A speech enhancement technique based on taper microphone array structure is proposed for small volume applications under strong noise environment. The technique takes full advantage of the good noise cancellation performance of the taper bottom microphone array against the taper top microphone in the taper structure and combining with improved multiplex cross talk resistant noise cancellation algorithm which employed voice activity detector (VAD) and two stage adaptive filter to realize speech enhancement in strong noise environment. Both the theoretic analysis and simulation results have verified the rationality and advantages of the taper structure. Simulation results indicate that this improved noise cancellation method using for this taper microphone array can significantly increases the SNR,and has small damage to the speech as well as remarkable speech enhancement effect in strong noise environment.
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孙科伟,李建海,杨海东,宋博.基于锥形麦克风阵列的语音增强技术研究[J].压电与声光,2014,36(2):306-310. SUN Kewei, LI Jianhai, YANG Haidong, SONG Bo. Study on Speech Enhancement Technique Based on Taper Microphone Array[J]. PIEZOELECTRICS AND ACOUSTOOPTICS