KR102004460B1 - Digital hearing device using bluetooth circuit and digital signal processing - Google Patents

Abstract

A digital hearing device using a Bluetooth circuit and digital signal processing is disclosed. According to an aspect of the present invention, there is provided a digital hearing device comprising: a microphone for receiving a voice signal of a user; And a controller for setting a control parameter based on an analysis result of the micro-received voice signal, wherein the controller uses the Bluetooth module and a digital signal processing (DSP) solution for providing a hearing function, .

Description

TECHNICAL FIELD [0001] The present invention relates to a digital hearing device using a Bluetooth circuit and a digital signal processing,

The present invention relates to a digital hearing device using a Bluetooth circuit and digital signal processing. More particularly, the present invention relates to a hearing aid having a user's hearing profile and an optimized hearing function suitable for a wearer's wearing environment in limited resources of a Bluetooth module using a Bluetooth circuit and digital signal processing To a digital hearing device.

Recently, due to the technological advancement of engineering technology, patients who have not been helped by wearing a hearing aid previously can select a suitable hearing aid and wear it to improve their hearing.

Hearing aids are high-tech medical devices that are always attached to the body even among medical devices. Hearing aids need to be constantly managed according to changes in hearing and should receive A / S for the parts damaged by moisture and foreign substances in the ear. Therefore, hearing aids are considered to be one of the most important technologies among engineering techniques.

Conventional hearing aids were in the form of trumpet-type sound recorders, but now they are used in the form of electric hearing aids that usually amplify the sound. In addition, the hearing aid has a bone marrow formula attached to the shaft portion, but it is usually a structure of prayer type. The sound wave is converted into electric vibration by using a microphone, and enlarged and converted into a sound wave by an earphone.

Recently, digital hearing aids have been developed. Recently, digital hearing aids amplify or control individual low frequency and high frequency bands in a few frequency bands. In other words, digital hearing aids adjust the amplification as much as necessary according to the degree of hearing loss of the user, so they can hear a much clearer sound compared to the conventional amplifier.

In recent years, a hearing aid company has been working hard to develop a powerful processor for hearing aids. Hearing aid-specific processors are made up of chips and components made up of advanced nanotechnology, with processing speeds and memory that are two times faster than conventional processors.

Korean Patent Laid-Open No. 10-2017-0026786 (published on Mar. 19, 2017), "Smart hearing aid system having active noise control function and control device of the hearing aid"

It is an object of the present invention to provide a digital hearing device capable of providing optimized hearing function suited to a user's hearing profile and a wearing environment of a hearing aid in limited resources of a Bluetooth module using a Bluetooth module and digital signal processing.

According to an aspect of the present invention, there is provided a digital hearing device comprising: a microphone for receiving a voice signal of a user; And a controller for setting a control parameter based on an analysis result of the micro-received voice signal, wherein the controller uses the Bluetooth module and a digital signal processing (DSP) solution for providing a hearing function, .

The digital hearing device may include a first microphone and a second microphone positioned at different distances with respect to the mouth of the user.

The digital signal processing solution can utilize wide dynamic range compression (WDRC) to provide a hearing profile of the user and a hearing function suited to the wearing environment of the hearing aid.

The digital signal processing solution includes a feedback cancellation using the suppression technique, an attack and release filter for suppressing sudden and sharp sounds, a wideband dynamic range compression (Wideband Dynamic Range Compression) for comfortable hearing and adaptive noise reduction for the best noise attenuation in varying environments.

The control unit may provide at least one of the control parameter, the amplification value change, the volume control, and the frequency control based on the hearing data of the user and the information related to the analysis result to provide the customized hearing service.

According to an exemplary embodiment of the present invention, a Bluetooth module and a digital signal processing can be used to provide an optimized hearing function according to a user's hearing profile and a wearing environment of a hearing aid in limited resources of the Bluetooth module.

More specifically, the present invention provides a digital signal processing solution for a hearing function of a Bluetooth module, thereby providing a hearing function using limited resources of the Bluetooth module.

