JP2002223500A - Mobile fitting system - Google Patents

Abstract

(57) [Summary] The present invention enables sound quality fitting in accordance with personal hearing characteristics when desired from a mobile device such as a mobile phone, and also provides sound quality fitting according to the purpose of use and environment of use. It is an object of the present invention to provide a mobile fitting system that can make it possible and prevent the number of regular medical examination days from being exceeded. A mobile fitting system according to the present invention connects a mobile device such as a mobile phone to a server computer and an audio-visual chart database via a network so that sound quality fitting can be received from the mobile device such as a mobile phone. It is characterized by.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to mobile telephones such as portable telephones and PHSs and mobile information communication equipments such as personal computers (these are collectively referred to as "mobile equipments" in this specification). A mobile fitting system which is connected to a hearing diagnosis device via a network so that optimal sound quality characteristics can be fitted (hereinafter, referred to as "sound quality fitting") in consideration of the hearing characteristics of a mobile device user. About.

[0002]

2. Description of the Related Art As a conventional hearing compensator, there is one as shown in FIG.
No. 95). In this hearing aid, the hearing aid 10
At 0, the hearing characteristics of the user and the hearing person are stored in the storage unit 107 from the fitting device 109 in advance, and the sound pressure range in which the user is most audible is stored in the gain calculation storage unit 111. The hearing data stored in the storage unit 107 is the minimum audible value of a hearing-impaired person and a hearing-impaired person, and the data stored in the gain calculation storage unit 111 is a sound pressure level that is most audible to the user.

At the time of fitting, a sound pressure level that is most audible to the user for each frequency required for setting is checked. The input sound captured by the microphone 101 is converted into digital data by the input unit 102. The input data is buffered by the input means 102 as necessary, and sent from the analysis means 103 to the auditory compensation means 104. The analysis means 103 analyzes the input data by fast Fourier transform or the like, calculates the power for each frequency band, and sends the analysis result to the control means 105. The control means 105 determines the amplification factor for each frequency band required by the hearing compensating means 104 from the analysis result of the input data and the hearing data of the user.
The data of the amplification factor is sent to 4. The hearing compensation means 104 having obtained the input data and the amplification factor data performs a hearing compensation process on the input data, and sends the processed input data to the output means 106. The output unit 106 converts the processed data into analog data, and outputs the analog data from the earphone 108 as sound.

[0004]

The number of mobile phone (mobile phone + PHS) subscribers has surpassed fixed phones and has become quite surprising. Behind its explosion, its role as a data communication information terminal such as e-mail and the Internet plays a role in addition to its conventional role as a voice communication device. At the present stage, the explosive spread of mobile phones is being driven by young people, but considering its convenience, it is inevitable that it will deeply penetrate the lives of the elderly and disabled. For example, as a communication tool such as a media converter that compensates for hearing loss or reads out e-mail text as voice. In addition, it can be said that it is a tool suitable for elderly and disabled people with reduced physical function as a mobile banking system terminal or a remote control for network information home appliances, which makes it unnecessary to go to a bank. Unlike a fixed telephone, a mobile telephone basically belongs to an individual. Therefore, it is suitable for adjusting to the characteristics of individuals such as the elderly and the disabled.

The sound quality of the present portable telephone as a communication tool is sacrificed because the priority is given to securing the number of communication channels with the increase in the number of subscribers and the amount of transmitted data is kept low. That is the current situation. In particular, it is very difficult to hear under the noise of outdoors such as an environment where a mobile phone is used, and it is hard to say that sufficient clarity is secured for a person whose hearing loss is conspicuous. On the other hand, the IMT-2000, the global standard for next-generation mobile communication systems, is to achieve communication quality equal to or better than the current fixed telephone service.

[0006] Considering the promotion of the spread of mobile phones to the elderly, research and development of mobile phones in consideration of the hearing characteristics of the elderly have not progressed at present. Hearing power decreases with age, and furthermore, since individual differences are large, it is necessary to fit sound quality of a mobile phone user according to his / her own hearing characteristics. In utterance, the second formant frequency of vowels of women and children extends to 3 kHz, and consonant components ([n]: 2
(~ 3kHz), energy is concentrated on high frequency. For clear listening, high frequency components of 2 kHz or more are required,
After 50 years of age, the decline in pure tone hearing with age becomes noticeable at 2 kHz and above. Therefore, it becomes difficult to hear the voice of the telephone.

