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Method and equipment with separating compressor in control hearing aid

A compressor and band separation technology, applied in hearing aids, gain control, amplification control, etc., to achieve the effect of avoiding spectrum ambiguity

Inactive Publication Date: 2008-09-03
WIDEX AS
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Therefore implementing a gain-limited unit may not

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  • Method and equipment with separating compressor in control hearing aid
  • Method and equipment with separating compressor in control hearing aid
  • Method and equipment with separating compressor in control hearing aid

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Embodiment Construction

[0032] [0032] The present invention relates to an improved method whereby an input sound signal is filtered into a number of frequency bands to obtain a band-separated signal and to compress the band-separated signal in a hearing aid for hearing impaired persons in order to achieve not only speech audibility and intelligibility, Also spectral ambiguity in the output sound signal is reduced.

[0033] [0033] FIG. 2 shows a block diagram of a first embodiment of a hearing aid according to the invention. The signal path of the hearing aid 200 includes an input transducer or microphone 214, which transforms an acoustic input sound signal into an electrical input sound signal 226; a band separation filter 202, which receives the electrical input sound signal and splits it into a number of frequency bands to obtain a band splitter. Separate signals 218-1, 218-2, . . . , 218-n. The individual band-separated signals are then provided to signal level estimating units 210-1, 210-2, . . ...

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Abstract

A method and hearing aid for processing sound signals for hearing impaired persons by providing multi-band compression processing is described. An input sound signal is filtered into a number of frequency bands to obtain band split signals. A signal level for each of the band split signals is determined and the frequency bands are arranged into a number of groups. Based on the signal levels in each of the groups, a compressor input level for a number of band split compressors each associated to one of the frequency bands is calculated. A compressor gain for each band split compressor is determined based on the corresponding compressor input signal and the band split signals are amplified with the corresponding compressor gain to produce an output sound signal.

Description

technical field [0001] [0001] The present invention relates to controlling sound signals, and more particularly to methods and hearing aids for processing sound signals, especially for hearing-impaired persons, by controlling the input level of a band split compressor in a hearing aid. equipment. Background technique [0002] [0002] Most hearing loss in hearing-impaired persons is frequency-related. This means their hearing loss varies with frequency. Therefore, it is advantageous to utilize frequency-dependent amplification and compression over a wide dynamic range when compensating for hearing loss. Hearing aids therefore usually divide the input sound signal, in particular the speech signal received by the input transducer of the hearing aid, into different frequency intervals, which are also referred to as frequency bands. In this way the input sound signal for each frequency band can be individually adjusted according to the hearing loss of a certain frequency band. ...

Claims

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Application Information

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IPC IPC(8): H04R25/00H03G3/20
Inventor C·帕卢丹－米勒C·路德维希森A·维卡达姆斯高
Owner WIDEX AS
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