Howling Canceling for High Gain Speakerphone Systems Exploiting the Loudspeaker Redundancy

摘要：

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.

关键词： high-gain audioamplifying system howling cancellation

作者: Jingjing ZHANG Qinye YIN Pengcheng MU Tianheng SONG Wei WANG Junchao WU

作者单位: Ministry of Education Key Lab for Intelligent Networks and Network Security Xian Jiaotong University Xian, China 710049

会议类型: 国际会议

会议名称: 2010 International Conference on Signal and Information Processing(2010年IEEE信号与信息处理国际会议 ICSIP2010)

会议地点: 长沙

会议语种:英文

页码: 377-381

在线出版日期: 2010-12-14（万方平台首次上网日期，不代表论文的发表时间）