[0007] Senile deafness due to aging is a sensorineural hearing loss that has no cause other than age, and it is considered that hearing loss due to hearing loss is large among physiological changes in age. Also,
This indicates not only a decrease in pure tone hearing but also a deterioration in distorted word rhyme intelligibility. In general, the disease worsens after age 20, but even people after age 60 may show normal hearing, and the individual differences are large.
The auditory image shows a gradual inclination of the treble disturbance, and the hearing loss starts at a high frequency such as 8000 Hz, and gradually impairs the lower frequency range with aging. In addition to the aging-related decline in physiological functions, external effects due to environmental noise are also conceivable.

[0008] Listening to a mobile phone through a hearing aid does not improve hearing sufficiently. At present, the interference of radio waves from mobile phones to hearing aids has been reported, and measures have been taken, such as inputting the output of the mobile phone to the hearing aid through a line so that the mobile phone itself does not come close to the hearing aid. It is a point that is. If you feel any inconvenience in listening, you should consider using hearing aids. For that purpose, you need a hearing tester that can measure easily and easily. On the contrary,
The current hearing test and fitting of hearing aids require a sound-insulated test room and a hearing test device, which increases the threshold. However, it is desirable that the device can be easily checked with a hand-held device such as a thermometer. Deafness is slowly progressing without awareness, and the individual does not want to recognize hearing loss. For those who have already suffered from hearing loss, regular examinations can confirm that there is no fluctuation in hearing, which has a psychological relief effect that eliminates anxiety about hearing deterioration. Further, periodic inspections and fitting work of hearing aids need to be fine-tuned many times over several days. It is ideal to use several types of hearing aids depending on the environmental noise and the usage scene (multiple meetings, use in theaters and hospitals).

[0009] Current hearing aid fittings require a visit to a vendor for hearing aid adjustment and a visit to a hospital for examination. Regular inspections are required even after the wear is confirmed. Finding the best fitting is not easy, and fine tuning is required many times to make a fitting fit. Several types of hearing aids for each use environment and purpose,
Fitting is required. Thus, fitting takes time and effort. As mobile phones for the elderly, mobile phones with enlarged buttons and liquid crystal displays and simplified functions have been sold so as to be easy to use even for the elderly. Further, by increasing the range of the ringtone or emphasizing the high range of the voice of the other party, the listening in places with much noise is improved. (NTTDoCoMo digital mover P601es, P601ev). As another improvement in sound quality, noise cuts have been attempted to be largely cut by incorporating a noise suppressor in the mobile phone and in the exchange (Tukar cellular clear voice system). Also,
With Clear Voice Plus adopted on some models, 300
In addition to the normal frequency of ~ 3400Hz, by adding a treble range up to about 6000Hz, it is closer to the quality of the real voice (Tuka car clear voice plus).

[0010] Mobile phones are "anytime, anywhere, with anyone."
This facilitated communication between people as typified by a copy. On the other hand, there is a lack of consideration for the other party, such as the situation and the ease of hearing of the other party, because the manners in the public are neglected, such as speaking out loud enough to disturb others, and the situation and expression of the other party are not visible is not it. As communication over the telephone increases, multi-modal direct communication using modes other than hearing is conversely lacking, and it is not possible to obtain background knowledge about the other party and check consistency using multi-modal information For this reason, misunderstandings and beliefs may not be removed and the other party may not be correctly understood. In the future, it is expected that there will be scenes where people will be able to communicate and meet on a mobile phone while in the same building or office. In such a situation, if communication of a sense such as “anytime and anywhere with anyone” develops, there is a possibility that problems such as misunderstanding and misunderstanding increase. It is necessary to use a mobile phone that takes care of the conversation partner and the people around them.