1 is a block diagram illustrating a configuration of a digital hearing device according to an embodiment of the present invention.
2A and 2B show an example of a product of a smart hearing device according to an embodiment of the present invention.
FIG. 3 illustrates an application example of a smart hearing device according to an embodiment of the present invention.
FIG. 4 shows a configuration of an embodiment of the control unit shown in FIG.
FIG. 5 shows a configuration of an embodiment of the DSP shown in FIG.
6 is a diagram illustrating an example of a system outline of the digital hearing device of the present invention.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to or limited by the embodiments. In addition, the same reference numerals shown in the drawings denote the same members.

Also, terminologies used herein are terms used to properly represent preferred embodiments of the present invention, which may vary depending on the viewer, the intention of the operator, or the custom in the field to which the present invention belongs. Therefore, the definitions of these terms should be based on the contents throughout this specification.

Digital signal processing (DSP) refers to numerically processing a digitized signal numerically by an algorithm for the purpose of modifying or improving the information signal in a desired direction. In the process of digitizing an analog signal, a discrete signal And is digitized.

The general purpose of a DSP is to measure, filter, and compress continuous real-world analog signals. The first step is to convert the signal from analog to digital form through a process called sampling, then digitize it using the ADC, Change to the number of. However, the required output signal is another analog output signal, which requires a DAC. Even though the process is more complex and has discrete signals than analog processing, the application of computational power to digital signal processing has many advantages over analog processing in many applications.

Conventional hearing aids consist of a microphone, a speaker, an amplifier, and a battery. A conventional hearing aid amplifier means a DSP-Embedded Integrated Circuit. Amplifier IC makers have sold their own DSPs in their ICs. In other words, conventional amplifier manufacturers have operated DSP in a closed fashion. In actual hearing aids, DSP is black box, and program control is only the element that the hearing / audiologist sets for the hearing impaired.

As such, traditional hearing instrument manufacturers buy amplifiers and DSPs from amplifier manufacturers to commercialize hearing aids.

The present invention provides a digital hearing aid using a Bluetooth module by using a Bluetooth module and digital signal processing instead of an amplifier IC used in conventional hearing aids.

Such a Bluetooth module is a generalized part to a Bluetooth earset used by a general person. In general, the price of a module is less than 10,000 won. However, a Bluetooth module does not have a DSP solution for a hearing aid function.

The present invention can provide an optimized hearing function using a Bluetooth module by providing a digital signal processing solution for providing a hearing function using the Bluetooth module. That is, according to the present invention, a sound coming through at least one microphone connected to the Bluetooth module can provide a bluetooth circuit configured in the Bluetooth module and an optimized hearing function using a DSP solution for providing a hearing function.

1 is a block diagram illustrating a configuration of a digital hearing device according to an embodiment of the present invention.

Referring to FIG. 1, the digital hearing device 100 according to an exemplary embodiment of the present invention includes a first microphone for receiving a user's voice signal, and an analysis unit for analyzing an audio signal received from a second microphone And sets control parameters based on the result.

Accordingly, the digital hearing device 100 according to an embodiment of the present invention includes a first microphone 110, a second microphone 120, a transmitter 130, a receiver 140, and a controller 150 .

The first microphone 110 receives a user's voice signal. Also, the second microphone 120 receives the noise signal of the user's surroundings.

At this time, the first microphone 110 and the second microphone 120 are located at different distances with respect to the user's mouth. For example, the first microphone 110 may be positioned adjacent to the mouth of the user to receive a voice signal based on the user's voice, and the second microphone 120 may be positioned relative to the first microphone 110, It can be positioned as far as possible from the user ' s mouth and receive noise signals based on ambient noise.

The first microphone 110 and the second microphone 120 are included in different positions within the digital hearing device 100 according to an embodiment of the present invention. However, the first microphone 110 and the second microphone 120 ) Is oriented to collect uniform sound signals and noise signals, and is characterized by the same for the purpose of eliminating the appropriate noise. Here, the appropriate noise may mean noise and numerical values other than the voice signal and the noise signal collected at the position of the microphone.

Accordingly, the first microphone 110 and the second microphone 120 convert the sensed speech signal and the noise signal into electrical signals, and transmit the converted signal information to the transmission unit 130 or the control unit 150.

