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http://dx.doi.org/10.7840/KICS.2011.36C.7.413

A Feedback and Noise Cancellation Algorithm of Hearing Aids Using Dual Microphones  

Lee, Haeng-Woo (남서울대학교 정보통신공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.36, no.7C, 2011 , pp. 413-420 More about this Journal
Abstract
This paper proposes a new adaptive algorithm to cancel the acoustic feedback and noise signals in the binaural hearing aids. The convergence performances of the proposed algorithm are improved by updating coefficients of the feedback canceller after the speech signal is cancelled from the residual signal with dual microphones. The feedback canceller firstly cancels the feedback signal from the microphone signal, and then the noise canceller reduces the noise by the beamforming method. To assure that binaural hearing aids converge stably, the left-sided hearing aid only is converged firstly, next the right-sided hearing aid only is converged. To verify performances of the proposed algorithm, simulations were carried out for a speech. As the results of simulations, it was proved that we can advance 14.43dB SFR(Signal to Feedback Ratio) on the average for the feedback canceller, 10.19dB SNR(Signal to Noise Ratio) improvement on the average for the noise canceller, in case that this algorithm is used.
Keywords
보청기;궤환 제거;잡음 제거;빔포밍;마이크 배열;
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