The present invention has been proposed to solve the problems of the prior art, and considers the hearing characteristics of a mobile device user in cooperation with a mobile hearing diagnosis system using a mobile device. An object of the present invention is to provide a mobile fitting system capable of obtaining optimal sound quality characteristics. In addition, the present invention uses a mobile device as a hearing aid terminal, estimates a sound correction characteristic from a diagnosis result by a hearing diagnosis system installed on the Internet, and downloads the sound correction characteristic to the mobile device to automatically perform sound quality fitting of the mobile device. The purpose of the present invention is to provide a system that performs the operation in a specific manner. Another object of the present invention is to utilize a hearing characteristic database diagnosed by the mobile hearing diagnosis system.

[0012]

To achieve this object, a mobile fitting system according to the present invention connects a mobile device to a server computer and a hearing chart database via a network, and operates the mobile device by operating the mobile device. It is characterized by enabling sound quality fitting. In addition, the mobile fitting system according to the present invention connects the speaker-side mobile device and the receiver-side mobile device to a server computer and a hearing chart database via a network, and operates the receiver-side mobile device by operating the receiver-side mobile device. It is characterized in that the sound quality fitting is made possible. Further, the mobile fitting system according to the present invention is characterized in that at least the receiver mobile device is provided with a digital signal processor for sound quality fitting and a fitting unit.

Further, the mobile fitting system according to the present invention is characterized in that a use scene of the receiver-side mobile device can be selected and input. Also,
The mobile fitting system according to the present invention is characterized in that noise is measured by a noise monitoring microphone of the receiver's mobile phone, and a use scene is automatically set. Further, the mobile fitting system according to the present invention monitors the noise in the use environment through the respective noise monitoring microphones of the speaker-side and receiver-side mobile devices, and monitors the noise level of the speaker-side and receiver-side mobile devices. , A place where the user is less likely to be affected by the noise source and the orientation of the user's body are searched for.

Further, the mobile fitting system according to the present invention estimates an optimal sound quality fitting parameter from a selected use scene, acoustic characteristic data of a mobile model, a speaker's voice characteristic, a listener's hearing characteristic and environmental noise. The sound quality fitting parameters can be downloaded to a digital signal processor in the mobile device. In addition, the mobile fitting system according to the present invention provides a “talking list” for the speaker based on the speaker voice characteristics and the listener hearing characteristics registered in the hearing chart database.
The database is created so that the speaker can be automatically advised to the speaker from the list by using a voice / character guide for the most appropriate way of talking according to the situation. In addition, the mobile fitting system according to the present invention temporarily operates the information home appliance in the low noise mode by exchanging information on the activation / operation state of the information home appliance between the mobile device and the nearby information home appliance. It is characterized by being made possible.

Further, the mobile fitting system according to the present invention grasps a change in noise during a call by using a noise monitor of a mobile device of a speaker and a receiver, and updates an optimum parameter according to the change of noise. It is characterized by having done. Further, the mobile fitting system according to the present invention is characterized in that, in the mobile device on the side of the speaker, sampling is performed by increasing the gain of the frequency band in which the hearing ability of the receiver has decreased, and transmitting based on the result. Further, the mobile fitting system according to the present invention is characterized in that the gain is controlled for each frequency band in the listener's mobile device in accordance with the hearing characteristics of the listener. Further, the mobile fitting system according to the present invention is characterized in that the voice of the speaker is multiplied by the hearing characteristics of the listener, converted to sound quality that can be actually heard by the listener, and fed back to the speaker.

[0016]

(Embodiment 1) FIG. 1 shows Embodiment 1 of a mobile fitting system according to the present invention. This system comprises two portable telephones as call terminals and a sound quality fitting control unit. And a hearing chart database (hereinafter, referred to as "hearing chart DB") which stores hearing characteristic fitting parameters on a server computer on the Internet network. In FIG. 1, reference numeral 1 denotes a mobile phone of a user (patient) who receives sound quality fitting (hereinafter, simply referred to as a "mobile phone of a receiver"), and 2 denotes a mobile phone of a speaker (in this specification). Is simply referred to as the "speaker-side mobile phone".) 3 is a server computer, and 4 is a hearing chart DB. Also, C
01 to C02 define the condition selection in step 0 as A01
A19 is the sound quality fitting in step 1,
Also, B01 to B18 indicate the voice call in step 2.