The transmitting unit 130 transmits an audio signal including a voice signal and a noise signal received from the first microphone 110 and the second microphone 120.

For example, the transmission unit 130 may be a mobile unit that is carried by a user via at least one short-range wireless communication module such as Bluetooth, Wi-Fi (Wireless Fidelity), Zigbee, The audio signal including the audio signal and the noise signal can be transmitted to the device.

Here, the transmitting unit 130 may correspond to a transmitting function included in the Bluetooth module when corresponding to the Bluetooth module, and the mobile device may be a PC (personal computer), a laptop computer, a smart phone, A terminal device possessed by a user such as a tablet or a wearable computer operates under the control of a web / mobile site or a dedicated application to perform service operation such as service screen configuration, data input, data transmission / Can be performed. Further, the mobile device may refer to an application downloaded and installed in the mobile device.

The receiving unit 140 receives data such as a hearing test, a hearing aid fitting, etc. from an external terminal, for example, a user's smartphone application.

For example, the receiving unit 140 may receive information related to the analysis result analyzed through the machine learning technique on the audio signal from the external server, from at least one of the external server and the mobile device .

At this time, the external server transmits an audio signal including a voice signal and a noise signal received from a mobile device held by a user through at least one of Machine Support (SVM) and kMeans Can be analyzed. However, the machine learning method is not limited to the SVM or kMeans method described above, and it is irrelevant if it is a technique capable of machine learning using an audio signal.

The transmitter 130 and the receiver 140 in the digital hearing device 100 according to an embodiment of the present invention may be used in a cellular telephone network, a wireless local area network (LAN), and / / RTI > and / or other networks, such as a wireless network, such as a wireless local area network (LAN), a wireless network such as a metropolitan area network (MAN), an intranet and / or the Internet, also known as the World Wide Web (WWW)

Such wireless communications may include, but are not limited to, Global System for Mobile Communications (GSM), Enhanced Data GSM Environment (EDGE), wideband code division multiple access (W-CDMA), code division multiple access (CDMA), time division multiple access (TDMA) Bluetooth), Wireless Fidelity (Wi-Fi), Voice over Internet Protocol (VoIP), Wi-MAX, LTE (Long Term Evolution), (IEEE 802.11a, IEEE 802.11b, IEEE 802.11g and / , E-mail protocols such as Zigbee, Z-wave, Bluetooth low energy (BLE), Beacon, Internet Message Access Protocol (IMAP) and / or Post Office Protocol (POP), eXtensible Messaging and Presence Instant messaging such as Instant Messaging and Presence Service (IMPS), Short Message Service (SMS), LoRa, etc., or communication protocols not developed at the filing date of this application . However, a plurality of communication standards, protocols, and techniques may be used for the above-mentioned wireless communication, without being limited thereto.

As shown in FIG. 4, the controller 150 may include a Bluetooth module and a DSP solution for a hearing function (the DSP solution may be included in the Bluetooth module or may be separately provided) And sets control parameters of the hearing aid based on the data.

At this time, the digital hearing device 100 according to an embodiment of the present invention may basically include a personal hearing data of a user who uses a hearing aid. For example, the control unit 150 may include the user's hearing data including the volume and frequency preferred by the user and the amplification value, volume, and frequency range not to feel a sense of heterogeneity. Depending on the embodiment, the data described above may be stored and maintained on a mobile device or an external server.

However, the hearing data is not limited to items such as amplification value, volume and frequency, or numerical values. For example, the hearing data may include non-linear compression information that amplifies small sounds to a large extent and reduces small sounds to a small size, directional information that accurately captures the direction in which the sound is heard, and amplifies the micro- The feedback information that helps the user, and the noise canceling information that reduces noise.

The control unit 150 of the digital hearing device 100 according to an exemplary embodiment of the present invention sets at least one or more control parameters such as an amplification value change, a volume adjustment, and a frequency adjustment based on hearing data of a user, Can be provided.

More specifically, the control unit 150 sets control parameters for a voice signal and a noise signal of a digital signal received from the first microphone 110 and the second microphone 120, And the digital signal for the adjusted signal may be converted into an analog signal and transmitted to the user.

