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Method and equipment for full frequency domain digital hearing aid

A full frequency domain, digital technology, applied in the field of full frequency domain digital hearing aids, can solve problems such as no comprehensive consideration

Inactive Publication Date: 2009-12-02
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that current digital hearing aids only focus on solving a certain aspect of hearing impairment without comprehensive consideration of various factors affecting the use effect, and at the same time improve the processing speed, reduce resource occupation, and reduce energy consumption, the embodiment of the present invention provides a comprehensive Frequency domain digital hearing aid method and device

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  • Method and equipment for full frequency domain digital hearing aid
  • Method and equipment for full frequency domain digital hearing aid
  • Method and equipment for full frequency domain digital hearing aid

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Embodiment 1

[0119] An embodiment of the present invention provides a full frequency domain digital hearing aid method, see figure 1 , the method includes:

[0120] 101: Obtain the input voice signal of the front and rear dual microphones, divide the input voice signal into frames, and perform Fourier transform on the input voice signal after the frame division, to obtain the frame-divided voice domain signal;

[0121] 102: Recognize the voice scene on the framed voice domain signal, and obtain the voice scene category of the input voice signal;

[0122] 103: When the voice scene of the input voice signal is noisy voice, perform voice detection on the framed voice domain signal, and judge whether each frame in the framed voice domain signal is a voice frame or a noise frame;

[0123] 104: Perform dual-microphone beamforming processing on the framed voice domain signal after the voice detection;

[0124] 105: Perform wind noise processing on the voice signal formed by dual-microphone beam...

Embodiment 2

[0172] In order to solve the problem that current digital hearing aids only focus on solving a certain aspect of hearing impairment without comprehensive consideration of various factors affecting the use effect, and at the same time improve the processing speed, reduce resource occupation, and reduce energy consumption, the embodiment of the present invention provides a comprehensive Frequency-domain digital hearing aid method, unless otherwise specified, all processing in the embodiment of the present invention is performed in the frequency domain, see figure 2 , the specific implementation process is as follows:

[0173] 201: Perform buffering, frame division, windowing and FFT (Fast Fourier transform, Fast Fourier Transform) calculation on the input voice signal. The specific implementation process is as follows:

[0174] 201a: Buffering and windowing the input voice signal, and padding the framed voice signal with zeros;

[0175] Wherein, in the embodiment of the presen...

Embodiment 3

[0317] An embodiment of the present invention provides a full frequency domain digital hearing aid device, see Figure 10 , the device consists of:

[0318] The framing module 301 is used to obtain the input voice signal of the front and rear dual microphones, and divide the input voice signal into frames, and carry out Fourier transform to the input voice signal after the frame division, so as to obtain the frame-based voice audio domain signal;

[0319] Scene recognition module 302, is used for carrying out the recognition of speech scene to sub-frame speech frequency domain signal, obtains the speech scene classification of input speech signal;

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Abstract

The embodiment of the invention provides a method for full frequency domain digital hearing aid, which comprises the following steps: firstly, acquiring input voice signals of front and back two microphones and performing framing, Fourier transformation and voice scene type recognition; secondly, when voice is mixed with noises, performing noise detection of subframe voice frequency domain signals, beamforming of the two microphones, wind noise processing and inhibition of other noises, compacting the dynamic ranges of frequency domains and inhibiting acoustic feedback; and finally performing the Fourier transformation and overlap-add to obtain output voice signals. The embodiment of the invention also discloses equipment for full frequency domain digital hearing aid. Through the proposal provided by the embodiment of the invention, the problem that the prior digital hearing aid focuses on solving only one aspect of hearing disorder rather than comprehensively take all factors influencing use effect into consideration is solved. Meanwhile, the embodiment of the invention provides a proposal for full frequency domain digital hearing aid. The method, the equipment and proposal have the advantages of quick processing, less resource occupation, low energy consumption and the like.

Description

technical field [0001] The invention relates to the fields of digital signal processing and medical equipment, in particular to a full-frequency domain digital hearing aid method and equipment. Background technique [0002] Sound is an important means of human communication. However, due to congenital and acquired reasons, some people's hearing is damaged and they become deaf patients. Among them, digital hearing aids, as the most important means of hearing rehabilitation, bring a pleasant world to hearing-impaired patients, and are also an important symbol of people's high-quality life. [0003] Traditional analog hearing aids usually use linear amplifying circuits. Due to technical limitations, there are disadvantages such as static noise, howling, large volume, and high power consumption, and satisfactory results cannot be obtained. Digital hearing aids overcome these problems well. However, due to the different reasons for the hearing impairment of the human ear, the s...

Claims

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Application Information

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IPC IPC(8): G10L21/02G10L15/00G10L15/02H04R25/00
Inventor 梁维谦翁海波夭淼董明易安希刘国旗刘润生
Owner TSINGHUA UNIV
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