The receiver-side portable telephone 1 and the talker-side portable telephone 2 are different from the conventional portable telephones in that the digital telephone for sound quality fitting is provided between the radio access system processing unit and the A / D converter or the D / A converter. The difference is that a signal processor (hereinafter, referred to as “DSP”) 5, 5 ′ is provided, and a fitting unit 6, 6 ′ for inputting sound quality fitting parameters to the DSP is provided. Other configurations are the same as those of the conventional mobile phone.

The sound quality fitting procedure of the mobile phone is as follows.
The process includes a pre-process, a call pre-process, and a call, and a series of these processes is performed without a mobile phone user recognizing a difference from a normal mobile phone call. First,
As pre-processing, (1) Analyzing the voice band as the speaker and hearing audio chart DB
In order to register in the speaker 4, the speaker and the receiver input voice using their own mobile phones 1 and 2, thereby registering the voice band of the speaker and the receiver. This is because the sound component of the speaker is compared with the hearing characteristics of the receiver, and the characteristics of the sound component of the speaker are reflected on the sound quality fitting characteristics of the speaker-side mobile phone 2 and the listener-side mobile phone 1 to thereby listen. The aim is to improve it. (2) To register the model, performance, and characteristics of the mobile phone, the user registers the mobile phones 1 and 2. The sound quality characteristics of mobile phones differ for each mobile phone model. Therefore, if the model, characteristics, and performance are registered in the hearing chart DB or the mobile phone database created by the manufacturer, it is possible to perform sound quality fitting by absorbing variations in sound quality characteristics between mobile phones by referring to this database. (3) user IDs and hearing characteristics of the mobile phones 1 and 2,
To obtain user information such as sound quality fitting parameters, the user ID is sent to the server computer 3 to confirm the user.

Next, as pre-processing, (1) a use scene of the receiver-side mobile phone 1, for example,
A use scene such as an indoor room, an outdoor room, and a hall is selected from the menu of the receiver-side mobile phone 1 with the operation keys 7 and input.
Microphone 8 for noise monitoring of receiver-side mobile phone 1
The system automatically estimates the acoustic characteristics of the usage environment by measuring and analyzing the noise. (2) The noise monitoring microphones 8-A19, 8 'of the cellular phones 1 and 2 on the speaker side and the receiver side, respectively.
Monitor noise in the use environment through A10. Then, the noise level is set to A20-DSP, respectively.
5-A21 and A11-DSP5'-A12 are displayed on the displays 9 and 9 'of the speaker-side and receiver-side mobile phones 1 and 2. At the same time, server computer 3
Then, the frequency analysis of the noise is performed. Based on the noise gauge, the user can move to a place with low noise or search for the user's body orientation that is not easily affected by the noise source. Considering the deterioration of the hearing characteristics of a listener over a mobile phone, the noise environment of the speaker is not appropriate for listening to the listener because the speaker can sufficiently hear the other party's voice under a certain noise. Not necessarily. If a noise gauge that takes into account the listener's hearing characteristics is used, the location of the speaker and the body orientation with respect to the noise source that the listener can easily hear can be searched.

(3) User ID registered in mobile phone
From A01 through A01 to the hearing chart DB
4, and at the same time, an optimum sound quality fitting parameter is estimated from the selected use scene, mobile phone type data, speaker's voice characteristic, listener's hearing characteristic (user's loudness curve, etc.) and environmental noise. . The estimated sound taking condition fitting parameters and sound quality fitting parameters are respectively represented by A02-A03 to A0.
8, A5 through A02-A13 to A18, DSP 5 'on the sound pickup
And download to the playback side DSP5. (4) When the listener is a hearing-impaired person, the listening rate may be increased by devising the way of speaking. For example, in the case of age-related hearing loss, the hearing ability for high-frequency sounds is particularly reduced, so whispering increases the low-frequency sound and makes it easier to hear. It becomes harder to hear because it shifts to the area. Therefore, a database called "talking list" is created on the server computer 3 based on the speaker's voice characteristics and the listener's hearing characteristics registered in the hearing chart DB4, and the optimum talking method according to the situation is selected from the list in the voice / character guide. It is an effective means to automatically give advice to the speaker side using.

