer the estimation time is, the more accurate the estimation result is. A relatively accurate estimation result can be obtained by averaging multiple times.

3. The hearing aid anti-lost system according to claim 2, characterized in that: S2 uses the LMS algorithm to continuously estimate the acoustic propagation path h(t) of the hearing aid by minimizing the error, so that the acoustic propagation path h(t) of the hearing aid gradually approaches the actual acoustic propagation path, including: The acoustic propagation path h(t) of the hearing aid is estimated using the following formula: Among them, y(t) is the signal received by the microphone of the hearing aid, x(t) is the signal emitted by the speaker of the hearing aid, t is the time, T is the estimated time, and * represents convolution.

4. The hearing aid anti-lost system according to claim 2, characterized in that: S2 uses the LMS algorithm to continuously estimate the acoustic propagation path h(t) of the hearing aid by minimizing the error, so that the acoustic propagation path h(t) of the hearing aid gradually approaches the actual acoustic propagation path, including: S21, initialization parameters; S22. For each time t, calculate the error between the output signal of the signal emitted by the speaker of the hearing aid after passing through the acoustic propagation path h(t) of the hearing aid and the signal received by the microphone of the hearing aid; S23, updating the acoustic propagation path h(t) of the hearing aid according to the error at each time t; S24. Return to S22, continue to iterate, and finally obtain the acoustic propagation path h(t) of the hearing aid that is close to the actual acoustic propagation path.

5. The hearing aid anti-lost system according to claim 4, characterized in that: Initialization parameters in S21 include: Initialize the acoustic propagation path h(t) of the hearing aid to 0 or an initial value, denoted as h(0), or collect data for a period of time after the hearing aid is turned on for preliminary estimation; Set the step size μ that controls the update speed. The larger the step size μ, the faster the acoustic propagation path h(t) of the hearing aid is updated, but the more unstable it is; the smaller the step size μ, the slower the acoustic propagation path h(t) of the hearing aid is updated, but the slower the convergence speed is.

6. The hearing aid anti-lost system according to claim 5, characterized in that: In S22, for each time t, the error between the output signal obtained by the signal emitted by the hearing aid speaker through the acoustic propagation path h(t) of the hearing aid and the signal received by the microphone of the hearing aid is calculated: The error e(t) is calculated using the following formula: Where y(t) is the signal received by the hearing aid microphone, is the output signal obtained after the signal x(t) emitted by the hearing aid speaker passes through the acoustic propagation path h(t) of the hearing aid. t is the time, * represents convolution.

7. The hearing aid anti-lost system according to claim 6, characterized in that: In S23, the acoustic propagation path h(t) of the hearing aid is updated according to the error at each time t, including: The acoustic propagation path h(t) of the hearing aid is updated using the following formula: h(t+1)=h(t)+μ·x(t)·e(t); Among them, x(t) is the signal emitted by the hearing aid speaker, t is the time, and μ is the step size, which is used to control the update speed.

8. The hearing aid anti-lost system according to claim 4, characterized in that: In S3, the acoustic propagation path h(t) of the hearing aid is compared with the reference acoustic propagation path h1, and whether the hearing aid is in a wearing state is determined according to the comparison result, including: When the acoustic propagation path h(t) of the hearing aid and the reference acoustic propagation path h1 satisfy the following equation, the hearing aid is judged to be in the wearing state: h(t)-h1|≤δ; Among them, δ is the preset threshold.

9. A hearing aid anti-lost method, applied to the hearing aid anti-lost system according to claim 1, characterized in that: The following steps are involved: S1. The hearing aid determines whether it is in a wearing state through an in-ear detection module based on the difference in acoustic propagation paths formed when the hearing aid is in a wearing state and a non-wearing state; S2, the hearing aid periodically sends wearing status information to the smartphone via the Bluetooth communication module; S3. The smartphone displays the wearing status information sent by the hearing aid, reminds the user when the hearing aid is not worn, and automatically records and stores the current time and location, while continuously monitoring the Bluetooth signal strength; S4. When the Bluetooth signal is disconnected, the smartphone automatically records and stores the time and location of loss for the user to view, and sends an alarm to the user.

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