KR102250198B1 - Automatically parameter changing hearing aid based on geographical location information, hearing aid system and control method thereof - Google Patents

Abstract

The present invention relates to a method of setting the most suitable hearing aid fitting parameter based on geographic information obtained from a location information sensor. More specifically, the present invention includes a storage unit for storing a plurality of parameters, and a control unit for performing hearing aid based on a predetermined parameter selected from among the plurality of parameters, wherein the predetermined parameter is the It relates to a hearing aid, characterized in that the parameter selected from among a plurality of parameters.

Description

Hearing aid capable of automatically converting parameters suitable for geographic location information, hearing aid system and its control method {AUTOMATICALLY PARAMETER CHANGING HEARING AID BASED ON GEOGRAPHICAL LOCATION INFORMATION, HEARING AID SYSTEM AND CONTROL METHOD THEREOF}

The present invention relates to a hearing aid, and more particularly, to a hearing aid capable of automatically switching between hearing aid settings optimized for various environments based on location information sensed through a location information sensor.

In general, fitting of the hearing aid may be performed by storing the selected fitting parameter in the hearing aid using fitting software in a processing device such as a personal computer (PC). The fitting software is operated based on the audiogram according to the user, and the fitting parameters are determined. If it is determined that the fitting applied in the process of using the hearing aid is not suitable, it may be newly fitted through a hearing test such as a pure tone test. This fitting process has a disadvantage in that the hearing test environment may not match the actual use environment.

Korean Patent Registration No. 10-1557625 provides a method of storing a plurality of fitting parameters and selecting an appropriate one of a plurality of parameters according to a user's selection. However, since the user must always manipulate the switch in order to change the parameter, it is not only inconvenient for the user, and if the user is not proficient, there is a possibility that an appropriate parameter may not be selected.

Korean Patent Registration No. 10-1490331 provides a method for a user to appropriately select a desired parameter from among a plurality of parameters. However, this does not provide optimal settings for various environments because the initial set parameters are not properly set, or if changes are needed to the initially set parameters, only how to set a new parameter is posted.

Therefore, there is a need for research on hearing aids in which the optimal parameters are set in the corresponding place based on the user's location.

It is an object of the present invention to solve the above and other problems. Another object is to provide a hearing aid and a hearing aid system capable of changing location-based parameters while minimizing the power use of the hearing aid.

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned will be clearly understood by those of ordinary skill in the technical field to which the present invention belongs from the following description. I will be able to.

According to an aspect of the present invention to achieve the above or other objects, a storage unit for storing a plurality of parameters; And a control unit for performing hearing aid based on a predetermined parameter selected from among the plurality of parameters, wherein the predetermined parameter is a parameter selected from among the plurality of parameters based on geographic location information. .

In this case, it further includes a receiving unit for receiving data from the mobile terminal, and the control unit may select the predetermined parameter based on the received data.

In this case, the receiving unit is a wireless communication unit for wirelessly exchanging data with the mobile terminal, the data received from the mobile terminal is geographic location information, and the control unit selects a place corresponding to the received geographic location information. Recognized as, it is possible to select a parameter most suitable for the current location.

The geographic location information may be GPS information.

The storage unit stores the plurality of parameters in a manner that stores the parameters in correspondence with each of the plurality of places, and the control unit may select a parameter corresponding to the current place from among the plurality of stored parameters.

In addition, the receiving unit includes a microphone for receiving sound output from the mobile terminal, and the control unit may select the predetermined parameter based on the sound received through the microphone.

The storage unit stores the plurality of parameters in a manner corresponding to each of the plurality of sounds and stores the parameters, and the control unit may select a parameter corresponding to the sound received through the microphone from among the stored plurality of parameters. .

The sound output from the mobile terminal may be a sound corresponding to the current location of the mobile terminal.

In addition, the mobile terminal may store sounds corresponding to each of a plurality of places and output the stored sound corresponding to the current place.

According to another aspect of the present invention to achieve the above or other objects, storing a plurality of parameters; And performing hearing aid based on a predetermined parameter selected from among the plurality of parameters, wherein the predetermined parameter is a parameter selected from among the plurality of parameters based on geographic location information. Provides.