(5) In the DSP units 5 and 5 ', the sound source is localized by convolution of the head-related transfer function and binaural reproduction in consideration of hearing loss, thereby improving the listening under noise. Humans analyze the sound pressure difference and phase of the sound stimulus to the left and right ears to cancel unnecessary noise and perform sound source localization. In the case of hearing impaired, etc., there is a difference in left and right hearing,
Even if there is no left-right difference, if the rear maze function is deteriorated, sound source localization cannot be performed, and it is often difficult to cancel noise. (6) When the listener has sensorineural hearing loss, loss of hair cells and denaturation of the auditory conduction pathway reduce the frequency discrimination ability and the time discrimination ability. Listening is improved by sound quality processing such as conversion of the formant frequency into a frequency band in which the listener's hearing remains, and speech speed conversion. (7) By exchanging information on the starting and operating state with a nearby mobile phone or information home appliance, for example, temporarily stopping home appliances such as a washing machine or a personal computer or operating in a low-noise mode to enable the mobile phone to operate. Improve the conversation environment temporarily.

Next, during a call, (1) the noise monitoring microphones 8, 8 'to A19, A10 of the portable telephones 1, 2 on the speaker side and the receiver side;
Is added to the output waveform of the speech microphone 10 to cancel the noise component. That is, it is possible to cancel the noise component in the opposite phase or reduce the noise by using the utterance microphone 10 having strong directivity and the environmental noise monitoring microphones 8 and 8 ′. (2) The change in noise during a call is grasped by the noise monitors of the cellular phones 1 and 2 on the speaker side and the receiver side, and the optimum sound quality fitting parameter is updated in accordance with the change in noise. The environmental noise changes every moment, and it is important to update the fitting parameters in response to the change.

(3) The speaker's portable telephone 2 performs sampling by increasing the gain of the band in which the hearing ability of the receiver is reduced, and transmits based on the result. What is important here is that not only the amplification gain on the receiver side is adjusted, but also sufficient sound quality is obtained by optimally setting the sound-collecting conditions of the speaker-side mobile phone 2 through B01-B02. It is. For example, a sufficient quantization resolution can be obtained by sampling after the speaker's hearing loss is reduced by the preamplifier (not shown) for each frequency band in the speaker-side mobile phone 2.

(4) The speaker-side portable telephone 2 performs gain control for each frequency band and corrects it according to the hearing characteristics of the receiver. That is, generally, the hearing characteristics of a human deteriorate in a high frequency band. Now, a general sound without correction is distributed as indicated by reference numeral 11 in FIG. Therefore, if the listener's hearing characteristics are degraded in the high frequency band as shown in FIG. 4, voices that the listener cannot hear will appear in the high frequency band voices as they are. Therefore, as shown in FIG. 5, the voice 11 is corrected in the speaker-side mobile phone 2 in consideration of the hearing ability of the receiver. Then, the receiver-side mobile phone 1 outputs the corrected voice 11 as shown in FIG. The corrected speech 11 is actually perceived by the receiver as the distribution 11 falling to the right as shown in FIG. 7, but the inaudible state is eliminated. In general, when the gain is increased by a hearing aid, the dynamic range is compressed so that the result of the gain correction falls within the maximum output sound pressure level (about 100 dB) because the living environment sound is targeted. However, since the mobile phone uses a directional microphone, the input on the speaker's mobile phone is mainly limited to only voice. Generally, the voice has a frequency band distribution as shown by reference numeral 11 in FIG.
As shown in (1), the corrected audio band does not far exceed the level of the low frequency band, and the fitting system does not need to perform dynamic range compression.

