Howling canceling for high gain speakerphone systems exploiting the loudspeaker redundancy

Jingjing Zhang; Qinye Yin; Pengcheng Mu; Tianheng Song; Wei Wang; Junchao Wu

doi:10.1117/12.913480

1 October 2011 Howling canceling for high gain speakerphone systems exploiting the loudspeaker redundancy

Jingjing Zhang, Qinye Yin, Pengcheng Mu, Tianheng Song, Wei Wang, Junchao Wu

Proceedings Volume 8285, International Conference on Graphic and Image Processing (ICGIP 2011); 82856I (2011) https://doi.org/10.1117/12.913480
Event: 2011 International Conference on Graphic and Image Processing, 2011, Cairo, Egypt

Abstract

Howling of an audio amplifying system is annoying, which may occur when a closed-loop is formed for amplified signals. In this paper, we exploit the space diversity offered by the loudspeaker redundancy and develop a new howling canceling approach for high gain speakerphone systems. The amplified waves are weighted at the two loudspeakers to achieve self-cancellation at the microphone after the propagation. As a result, the echo waves can be completely eliminated at the microphone, which avoids any feedback that yields the howling. Results of simulation and hardware test show effectiveness of the method.

Citation Download Citation

Jingjing Zhang, Qinye Yin, Pengcheng Mu, Tianheng Song, Wei Wang, and Junchao Wu "Howling canceling for high gain speakerphone systems exploiting the loudspeaker redundancy", Proc. SPIE 8285, International Conference on Graphic and Image Processing (ICGIP 2011), 82856I (1 October 2011); https://doi.org/10.1117/12.913480

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