In this case, the step of receiving data from the mobile terminal may be further included, and the step of performing the hearing aid may select the predetermined parameter based on the received data.

In addition, in the receiving step, data is wirelessly received with the mobile terminal through a wireless communication unit, the data received from the mobile terminal is geographic location information, and the step of performing the hearing aid corresponds to the received geographic location information. Recognizing the location to be a current location, it is possible to select a parameter most suitable for the current location.

At this time, the geographic location information may be GPS information.

The storing step includes storing the plurality of parameters in a manner corresponding to each of the plurality of places and storing the parameters, and the performing of the hearing aid selects a parameter corresponding to the current place from among the plurality of stored parameters. I can.

The receiving may include receiving a sound output from the mobile terminal through a microphone, and performing the hearing aid may select the predetermined parameter based on the sound received through the microphone.

And in the storing step, the plurality of parameters are stored in a manner corresponding to each of the plurality of sounds and storing the parameters, and the performing of the hearing aid is performed on the sound received through the microphone among the stored plurality of parameters. You can select the corresponding parameter.

The sound output from the mobile terminal is a sound corresponding to a current place of the mobile terminal, and the mobile terminal stores a sound corresponding to each of a plurality of places, and outputs the stored sound corresponding to the current place. can do.

The effect of the hearing aid according to the present invention will be described as follows.

According to at least one of the embodiments of the present invention, there is an advantage that the hearing aid can be operated with the most optimal environmental parameters in various environments by providing hearing aid parameters suitable for a plurality of preset locations.

In addition, according to at least one of the embodiments of the present invention, there is an advantage that the operation can be automatically changed to an optimal parameter without a user's separate setting input.

Further scope of the applicability of the present invention will become apparent from the detailed description below. However, since various changes and modifications within the spirit and scope of the present invention can be clearly understood by those skilled in the art, specific embodiments such as the detailed description and preferred embodiments of the present invention should be understood as being given by way of example only.

1 is a diagram showing a hearing aid system 10 according to an embodiment of the present invention.
2 is a diagram showing a block diagram of a hearing aid system 10 according to an embodiment of the present invention.
3 is a control flowchart of the hearing aid 100 for setting parameters suitable for a specific place according to an embodiment of the present invention.
4 shows an example of setting a new parameter (step S302) in a manner of switching between a plurality of parameters according to an embodiment of the present invention.
5 is a diagram for explaining a method of storing parameters by matching them to places according to the first and second embodiments of the present invention.
6 is a flow chart of automatic parameter conversion of the hearing aid 100 according to an embodiment of the present invention.
7 shows an example for automatically setting a previously set parameter again according to an embodiment of the present invention.

Hereinafter, exemplary embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but identical or similar elements are denoted by the same reference numerals regardless of reference numerals, and redundant descriptions thereof will be omitted. The suffixes "module" and "unit" for constituent elements used in the following description are given or used interchangeably in consideration of only the ease of preparation of the specification, and do not have meanings or roles that are distinguished from each other by themselves. In addition, in describing the embodiments disclosed in the present specification, when it is determined that a detailed description of related known technologies may obscure the subject matter of the embodiments disclosed in the present specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are for easy understanding of the embodiments disclosed in the present specification, and the technical idea disclosed in the present specification is not limited by the accompanying drawings, and all changes included in the spirit and scope of the present invention It should be understood to include equivalents or substitutes.

Terms including ordinal numbers such as first and second may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another component.

When a component is referred to as being "connected" or "connected" to another component, it is understood that it may be directly connected or connected to the other component, but other components may exist in the middle. It should be. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in the middle.

Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, terms such as "comprises" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof does not preclude in advance.

Hearing aids are a kind of loudspeaker device that is worn on the ear to supplement hearing loss. The principle of hearing aid is to receive sound waves through a microphone, convert them into electrical signals, fit them to fit each individual's audiogram, and convert them into sound waves using a receiver, and then deliver sound signals to the ears.

Fitting of a hearing aid refers to a process of selecting an appropriate hearing aid according to the hearing level of the hearing impaired person and taking measures so that the hearing aided person can hear well by accurately matching the amplification degree and maximum output range for each hearing aid frequency band. In general, fitting of a hearing aid is performed by a method of setting a fitting value (fitting parameter or parameter) to the hearing aid while an expert receives feedback from the hearing-impaired person directly according to the hearing level after receiving a hearing test at a hearing aid store or hospital.

