基于锥形麦克风阵列的语音增强技术研究  

Study on Speech Enhancement Technique Based on Taper Microphone Array

作　　者：孙科伟[1] 李建海[1] 杨海东[1] 宋博[1] 

机构地区：[1]空军工程大学航空航天工程学院,陕西西安710038

出　　处：《压电与声光》2014年第2期306-310,共5页Piezoelectrics & Acoustooptics

基　　金：航空科学基金资助项目(20095596014)

摘　　要：针对强噪音环境中小体积应用场合下的语音增强,设计了一种基于锥型麦克风阵列结构的语音增强方法。该方法充分利用锥形结构中锥底麦克风阵列对锥顶麦克风的良好噪声抵消性能,结合端点检测器和两级自适应滤波器设计的多通道抗串扰噪声抵消算法,实现了强噪音环境中的语音增强。理论分析和仿真验证了锥形结构设计的合理性和优越性,仿真结果表明,改进的多路抗串扰噪声抵消算法应用于此锥形结构的麦克风阵列中可提高语音信号的信噪比,对语音的损伤小,在强噪音环境中语音增强效果显著。A speech enhancement technique based on taper microphone array structure is proposed for small vol- ume 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 combi- ning 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 envi-ronment.

关 键 词：麦克风阵列 多路抗串扰 噪声抵消 语音增强 

分 类 号：TN643[电子电信—电路与系统]