Dual microphone solution for acoustic feedback cancellation for assistive listening
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The method proposed in this paper improves the identification and cancellation of the feedback path by making the adaptive canceller robust against the impact of the desired speech signal. The proposed method allows for the canceller's coefficients to be continuously adapted allowing it to track variations in the feedback path even in the presence of the desired signal. It suggests the use of dual microphones and dual adaptive filters arranged in such a way that allows the speech signal to be identified and removed from the adaptation process. This results in a more robust solution which was verified by our experiments and evaluations. The perceptual evaluation of speech quality (PESQ) measure was also used to show that the proposed method results in better signal quality.
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Nakagawa, C.; Nordholm, S.; Yan, Wei-Yong (2015)Acoustic feedback cancellation in hearing aids makes use of adaptive filters to continuously identify and track variations to the feedback path. One of the biggest problems remaining in using adaptive filters for feedback ...
Renato, C.; Nakagawa, Carlos; Nordholm, Sven; Albu, F.; Yan, Wei-Yong (2014)In this paper we are studying the use of two microphones for acoustic feedback cancellation in hearing aids. With the two microphones approach, an additional microphone is employed toprovide added information bout the ...
Combining null-steering and adaptive filtering for acoustic feedback cancellation in a multi-microphone earpieceSchepker, H.; Tran, Linh Thi Thuc; Nordholm, Sven; Doclo, Simon (2017)© EURASIP 2017. Commonly adaptive filters are used to reduce the acoustic feedback in hearing aids. While theoretically allowing for perfect cancellation of the feedback signal, in practice the adaptive filter solution ...