FIG. 8 shows a code-excited linear prediction (Code Excited Lin) which is an example of a speech / audio signal encoding technique.
An example of application to coding in a mobile phone using ear prediction is shown. In this code-excited linear prediction, an ABS (Analysis-by-ABS) is performed by a search based on minimizing distortion between an input speech and a signal synthesized from each code pattern of an adaptive codebook, a noise codebook, and a gain codebook.
Synthesis). Before the actual coding, the hearing loss of the listener is corrected through a hearing correction filter 13 that takes the listener's hearing into account. In the distortion minimization, the quantization is performed through a filter 14 having a function of weighting the hearing characteristics of the listener. The quantization noise is shaped so that the quantization distortion is difficult for humans to hear. According to the present invention, an auditory correction filter for correcting the listener's hearing characteristics is added in coding, and the listener's individual auditory weighting is used instead of the conventional filter having a standard human auditory weighting function in distortion minimization. The feature is that a filter having a function is used. For this reason, the speaker-side mobile phone 2 can perform correction in accordance with the hearing ability of the receiver.

In the loudness compensation, the replenishment phenomenon (recr
unit phenomenon), that is,
Non-linear input / output gain control is adaptively performed for each band in consideration of the phenomenon that the change in loudness (sensory amount) due to the change in sound intensity (physical amount) is abnormally large compared to the normal ear. (Adaptive Gain Control) (see FIG. 9).
Also, as shown in FIG. 10, when noise that interferes with voice conversation is mixed, that is, when the frequency band indicated by the arrow in FIG. 10 is contaminated with noise, the band indicated by the arrow containing the noise is mixed. The overall listening is improved by lowering the gain of the to the level of contamination. (5) Compensate for insufficient gain on the speaker side in the receiver side mobile phone 1. That is, if the gain is not sufficiently obtained at the speaker, the gain is further increased at the receiver to compensate for the loudness. When the speaker's mobile phone 2 is not a compatible device of the present system, the loudness compensation is performed only by the DSP unit 5 of the receiver's mobile phone 1.

(6) The voice of the speaker according to B01-B02 in FIG. 1 is multiplied by the hearing characteristic of the listener through A08, and converted into sound quality that can be actually heard by the listener according to B03-B04. The feedback enables the speaker to automatically speak in a voice that is easy for the listener to hear. When using a mobile phone under the noise of a train, it can be loud and disturb others. This is because the user cannot hear his / her own voice due to the noise and does not give feedback for adjusting the volume of the utterance. Then, if the voice of the speaker spread by the microphone is sent to the speaker of the speaker, the volume can be adjusted to an appropriate level. This is also true for karaoke
It is a phenomenon that occurs even in concerts, and it is very difficult to take a pitch if one's voice cannot be heard. On the other hand, putting a speaker in front of the singer and letting him hear the singing voice makes it easier to sing.

FIG. 3 shows the A / D unit and the DS of the speaker-side mobile phone 2 in order to increase the sound quality fitting effect.
FIG. 7 is a block diagram showing a state where a P section divides a channel corresponding to a frequency and performs non-linear fitting for each channel.

(Embodiment 2) FIG. 2 shows Embodiment 2 of the mobile fitting system of the present invention.
Embodiment 2 is different from Embodiment 1 in that only one of the mobile phones, for example, the receiver's mobile phone 1 is a model corresponding to the system of the present invention. Therefore, in the sound quality fitting, since the sound quality fitting work cannot be performed by the speaker-side mobile phone 2, all compensation is performed by the receiver-side mobile phone 1.

The present invention is not limited to those described in the above embodiments, and various modifications can be made. For example,
A mobile phone is becoming a personal organizer such as an address book, schedule management, and task management. These have been stored in the memory inside the telephone, but will be stored in a server or the like in the future, so that they can be browsed and edited from a device other than the mobile telephone without worrying about the memory capacity. From these facts, the hearing characteristics in the hearing chart DB of the present invention allow data to be accessed from anywhere, including a mobile phone, from any terminal other than the mobile phone, as long as the data is connected to the Internet. Therefore, it can be used for information appliances other than mobile phones such as hearing aids and AV systems. In music distribution, it is also possible to search for and download a music source suitable for one's own hearing characteristics. In addition, it is possible to easily reproduce the acoustic environment at home even at the place of stay such as a hotel. As is easily associated with network computers, the entity of AV appliances is not at home,
It is possible that a network audio system with only a simple player will appear at home. By doing so, regardless of fixed audio or mobile audio, the audio environment that is personally fitted can be enjoyed at any time and any place.