For example, at least one of an amplification value, a volume, and a frequency according to an audio signal received from the first microphone 110 and the second microphone 120 may be preset by the user or out of a preferred reference range . Accordingly, the controller 150 can adjust the balance of at least one of the amplification value, the volume, and the frequency of the voice signal and the noise signal, and converts the digital signal according to the adjusted balance into an analog signal (acoustic energy) Can be provided to the user. That is, the control unit 150 sets the control parameters on the micro-received audio signal based on the analysis result of the micro-input sound using the Bluetooth module and the DSP solution for the hearing aid function, Adjusting the balance of at least one of the control signals, and converting the digital signal of the adjusted signal into an analog signal to provide a customized hearing service to the user.

2A and 2B show an example of a product of a digital hearing device according to an embodiment of the present invention.

More specifically, FIG. 2A shows a front view of a digital hearing device according to an embodiment of the present invention, and FIG. 2B shows a rear view of a digital hearing device according to an embodiment of the present invention.

2A, a digital hearing device 200 according to an embodiment of the present invention includes a first microphone 210, a second microphone 220, and an on / off switch 230.

At this time, the first microphone 210 may be positioned adjacent to the mouth of the user to receive a voice signal of the user's voice, and may be located on the right side of the on / off switch 230, ) Is relatively close to the mouth of the user.

Also, the second microphone 220 may be located as far as possible from the user's mouth in order to receive a noise signal based on the ambient noise according to the position of the user, and may be located on the left side of the on / off switch 230, Is relatively far from the mouth of the user as compared to the user 210.

Further, the directions of the tools (or holes) of the first microphone 210 and the second microphone 220 are the same, which collects the uniform sound signal and the noise signal, respectively, .

2A, a digital hearing device 200 according to an exemplary embodiment of the present invention includes two microphones 210 and 220 having different positions, and a first microphone 210 as a software And the second microphone 220 as a secondary input source, so that different voice signals and noise signals can be uniformly collected.

2A, a digital hearing device 200 according to an embodiment of the present invention includes an on / off switch 230, and an on / off switch 230 is connected to a power source of the smart hearing device 200 (On) or off (off). For example, the smart hearing device 200 may be turned on or off when the user touches, pushes or holds the switch 230 on / off.

Referring to FIG. 2B, the digital hearing device 200 includes a charging module 250 and a speaker 240 according to an embodiment of the present invention.

The smart hearing device 200 according to an embodiment of the present invention may be a rechargeable device and may include a charging module 250.

For example, the smart hearing device 220 according to an embodiment of the present invention may include a rechargeable lithium-ion polymer battery (Li-ion Polymer Battery) and a battery meter of a mobile device, The battery can be charged through the battery 250.

In addition, the digital hearing device 200 according to an embodiment of the present invention can provide a sound converted from an analog signal (acoustic energy) from a digital signal through the speaker 240.

For example, the digital hearing device 200 according to an embodiment of the present invention sets control parameters according to a voice signal and a noise signal collected from the first microphone 210 and the second microphone 220, The volume adjustment, and the frequency adjustment may be converted into an analog signal and may be provided to the user through the speaker 240.

FIG. 3 illustrates an application example of a digital hearing device according to an embodiment of the present invention.

3, the digital hearing device 300 according to an embodiment of the present invention is mounted on the ear of the user 10, and the first microphone 310 and the second microphone 320 are connected to each other Can be located at different distances.

For example, the first microphone 310 is located adjacent to the mouth of the user as compared with the second microphone 320, and can receive voice signals based on the user's voice. On the other hand, the second microphone 320 is positioned as far as possible from the mouth of the user as compared with the first microphone 310, and can receive a noise signal based on the ambient noise according to the position of the user.

3, it can be seen that the first microphone 310 and the second microphone 320 are located close to or far from the mouth of the user based on the on / off switch 330.

Further, the first microphone 310 and the second microphone 320 are included in different positions in the digital hearing device 300 according to an embodiment of the present invention, but the first microphone 310 and the second microphone 320 ) Is oriented to collect uniform sound signals and noise signals, and is characterized by the same for the purpose of eliminating the appropriate noise.

