基于球麦克风阵列的多声源定位方法  

Localization of multiple acoustic sources based on spherical microphone arrays

作　　者：钟强[1] 黄青华[1] 

机构地区：[1]上海大学通信与信息工程学院,上海200072

出　　处：《计算机工程与应用》2012年第5期149-152,共4页Computer Engineering and Applications

基　　金：国家自然科学基金(No.61001160);教育部博士点基金(No.20093108120018)

摘　　要：通过球麦克风阵列采集高阶声场的声压信息,采用球谐函数分解声场并建立信号模型,应用MUSIC算法提取出声源的方位。由于MUSIC算法在信号源相干性比较高,特别是声源比较接近时,其分辨率会严重下降,提出了一种基于空间平滑的瓣分块方法来提高定位的效果。仿真实验采用了一个72元的球阵,实验结果表明:提出的方法能同时有效地确定声场中多个声源的位置,能比较好地对抗噪声的影响。In this paper sound pressure is sampled through spherical microphone array.Sound field can be decomposed by spherical harmonics and a signal model is built.Based on the model,MUSIC algorithm is adopted to estimate the positions of multiple acoustic sources.However this method fails when the signals are coherent,especially near to each other.Therefore a new petal-blocking method is proposed based on spatial smoothing to improve localization effect.A 72-element spherical microphone array is applied to the simulation.The results show that this method can localize multiple coherent sources and resist noise.

关 键 词：球麦克风阵列 球谐函数 多信号分类(MUSIC)算法 空间平滑 

分 类 号：TN912.3[电子电信—通信与信息系统]