The digital hearing aid fitting sets and changes the fitting parameters of the signal processing chip (DSP chip) of the hearing aid.The hearing aid manufacturers that release digital hearing aids set the first fitting parameters (gain adjustment by frequency, etc.) according to the hearing test results of the hearing impaired person. It provides a fitting program that can be used. Therefore, when a hearing aid is initially purchased, the hearing aid center sets the initial hearing aid fitting value using a fitting program provided by the hearing aid according to his/her hearing threshold.

However, the parameters set in this way are suitable only when the environment is the same as when the parameters are set, and a new parameter needs to be set in a new environment. In other words, it is possible to think of an environment with high ambient noise, such as a construction site, a market, or a road. In such an environment, the previously set parameters may not be considered as optimal parameters.

In particular, if you have to frequently go to the above environment, there is a need to re-set parameters suitable for such environment. For example, consider a case where the employer's job is a construction worker, or a market trader visits such an environment every day.

Therefore, in the present invention, based on geographic location information, it is intended to propose a method capable of automatically performing the parameter setting as described above.

In general, as for geographic location information, information in the form of coordinates is generally obtained through GPS. To this end, in general, a GPS module is provided, and location information about the current location can be periodically obtained from the GPS module.

However, such a GPS module has a disadvantage in that power consumption is significant. That is, in order to continuously acquire location information, it means that it must be able to handle power consumption.

Hearing aids are devices that must be worn on the user's ears, and are characterized in that their size is quite small and light. Therefore, it would be desirable to minimize the battery, which occupies a relatively large volume and weight.

Due to the characteristics of these hearing aids, it is not practical to acquire location information by itself, such as using a GPS module in the hearing aid itself.

Moreover, the GPS module cannot be installed in the existing hearing aid, and a purchase of a new hearing aid equipped with a GPS module will be required. In other words, backward compatibility is impossible.

Accordingly, the present invention proposes a method of optimizing parameters using a GPS module for a mobile terminal such as a smartphone, which is commonly used, without mounting a GPS module in the hearing aid itself.

1 is a diagram showing a hearing aid system 10 according to an embodiment of the present invention. The hearing aid system 10 may include a hearing aid 100 and a mobile terminal 200. The mobile terminal 200 may include a general smartphone or a tablet PC, and the hearing aid 100 may receive data from the mobile terminal 200.

The mobile terminal 200 of the hearing aid system 10 of the present invention may include a location information module and obtain information on the current location of the mobile terminal 200. In this case, the information on the location may be GPS information as described above, and may include information in the form of coordinates (latitude, longitude, etc.) for the current location.

The hearing aid 100 does not have a location information module itself, and utilizes the location information obtained by the mobile terminal 200. At this time, the present invention proposes two methods (first and second embodiments) to receive location information.

In the first embodiment of the present invention, it is proposed to receive location information through wireless communication. That is, the hearing aid 100 and the mobile terminal 200 each have a wireless communication unit, and each wireless communication unit is connected to each other so that the hearing aid 100 may receive the location information obtained by the mobile terminal 200.

Although the power consumption of the Bluetooth module is lower than that of the GPS module, a certain amount of power is required for the wireless communication session to be continuously connected even though the power consumption is lower than that of the GPS module.

Accordingly, in the second embodiment of the present invention, it is proposed to receive sound through a microphone rather than through wireless communication, and to set a parameter corresponding to the received sound. In this embodiment, although the location information itself cannot be transmitted through sound, it is possible to set a parameter suitable for the current location through setting a parameter corresponding to a preset sound.

2 is a diagram showing a block diagram of a hearing aid system 10 according to an embodiment of the present invention.

Referring to FIG. 2, the hearing aid 100 may include a storage unit 110, a sound detection unit 120, a control unit 130, and a sound output unit 140. According to various embodiments, the hearing aid 100 may further include a communication interface unit 150.

In this specification, only the components related to the present embodiment will be described in order to prevent blurring of the features of the present embodiment. Therefore, it can be understood by those of ordinary skill in the art that other general-purpose components may be further included in addition to the components shown in FIG. 1.