As described above, the digital hearing device according to the present invention provides a DSP solution for providing a hearing function using a Bluetooth module and a Bluetooth module, thereby providing a hearing aid optimized for the user by using a Bluetooth module instead of the amplifier IC have.

4, the controller 150 may include a Bluetooth module 410 and a DSP solution 420. The Bluetooth module 410 is a part that enters a general Bluetooth earset, Lt; / RTI > to those skilled in the art. 4, the Bluetooth module 410 and the DSP solution 420 are shown as separate constituent blocks. However, the DSP solution 420 may be provided in the Bluetooth module 410. FIG.

Since the Bluetooth module 410 is cheaper than the existing hearing aid amplifier IC, the hearing aid manufacturing cost can be reduced when the Bluetooth module 410 is used to provide the hearing aid function.

At this time, the Bluetooth module 410 may be connected to a microphone and a speaker as shown in FIG. 5 to provide an optimized hearing function.

The DSP solution 420 is a solution for providing a hearing function using the Bluetooth module, and the DSP solution of the present invention will be described with reference to FIG.

As shown in FIG. 5, the DSP 420 for providing the hearing function using the Bluetooth module includes an ADC for converting an analog sound, which is an audio signal received through the first microphone and the second microphone, into a digital signal, I / p Buffer for collecting and storing digital signals, a BP filter for filtering the sound that you want to filter, an FFT for converting the output signal of the bandpass filter from the time domain to the frequency domain, Wide Dynamic Range Compression (WDRC) that compresses / deforms to hearing, Equalizer (EQ) that can adjust frequency components, iFFT to re-convert to time domain in frequency domain, A limiter that removes and adjusts the digital signal, and a DAC that changes the digital signal to an analog sound and delivers it to the speaker.

The DSP solution 420 utilizes Wide Dynamic Range Compression (WDRC) to provide an optimal hearing aid function suited to a user's hearing profile and a wearer's wearing environment. The digital solution EQ uses a BP filter, a limiter, , Filter and amplify.

As described above, the DSP solution converts the external sound of a micro input into an electronic signal, and then utilizes a complex technology to remove noise and provide a hearing function optimized for a user, that is, a hearing impaired person. By providing the hearing aid function using the DSP solution in the Bluetooth module, the Bluetooth module can be utilized like a hearing aid.

The DSP solution is described in more detail below.

Describing the digital EQ, the digital EQ is a function that adjusts a specific frequency component in a signal using a low-pass, high-pass, or bandpass digital filter. The digital EQ includes all the parameters of the compensation filter, for example, attenuation or enhancement rate, A parametric equalizer can be used that can independently vary the bandwidth and so on.

For example, the characteristics of the lowpass compensator (LEQ) and the highpass compensator (HEQ) are Ao = -15dB to +15 dB, fo = 300Hz and fs = 48kHz of the lowpass compensator (LEQ) ) Of fo = 300 Hz and fs = 48 kHz. The characteristic of the band pass filter is Ao = -15 dB to +15 dB, and fo = 300 Hz, fs = 48 kHz, BW = 3 oct or fo = 300 Hz, fs = 48 kHz, BW = 1 / 3 oct.

Fast Fourier Transform (FFT) reduces the size (time) of calculations to log N / N. Here, N is the number of signal samples used in the Fourier transform and may mean the size of the DFT or FFT.

The standard method of calculating the continuous Fourier transform can be expressed as Equation (1) below for real and imaginary transforms, respectively.

[Equation 1]

In order to compute the correlation between the time varying signal x [i] and each basis function, Equation (1) first calculates N discrete time variables i (Inner loop), and it is necessary to perform an outer loop on the N k values. Therefore, Fourier transform for N discrete signals requires multiplication and addition using cosine and sine values times N times, and if N becomes large, it takes time to convert.

Fast Fourier transform requires calculation of N / 2 butterfly shapes in the course of log2N, and Correlation w / LUT is the number of cosine and sine values (eg look-up table) have.

In addition, the fast Fourier transform requires a small number of calculations, so that the quantization error according to the calculation is small compared to the direct calculation (for example, correlation method).

To increase the actual frequency resolution, it is necessary to increase the signal extraction time. Since the signal extraction time is (Number of sampling points) / (Sampling frequency), it is necessary to increase the number of signal extraction, do.

