This research evaluates four state-of-the-art acoustic feedback cancellation systems in hearing aids in terms of the cancellation performance, sound quality degradation, and computational complexity. The authors compared a traditional full-band system to a system with a prediction error method in a full band, a subband system, a subband system with frequency shifting, and a recently proposed subband system with a novel probe noise deployment. All systems outperformed the traditional full-band system in cancellation performance, especially the subband system with probe noise is most effective for cancellation. However, in all cases there was a trade-off between performance and computational cost. With a 3-times increase in computation load, the probe noise based cancellation system can be realized that functions even in the most challenging feedback situation.

Authors: Guo, Meng; Jensen, Søren Holdt; Jensen, Jesper
Affiliations: Oticon A / S, Smørum, Denmark; Department of Electronic Systems, Aalborg University, Aalborg, Denmark(See document for exact affiliation information.)
JAES Volume 61 Issue 3 pp. 125-137; March 2013
Publication Date: April 9, 2013

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