The hearing aid 100 may perform signal processing such as amplification of surrounding sounds detected through the sound detection unit 120 to provide the user with a sound compensated for the loss of hearing. Hereinafter, in the specification of the present invention, the hearing aid regenerating by compensating for the loss of sound in this way is referred to as the performance of hearing aid.

The sound detector 120 may detect sound around the hearing aid 100 and obtain a sound signal obtained by converting the detected sound into an electrical signal. The sound detection unit 120 transmits the acquired sound signal to the control unit 130.

According to this embodiment, the sound detection unit 120 may be implemented with a microphone or the like. According to an embodiment, the sound detection unit 120 may further include an analog/digital converter (not shown). An analog/digital converter (not shown) may convert the analog signal obtained from the sound detection unit 120 into a digital signal and output it. Accordingly, the control unit 130 may perform signal processing of a digital signal using a digital signal processor (DSP).

The controller 130 may perform signal processing of a sound signal. The control unit 130 may adjust the output level and frequency of the sound signal.

In addition, the controller 130 may perform signal processing for adjusting an output level for each channel, and the like. For example, the controller 130 may perform signal processing of various types of digital signals using a digital signal processing device. Accordingly, the control unit 130 is capable of signal processing, and complex signal processing such as noise removal or acoustic echo removal is possible.

The sound output unit 140 may amplify and output the sound detected by the sound detection unit 120 according to the output level determined by the control unit 130.

According to this embodiment, the sound output unit 140 may be implemented as a speaker or a receiver. According to an embodiment, the sound output unit 140 may further include a digital/analog converter (not shown). A digital/analog converter (not shown) may convert a digital signal input from the sound output unit 140 into an analog signal and output it.

According to an embodiment, the hearing aid 100 may further include a wireless communication unit 150. The wireless communication unit 150 may connect with the mobile terminal 200 using short-range communication technology. Short-range communication technology according to the present embodiment includes Bluetooth, Radio Frequency Identification (RFID), infrared data association (IrDA), Ultra Wideband (UWB), ZigBee, Wi-Fi Direct (WFD) Near Field (NFC). Communication), etc.

According to an embodiment, the communication interface unit 150 may transmit and receive data through a wired, wireless network, or wired serial communication. In this case, the network includes, but is not limited to, the Internet, a local area network (LAN), a wireless local area network (LAN), a wide area network (WAN), a personal area network (PAN), and the like, It can be understood by those of ordinary skill in the art to which the present embodiment belongs to that it may be another type of network capable of transmitting and receiving information.

According to an embodiment of the present invention, the mobile terminal 200 is connected to the hearing aid 100, and the hearing aid 100 may receive the location information acquired by the mobile terminal 200.

As described above, the wireless communication unit 150 is only used in one embodiment of the present invention, and will not be an essential configuration. That is, in another embodiment of the present invention, it is possible without the use of the wireless communication unit 150.

The storage unit 110 according to an embodiment of the present invention may store a plurality of parameters.

In the present specification, parameters may include, for example, an amplification level according to a frequency band, a compression ratio according to a frequency band, a movement of a specific frequency band, white noise, or environmental noise. As described above, the parameters may include both a fitting parameter based on an audiogram according to an individual user, an actual user environment, and a fitting parameter reflecting the user's subjective characteristics. For example, the parameter may include a frequency band in which a hearing loss is caused, an amplification level or a compression ratio according to the hearing loss frequency band. In addition, the parameters may include environmental noise that the user reacts sensitively or does not react, a voice signal that the user prefers, or environmental noise according to the user's use environment.

Hereinafter, a method of setting a parameter suitable for a specific place will be described with reference to FIG. 3.

3 is a control flowchart of the hearing aid 100 for setting parameters suitable for a specific place according to an embodiment of the present invention.

A user who wears the hearing aid 100 will have parameters that are basically fitted when purchasing the hearing aid 100. However, among places that you frequently go to, there may be places that are not suitable as basic fitting parameters. Then, the user may want to adjust some of the basic fitting parameters at that location and use them or set other parameters. In that case, the user may change and store the parameters of the hearing aid 100 according to the location. The storage process will be described in detail.