In the WDRC (Wide Dynamic Range Compression), the WDRC algorithm compresses the amplified signal into a reduced audible area of the hearing impaired person. The auditory characteristic of the hearing impaired person tends to hear a sufficiently loud sound similar to that of a normal person, . Therefore, the gain of the hearing aid should be increased if the power of the input signal is small, and less if it is large.

However, since the noise reduction algorithm is performed before the WDRC algorithm, the reduced noise power is amplified, which may cause unwanted sounds to be heard by the hearing aid wearer, which may result in inconvenience and poor speech recognition.

Therefore, WDRC, a technique to compensate for the narrowed audible range of the hearing impaired person, needs to adjust the gain according to the size of the noise canceled signal.

The DSP solution in the present invention can have the following main functions.

The DSP solution can be composed of four major components. Specifically, the DSP can be classified into a feedback cancellation using the suppression technique, an attack and release filter for suppressing sudden and sharp sounds, A wideband dynamic range compression for comfortable hearing and adaptive noise reduction for providing best noise attenuation in varying environments.

Speaking of feedback cancellation, one of the many complaints of a hearing aid user is "feedback or howling", and the feedback sound is that the sound output from the hearing aid continues to enter the microphone again. Feedback is a high-valued band peak at a particular frequency, feedback generally occurs at 2500 Hz to 7500 Hz, and in order to reduce feedback at a particular frequency, the DSP of the present invention utilizes frequency band-specific suppression techniques, Set the Preset Amplitude Threshold.

For example, when the sound of a specific frequency passes the threshold value, the output value of the sound is changed according to the adjacent frequency bands, and when the wide dynamic range compression (WDRC) is utilized, Therefore, the feedback cancellation can be further improved.

To describe the attack and release filter, the attack time is the time that the system reacts as the input level increases, and the release time is the time the system responds as the input level decreases. When there is a sharp increase in the input level, the attack and release filter will intentionally reduce the input sound level and gradually return it to the normal level. Ideally, the attack time should be shorter than the release time for effective hearing aid use.

Speaking about Wide Dynamic Range Compression (WDRC), it is not enough to simply raise the volume level as a hearing aid for hearing loss. If you amplify the sound of all frequency bands through linear amplification, Is inevitably lowered. In particular, amplification beyond the controllable dynamic range makes the sound itself uncomfortable. However, it is possible to solve the above problem by dividing the sound into steps such as bass, mid, and treble, and controlling the gain and amplification value for each step in a nonlinear structure. In other words, such a method can compress and transmit ambient sounds within the reduced dynamic range of sensory nerve impairment, the less volume sounds can be heard, the middle volume sounds more comfortably, the larger volume sound It also sounds uncomfortable. Thus, the nonlinear amplification method enables the hearing impaired to hear sounds similar to those heard by a normal hearing person.

Speaking about adaptive noise reduction, the biggest complaint of using hearing aids is noise, which makes it difficult to control effectively with a single preset because the ambient noise of the hearing aid user changes all the time. To use healthy hearing aids, it is necessary to have a wind noise reduction filter as well as a noise reduction function that reduces ambient noise. The DSP of the present invention can analyze the type of noise, frequency characteristics, and the like, and adjust the amplification value of the hearing aid based on the analysis result.

Further, the digital hearing device according to the present invention can improve the usability of the hearing test and the hearing aid fitting by using an external processor such as a smart phone as shown in FIG. 6, and can continuously improve the sound algorithm by utilizing the user data of the back- can do.

For example, in a test mode for a digital hearing device, an external processor such as a smart phone can be used to enhance the usability of the hearing test, and the hearing aid Bluetooth, the Bluetooth of the smartphone, the microphone of the smartphone, You can use screens and applications for testing.

As another example, in the normal mode for the digital hearing device, the above-mentioned resources are not used, and the hearing function can be used by using the Bluetooth module and the DSP solution without the smartphone connection.