In a private room at home, a favorite B
Enjoying a long phone while playing GM is a matter of course, but you can enjoy your favorite BGM as if you were at home.
There is also a demand to enjoy a long phone call while listening to a phone. The DSP of the present invention also provides a service in which the sound quality of the BGM is adjusted so that the favorite BGM does not disturb the conversation, and the conversation can be enjoyed while being reproduced on the mobile phone.
This can be achieved by using the fitting function. BGM
It is also possible to feel like sharing the same space by enjoying the same music distributed as music while synchronizing with the other party. The above-mentioned manner of enjoyment is also possible by using the calculation on the server and the calculation of the downloaded program on the DSP.

[0032]

According to the present invention as described above, the following effects can be obtained. (1) The user (patient) can receive the sound quality fitting from the mobile device such as a mobile phone, when he desires, and until he is satisfied, without going to a hospital or the like equipped with the sound quality fitting device. (2) By regularly announcing the screening date, it is possible to prevent the passing of the screening date. (3) It is possible to perform sound quality fitting taking into account not only the user's hearing characteristics but also the characteristics of the selected use scene and the model of the mobile phone.

(4) The user does not need to judge the use environment and select the characteristics, and the sound quality characteristics optimal for the noise of the use environment can be automatically fitted. At this time, the speaker can instruct the user (patient) who is the receiver to look for a place where the user can easily hear or the body direction with respect to the noise source. (5) It is possible to select the most appropriate way of speaking from the registered speaker's voice characteristics and the listener's hearing characteristics and give advice to the speaker using a voice / character guide, thereby making it possible to speak in the most appropriate way. it can. (6) Since it is not necessary to make a call with a mobile phone or the like through a hearing aid, sound quality is improved. (7) Since the mobile phone also has a function as a substitute for the hearing aid, it is not necessary to carry both the hearing aid and the mobile phone.

(8) Unlike listening to a mobile phone through a hearing aid, not only is the gain of the receiver adjusted for each band, but also the sound pickup conditions such as the microphone sensitivity of the mobile phone for the talker are adjusted for each band. The sound quality and
Improve listening. (9) By collectively managing the hearing characteristics, the speaker's voice band, and the acoustic characteristics of the mobile phone to be used in the database, even if it is necessary to replace the mobile phone or use a plurality of mobile phones depending on the life scene, it is necessary to start over from the beginning. There is no need to perform sound quality fitting work. (10) There is no need to incorporate special functions, and ordinary next-generation mobile phones can be used. A person who needs this function can perform sound quality fitting only by downloading a program from a server computer on the Internet.

(11) A speaker individual identification priority mode and a listening priority mode are provided, and the speaker individual identification priority mode is selected according to the purpose of use, so that appropriate loudness compensation is performed to improve the sound and sound quality to be heard. A decrease in speaker identification can be prevented. (12) In addition to loudness compensation for hearing loss, personal customization, such as reflecting a user's personal preference and preference regarding sound quality, is also possible. (13) By integrating the hearing tester and the sound quality fitting device (hearing aid function) and making the final adjustment in the hearing test and the sound quality fitting using the same circuit / speaker of the mobile phone, two different devices such as a hearing tester and a hearing aid can be used. When used, calibration of acoustic characteristics, which is indispensable, becomes unnecessary. (14) By multiplying the voice of the speaker by the hearing characteristics of the receiver and converting the sound into a sound quality that can be actually heard by the receiver and feeding back the sound quality to the speaker, the speaker can be automatically heard by the listener. You will be able to speak by voice.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing Embodiment 1 of a mobile fitting system according to the present invention.

FIG. 2 is an explanatory diagram showing Embodiment 2 of a mobile fitting system according to the present invention.

FIG. 3 is a block diagram showing a state in which channel division corresponding to a frequency is performed and nonlinear fitting is performed for each channel.

FIG. 4 is a diagram illustrating a state in which gain control is performed for each band by the speaker-side mobile phone in accordance with the hearing ability of the receiver, and illustrates a state before correction.

FIG. 5 is a diagram illustrating a state in which gain control is performed for each band by the speaker's mobile phone in accordance with the hearing ability of the receiver, and illustrates a state after correction.

