Author:

Keywords:

DSP, adaptive filters, ADSP, antenna arras, beamforming, biomedical signal processing, broadband, signal enhancement, SISTA, Noise, Noise reduction, Hearing, Hearing Aids

Abstract:

© 2002 EUSIPCO. This paper presents the theoretical analysis of 2 different adaptive noise reduction algorithms for twin-microphone hearing aids. A first noise reduction algorithm is based on a beamformer technique [1] and a second is based on optimal filtering and singular value decomposition (SVD) [2]. On the one hand, it is shown that the SVD-based technique gives a robust solution against unmatched microphone characteristics. On the other hand, the beamformer technique has a better robustness against voice activity detector (VAD) errors. 1