A mobile device such as the smartphone shown in Fig. 6 can display a screen including a plurality of items located in each of a plurality of areas through a display unit, and can display, based on haptic or tactile contacts, And may display another screen that includes at least one item related to the function based on the touch-sensitive surface, sensor, or sensor set that accepts input from the user. The mobile device may also receive a user's selection input through an input such as a keyboard, a touch display, a dial, a slider switch, a joystick, a mouse, and the like through an output unit including an audio module, a speaker module, May be output.

In addition, the mobile device can provide information related to a screen for testing the hearing ability of the user in association with the digital hearing device, and various reports related thereto. At this time, the report may be a history indicator or record for a customized hearing service over time.

In addition, the mobile device may include user information and hearing data corresponding to the user information, and may store and maintain an appropriate range of the amplification value, volume, and frequency preferred by the user as numerical values. Furthermore, the mobile device may convert the voice signal and the noise signal from the digital hearing device into a database by matching information related to the analysis result when the voice signal and the noise signal are received.

In addition, the mobile device can turn on or off the power of the digital hearing device according to the user's selection input. Depending on the situation, the mobile device can display the amplification value, volume and / The numerical values such as the frequency can also be manually controlled.

.

As described above, the technology of the present invention can provide an external sound input through a microphone connected to the Bluetooth module by using a Bluetooth circuit provided in the Bluetooth module and a DSP solution for providing a hearing function, . That is, the Bluetooth module can be used as a hearing aid through the present invention, and the DSP solution described above is provided for this purpose.

The apparatus described above may be implemented as a hardware component, a software component, and / or a combination of hardware components and software components. For example, the apparatus and components described in the embodiments may be implemented within a computer system, such as, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable array (FPA) A programmable logic unit (PLU), a microprocessor, or any other device capable of executing and responding to instructions. The processing device may execute an operating system (OS) and one or more software applications running on the operating system. The processing device may also access, store, manipulate, process, and generate data in response to execution of the software. For ease of understanding, the processing apparatus may be described as being used singly, but those skilled in the art will recognize that the processing apparatus may have a plurality of processing elements and / As shown in FIG. For example, the processing unit may comprise a plurality of processors or one processor and one controller. Other processing configurations are also possible, such as a parallel processor.

The software may include a computer program, code, instructions, or a combination of one or more of the foregoing, and may be configured to configure the processing device to operate as desired or to process it collectively or collectively Device can be commanded. The software and / or data may be in the form of any type of machine, component, physical device, virtual equipment, computer storage media, or device , Or may be permanently or temporarily embodied in a transmitted signal wave. The software may be distributed over a networked computer system and stored or executed in a distributed manner. The software and data may be stored on one or more computer readable recording media.

The method according to an embodiment may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions to be recorded on the medium may be those specially designed and configured for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

Claims (5)

A microphone for receiving a user's voice signal and a noise signal; And
And a control unit for setting control parameters based on a result of analysis of the micro-
Lt; / RTI >
The control unit
A hearing aid function using the Bluetooth module is provided by setting the control parameter using a Bluetooth circuit of the Bluetooth module and a digital signal processing (DSP) solution for providing a hearing function using the Bluetooth module,
The control unit
Providing a customized hearing service by setting the control parameters including the amplification value change, the volume adjustment and the frequency adjustment based on the hearing data of the user and the information related to the analysis result,
The microphone
A first microphone and a second microphone positioned at different distances with respect to the mouth of the user and facing the same direction,
The first microphone
Is located adjacent to the mouth of the user and receives the voice signal
The second microphone
Wherein the microphone is located farther away from the first microphone than the mouth of the user,
The digital signal processing solution
A feedback cancellation using the suppression technique that sets a preset Amplitude Threshold using a suppression technique for each frequency band, In this paper, we propose a novel method to control the response time of the system by using the attack and release filters (suppress and sudden and sharp sounds), and to divide the sound into bass and treble stages. Adaptive Noise Reduction, which adjusts the amplification value of a hearing aid based on Wideband Dynamic Range Compression for comfortable hearing and the type and frequency characteristics of the noise analyzed for the speech signal and the noise signal, the best noise attenuation in varying environments It provides,
A digital hearing device that utilizes the Wide Dynamic Range Compression (WDRC) to provide a hearing profile that meets the user's hearing profile and hearing environment. delete delete delete delete

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