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A Combined Acoustic Feedback and Noise Cancellation Algorithm for Digital Hearing Aids  

Lee, Haeng-Woo (남서울대학교 정보통신공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.35, no.11C, 2010 , pp. 911-916 More about this Journal
Abstract
This paper proposes a new algorithm to cancel the acoustic feedback and noise signals in digital hearing aids. The proposed algorithm combines the feedback canceller to remove acoustic feedback signals and the noise canceller to reduce background noises. The feedback canceller is implemented by normal adaptive FIR filter, and the noise canceller is implemented by using the Wiener solution in frequency domain. This noise canceller has the transfer function presented by the power spectral density of signals. To verify the performances of the proposed algorithm, the simulations were carried out for the system. As the results of simulations, it was proved that we can advance 10.85dB output SNR on the average for the forward path gain of 0dB, and 11.04dB output SNR on the average for the forward path gain of 6dB, in the case of using the proposed algorithm.
Keywords
보청기;궤환 제거;잡음 제거;적응 알고리즘;적응 필터;
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