FIG. 6 is a diagram for explaining a state in which gain control is performed for each band by the speaker-side mobile phone according to the listener's hearing characteristics, and is a diagram illustrating a reproduction state of the receiver-side mobile phone after correction.

FIG. 7 is a diagram illustrating a state in which gain control is performed for each band by the speaker-side mobile phone in accordance with the hearing characteristics of the listener, and illustrates a perceived state of the listener after correction.

FIG. 8 is a block diagram illustrating an example of application to coding in a mobile phone using code-excited linear prediction, which is an example of a speech / audio signal encoding technique.

FIG. 9 is a diagram showing a nonlinear gain control in consideration of a replenishment phenomenon.

FIG. 10 is a diagram illustrating gain down processing of a band contaminated by noise.

FIG. 11 is a diagram showing a conventional digital hearing aid.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Receiver side mobile phone 2 Speaker side mobile phone 3 Server computer 4 Hearing chart database 5, 5 'Digital signal processor 6, 6' Fitting part 7, 7 'Operation keys 8, 8' Noise monitoring microphone 9 , 9 'Display 10 Microphone for utterance 11 Voice 12 Hearing characteristics 13 Hearing correction filter 14 Hearing weighting filter

Claims (13)

[Claims] 1. A mobile fitting system wherein a mobile device is connected to a server computer and a hearing chart database via a network, and sound quality fitting of the mobile device is enabled by operating the mobile device. 2. A speaker-side mobile device and a receiver-side mobile device are connected to a server computer and a hearing chart database via a network, and sound quality fitting of the receiver-side mobile device is performed by operating the receiver-side mobile device. The mobile fitting system according to claim 1, wherein the mobile fitting system is enabled. 3. The mobile fitting system according to claim 1, wherein at least the receiver's mobile device is provided with a digital signal processor for sound quality fitting and a fitting unit. 4. The mobile fitting system according to claim 1, wherein a use scene of the receiver-side mobile device can be selected and input. 5. The apparatus according to claim 1, wherein noise is measured by a noise monitoring microphone of the mobile device on the receiver side, and a use scene is automatically set. The described mobile fitting system. 6. A system in which the noise in the use environment is monitored through the respective noise monitoring microphones of the mobile devices of the speaker and the receiver, and the noise level is displayed on the mobile devices of the speaker and the receiver. ,
The mobile fitting system according to any one of claims 2 to 5, wherein a location that is less affected by the noise source and an orientation of the user's body are searched. 7. An optimum sound quality fitting parameter is estimated from a selected use scene, acoustic characteristics data of a mobile device, a speaker's voice characteristics, a listener's hearing characteristics, and environmental noise, and the sound quality fitting parameters are converted to a mobile device. The mobile fitting system according to any one of claims 1 to 6, wherein the mobile fitting system can be downloaded to a digital signal processor in the mobile terminal. 8. A "talking list" for the speaker is created from the speaker's voice characteristics and the listener's hearing characteristics registered in the hearing chart database, and the optimum talking method according to the situation is selected from the list. The mobile fitting system according to any one of claims 1 to 7, wherein the speaker can be automatically advised to the speaker using a voice / character guide. 9. An information home appliance can be temporarily stopped or operated in a low-noise mode by exchanging information on the activation / operation state of the information home appliance between the mobile device and a nearby information home appliance. The mobile fitting system according to any one of claims 1 to 8, wherein: 10. The system according to claim 1, wherein a change in noise during a call is grasped by a noise monitor of a mobile device on a speaker side and a noise on a receiver side, and an optimum parameter is updated according to the change in noise. The mobile fitting system according to any one of claims 1 to 9. 11. The speaker according to claim 1, wherein the mobile device on the side of the speaker performs sampling by increasing the gain of the frequency band in which the hearing ability of the receiver has decreased, and transmits based on the result. The mobile fitting system according to claim 1. 12. The mobile fitting system according to claim 1, wherein gain control is performed for each frequency band in the receiver's mobile device in accordance with the hearing characteristics of the receiver. . 13. The speaker according to claim 1, wherein the voice of the speaker is multiplied by the hearing characteristic of the receiver, converted to sound quality that can be actually heard by the receiver, and fed back to the speaker.
The mobile fitting system according to claim 12.