基于圆形麦克风阵列的声源定位改进算法  

Improved Algorithm of Sound Source Localization Using Circular Microphone Array

作　　者：郭业才[1,2] 宋宫琨琨 吴礼福[1,2] 孙心宇[1,2] 王丽华[3] 

机构地区：[1]南京信息工程大学电子与信息工程学院,南京210044 [2]江苏省大气环境与装备技术协同创新中心,南京210044 [3]南京信息工程大学信息与控制学院,南京210044

出　　处：《数据采集与处理》2015年第2期344-349,共6页Journal of Data Acquisition and Processing

基　　金：江苏省高校自然科学基金(13KJA510001)重大资助项目;江苏省高校科研成果产业化推进(JHB2012-9)资助项目;江苏省高校"信息与通信工程"优势学科建设工程(2014)资助项目;江苏省六大人才高峰(2008026)资助项目;国家自然科学基金青年基金(51405241)资助项目

摘　　要：针对波达方向估计中传统互功率谱法声源方位估计准确性差、方位模糊的问题,提出了一种基于圆形麦克风阵列的声源定位改进算法,并进行了实验验证。在该改进算法中,先设计了十二元圆形麦克风阵列,由麦克风对接收语音信号的时延与相位得到相位旋转因子,再将其引入到语音信号的互功率谱中,新定义了圆形集成互功率谱,由该功率谱进行声源方位估计。仿真与实测实验结果表明,本文的圆形集成互功率谱法对声源方位进行估计,估计的准确度高于传统互功率谱法。In view of the problems of inaccurate localization and ambiguous orientation of traditional cross power spectrum（CS）in direction of arrival estimation,an improved algorithm of sound source localization using a circular microphone array is proposed and demonstrated by practical experiments.In the proposed algorithm,the twelve-element circular microphone array is firstly designed,then the phase rotation factor is defined by combining the time delay with the phase information of speech signals received by each pair of microphone and introduced into the traditional cross power spectrum to define novel circular integrated cross power spectrum（CICS）,finally the sound source orientation can be estimated by CICS algorithm.The simulation and practical experiment results show that the proposed algorithm can greatly improve the estimated accuracy of source orientation compared with the traditional cross spectrum algorithm.

关 键 词：波达方向 互功率谱 时间延迟 相位旋转因子 麦克风阵列 

分 类 号：O429[理学—声学]