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Adaptive feedback cancellation apparatus and method for multi-band compression hearing aids
Adaptive feedback cancellation apparatus and method for multi-band compression hearing aids
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机译：用于多频带压缩助听器的自适应反馈消除装置和方法
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摘要
The present invention relates to removing multi-band adaptive adaptive feedback in a way that can improve the performance of the feedback removal method (multi-band adaptive feedback cancellation) method and apparatus. The proposed method is one obtained by combining the structure and adaptive feedback method for removing a multi-band hearing aid (multi-band hearing aids) that has already been popularized. In a creative way the white noise that has frequency components over the entire band (white noise) the reference input, unlike the conventional method, the signal used for estimating the feedback path, the white noise and band division through the multi-band hearing aid, the band using the reference input of the adaptive filter only the component in which the feedback gain of the divided white noise signal largest band, or the gain of the hearing aid largest band determined to estimate the feedback path. Therefore, acoustic feedback can be made by limiting only the selected frequency band increase the maximum usable gain of the band. This method is most effective because it differs from the case of hearing aids each gain used for each band, and if the gain applied to a particular band is larger than the other bands frequently occurs with multi-band structure.
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