In step S301, the hearing aid 100 receives a parameter change command from the user. The parameter change command means a command in which a user wants to change a parameter used in the place to another parameter, and may be an input such as pressing a button provided in the hearing aid 100.

When a parameter change command is received, the process moves to step S302 to receive a new parameter setting input. In this case, the new parameter may be generated by partially modifying the basic fitting parameter described above. Some modifications may mean modifications such as lowering or increasing an amplification factor in a specific frequency band.

Alternatively, in the above-described fitting process, a new parameter may be set in such a manner that a plurality of other parameters in addition to the basic fitting parameter are stored together, and a plurality of parameters are switched according to a user's selection.

4 shows an example of setting a new parameter (step S302) in a manner of switching between a plurality of parameters according to an embodiment of the present invention.

As shown in the drawing, it is assumed that the first to fifth parameters are stored together with the basic fitting parameters in the storage unit 110.

Each time the switching button provided in the hearing aid 100 is pressed once, the basic fitting parameter may be sequentially switched from the first parameter to the first parameter, and from the first parameter to the second parameter. The user can change the parameter by pressing the switch button until the parameter being converted is satisfactory.

At this time, the first to fifth parameters may be preset parameters suitable for an environment commonly encountered in daily life. For example, the first parameter may be a parameter suitable for a market or a subway station where a lot of people are concentrated, the second parameter is a parameter suitable for a place with a high ceiling and a sound, such as an airport, and the third parameter is a construction site or near a road. If a specific noise is continuously generated, such as, suitable parameters can be considered.

In particular, the first and fifth parameters may be parameters obtained by partially modifying the basic fitting parameter when the user's basic fitting parameter is set in the fitting step. This is because the first to fifth parameters must also reflect the degree of hearing according to the user.

When the change button is sequentially pressed and then the parameter is changed to the user's desired parameter, the user will be able to set the parameter. For example, the user may press the set button to set the parameter as a new parameter.

When a new parameter setting input is received from the user in this manner, the controller 130 may store the corresponding new parameter (step S303).

At this time, in the storing step, the controller 130 may not simply store, but may match and store the location. In other words, when you revisit the location again, it is to automatically apply the set parameters.

5 is a diagram for explaining a method of storing parameters by matching them to places according to the first and second embodiments of the present invention.

As shown in the drawing, a screen asking whether to reset the current parameter may be displayed on the display of the mobile terminal 200, and if the user selects the'Yes' button, the parameter may be matched to a place and stored. will be.

To this end, in the first embodiment of the present invention, it is possible to receive location information from the mobile terminal 200 through the wireless communication unit 150 and store the set parameters to correspond to the location information. For example, when the'Yes' button is selected, the mobile terminal 200 may transmit location information to the hearing aid 100 through the wireless communication unit 150.

Since the location information is actually coordinate information indicating a point, a parameter may be stored corresponding to an area (hereinafter referred to as a place) included within a predetermined radius around the point. The mobile terminal 200 may also be able to store that a new parameter has been set at a corresponding place.

In the second embodiment of the present invention in which the wireless communication unit 150 is not used as described above, places are matched through sound. In other words, matching is performed in a manner of generating a sound to identify the corresponding place.

That is, similarly, when the'Yes' button is selected as shown in FIG. 5, the mobile terminal 200 outputs any one of a plurality of preset sounds. The sound output in this way may be transmitted to the hearing aid 100.

When there is sound received through the sound detection unit 120 of the hearing aid 100, the control unit 130 matches the sound and stores the parameter. The mobile terminal 200 may also be able to store that a new parameter has been set at a corresponding place.

At this time, the sound for identifying the place may be a sound outside the audible frequency. Or, it may be a sound that doesn't happen often around you. This is because, in the process of storing parameters as described above, it may be difficult for the hearing aid to identify sound due to external noise.

So far, the method of storing parameters by matching them to places has been described. Hereinafter, a method of automatically switching parameters when visiting a corresponding place will be described.

6 is a flowchart of automatic parameter conversion of the hearing aid 100 according to an embodiment of the present invention.

As described above, the mobile terminal 200 continuously acquires location information. This means that the current location is continuously monitored in real time.

