Multiple Sound Source Direction Estimation and Sound Source Number Estimation

• Main Authors: Cheng-Kang Wang, 汪正剛
• Other Authors: Jwu-Sheng Hu
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/23799296724314561439

碩士 === 國立交通大學 === 電機與控制工程系所 === 96 === This work proposes a multiple sound source direction estimation and sound source number estimation method by using distributed microphone array without the information of sound velocity. This work also proposes an eigenstructure-based generalized cross correlation method (ES-GCC) for estimating time delay between microphones. Upon obtaining the time delay information, the sound source direction and velocity can be estimated by least square method. In multiple sound source case, the time delay combination among microphones is arranged such that the estimated sound speed value falls within an acceptable range. By accumulating the estimation result of sound source direction and using adaptive K-means++ algorithm, we can estimate the sound source number and direction for each source. Experimental results are carried out in the real environment to evaluate the performance of the proposed algorithm.