CAJ | 학술논문

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。
침대파체방향고계중전통호공솔보법성원방위고계준학성차、방위모호적문제，제출료일충기우원형맥극풍진렬적성원정위개진산법，병진행료실험험증。재해개진산법중，선설계료십이원원형맥극풍진렬，유맥극풍대접수어음신호적시연여상위득도상위선전인자，재장기인입도어음신호적호공솔보중，신정의료원형집성호공솔보，유해공솔보진행성원방위고계。방진여실측실험결과표명，본문적원형집성호공솔보법대성원방위진행고계，고계적준학도고우전통호공솔보법。
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 fac-tor 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 inte-grated cross power spectrum(CICS),finally the sound source orientation can be estimated by CICS algo-rithm.The simulation and practical experiment results show that the proposed algorithm can greatly im-prove the estimated accuracy of source orientation compared with the traditional cross spectrum algo-rithm.