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An Efficient Adaptive Feedback Cancellation for Hearing Aids
Sang Min LEE In Young KIM Young Cheol PARK
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/09/01
Print ISSN: 0916-8508
Type of Manuscript: LETTER
Category: Speech and Hearing
feedback cancellation, decorrelation, all-pass filter, hearing aids,
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Howling is very annoying problem to the hearing-aid users and it limits the maximum usable gain of hearing aids. We propose a new feedback cancellation system by inserting a time-varying decorrelation filter in the forward path. We use a second-order all-pass filter with control parameters whose time variation is implemented using a low-frequency modulator. A noticeable reduction of weight-vector misalignment is achievable using our proposed method.