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Self-adaptive hearing compensation method

A compensation method and adaptive technology, applied in hearing aids, electrical components, etc., can solve the problem of not achieving satisfactory results, and achieve the effect of increasing audibility, reducing distortion, and reducing distortion

Active Publication Date: 2016-02-03
SOUTHEAST UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Since then, members of the research group have further studied the algorithm and applied it to hearing aids and cochlear implants. The research results show that the method does not achieve satisfactory results in noisy environments

Method used

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Embodiment Construction

[0035] The technical solutions of the present invention will be further described below in conjunction with the drawings and embodiments.

[0036] figure 1 Shown is a flowchart of an adaptive hearing compensation method according to an embodiment of the present invention. From figure 1 It can be seen that the method includes the following steps:

[0037] S1: Preprocessing the input voice signal;

[0038] The speech signal is passed through the gammatone filter bank to obtain the decomposed channel signal; the envelope of the channel signal is obtained by Hilbert transform. The frequency response of the 16 passway gammaton filter bank that the present invention adopts is as figure 2 shown. The gammatone filter bank is selected for channel decomposition of the input signal for the following reasons: 1) the perceived loudness of the signal in each channel after the gammatone filter bank is decomposed by the human ear is the same; 2) the delay of the filter bank is low , es...

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Abstract

The invention discloses a self-adaptive hearing compensation method. The self-adaptive hearing compensation method comprises the following steps of firstly performing multi-channel decomposition for input signals by utilizing a gammatone filter group; then determining a compensation method based on a dynamic range of the signals in the channels and a hearing range of a hearing loss patient; if channel signals after being subjected to linear gain treatment are still within the hearing range of the patient, performing hearing compensation by using linear amplification so as to reduce distortion; otherwise, compensating by using dynamic range compression so as to add audibility. In addition, in order to reduce signal distortion caused by dynamic range compression and increase SNR (Signal to Noise Ratio) of an output signal in a noise environment, the self-adaptive compression method is adopted for hearing compensation so as to enable a compression ratio to be close to 1 to the greatest extent. Compared with existing hearing compensation methods, the self-adaptive hearing compensation method has higher intelligibility of compensated voice and obtains very strong practicability.

Description

technical field [0001] The invention belongs to the field of speech signal processing, and in particular relates to an adaptive hearing compensation method. Background technique [0002] Hearing compensation is one of the key algorithms in the hearing aid signal processing algorithm, and the quality of the algorithm directly affects the performance of the hearing aid. Hearing compensation is to amplify the input sound signal so that the loudness felt by the hearing-impaired patients is the same as that felt by the normal hearing person. Early hearing aids used linear amplification technology to amplify the signal. Linear amplification uses the same gain for signals with different sound pressure levels. If the output sound pressure level exceeds the discomfort threshold, the maximum output is limited by peak clipping. Commonly used linear amplification formulas include Berger's law, POGO, Libby step, NAL-R, etc. The advantage of linear amplification is that for input signal...

Claims

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Application Information

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IPC IPC(8): H04R25/00
Inventor 王侠梁瑞宇王青云陶华伟赵力邹采荣
Owner SOUTHEAST UNIV
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