Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Research Article Estimation of Sound Source Number and Directions under a Multisource Reverberant Environment | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2010 Article ID 870756 14 pages doi 2010 870756 Research Article Estimation of Sound Source Number and Directions under a Multisource Reverberant Environment Jwu-Sheng Hu and Chia-Hsin Yang Department of Electrical and Control Engineering National Chiao-Tung University Lab 905 Engineering Building No. 5 1001 Ta Hsueh Road Hsinchu 300 Taiwan Correspondence should be addressed to Chia-Hsin Yang Received 3 December 2009 Revised 4 April 2010 Accepted 27 May 2010 Academic Editor Sven Nordholm Copyright 2010 . Hu and . Yang. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Sound source localization is an important feature in robot audition. This work proposes a sound source number and directions estimation method under a multisource reverberant environment. An eigenstructure-based generalized cross-correlation method is proposed to estimate time delay among microphones. A source is considered as a candidate if the corresponding time delay combination among microphones gives reasonable sound speed estimation. Under reverberation some candidates might be spurious but their direction estimations are not consistent for consecutive data frames. Therefore an adaptive K-means algorithm is proposed to cluster the accumulated results from the sound speed selection mechanism. Experimental results demonstrate the performance of the proposed algorithm in a real room. 1. Introduction Sound source localization is one of the fundamental features of robot audition for human-robot interaction as well as recognition of the environment. The idea of using multiple microphones to localize sound sources has been developed for a long time. Among various kinds of sound localization methods generalized cross .