As a result of monitoring, when the parameters are matched and enters the set place (preset place), the mobile terminal 200 transmits location information to the hearing aid 100 or outputs a sound to identify the place.

7 shows an example for automatically setting a previously set parameter again according to an embodiment of the present invention.

As a result of monitoring the location information, the mobile terminal 200 transmits the location information to the hearing aid 100 through the wireless communication unit when it detects that it enters the preset place, or a sound for identifying the preset place (corresponds to the current place). Sound) can be output.

For example, a screen informing that there is a preset parameter is output through the display of the mobile terminal 200, and when the'Yes' button is selected, location information is transmitted to the hearing aid 100 or a sound is output.

In the case of location information, it will be possible to receive it through the wireless communication unit 150, and it is obvious that the sound can be received through the sound detection unit 120. That is, the receiving unit for receiving data from the mobile terminal 200 may mean the wireless communication unit 150 or the sound detection unit 120.

When the above data is received from the mobile terminal 200 (step S601), the hearing aid 100 may search the storage unit 110 for a parameter corresponding to the received data, and perform hearing aid using the searched parameter.

That is, the controller 130 selects a parameter corresponding to the received data from among a plurality of parameters stored in the storage unit 110 and performs hearing aid with the selected parameter.

The embodiment of the hearing aid according to the present invention has been described above, but this is described as at least one embodiment, and the technical idea of the present invention and its configuration and operation are not limited thereto. The scope is not limited/limited by the drawings or the description referring to the drawings. In addition, the concepts and embodiments of the invention presented in the present invention may be used by those of ordinary skill in the art as a basis for modifying or designing a different structure in order to perform the same object of the present invention. , Modified or changed equivalent structure by a person of ordinary skill in the technical field to which the present invention belongs is bound by the technical scope of the present invention described in the claims, and does not depart from the spirit or scope of the invention described in the claims. Various changes, substitutions, and changes are possible within the limit.

Claims (20)

A mobile terminal having a location information module; And
Including a hearing aid for storing a plurality of fitting parameters,
The hearing aid,
A switching button for switching between the plurality of fitting parameters;
A setting button for selecting a fitting parameter converted by the change button;
A storage unit for storing sound and fitting parameters in correspondence;
A microphone for detecting sound output from the mobile terminal; And
And a control unit for performing hearing aid based on the selected fitting parameter,
In the parameter setting mode, when the fitting parameter reset input is received, the mobile terminal outputs a first sound from among a plurality of sounds, stores the location where the reset input is received and the output first sound in correspondence with each other, and stores the hearing aid Is stored in correspondence with the first sound output from the mobile terminal and the selected fitting parameter,
In the parameter automatic switching mode, when the mobile terminal enters a predetermined place, the mobile terminal outputs a second sound corresponding to the predetermined place, and the hearing aid stores a fitting parameter corresponding to the second sound output from the mobile terminal. Selecting and controlling the control unit to perform hearing aid based on the selected fitting parameter,
Hearing aid system.
In the control method of a hearing aid system comprising a mobile terminal having a location information module and a hearing aid storing a plurality of fitting parameters,
Performing a parameter setting mode for storing a fitting parameter selected by a user from among the plurality of fitting parameters in correspondence with a location; And
Comprising the step of performing a parameter automatic switching mode for automatically setting a stored fitting parameter corresponding to a predetermined place,
The step of performing the parameter setting mode,
Switching, by the hearing aid, between the plurality of fitting parameters when a switch button provided in the hearing aid is pressed;
Selecting, by the hearing aid, a fitting parameter converted by the change button when a setting button provided in the hearing aid is pressed;
Outputting, at the mobile terminal, a first sound from among a plurality of sounds when a fitting parameter reset input is received from the user;
Sensing, by the hearing aid, a first sound output from the mobile terminal;
Storing, by the mobile terminal, a place where the reset input is received and the first sound in association with each other; And
And storing, by the hearing aid, the first sound and the selected fitting parameter,
The step of performing the parameter automatic switching mode,
Outputting a second sound stored in correspondence with the predetermined place when the mobile terminal enters the predetermined place;
Sensing, by the hearing aid, a second sound output from the mobile terminal; And
And performing hearing aid based on a fitting parameter stored in correspondence with the second sound output from the mobile terminal by the hearing aid,
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