Kohei Hayashida, Masato Nakayama, Takanobu Nishiura, and Yoichi Yamashita
Microphone array, Sound source localization, Time delay of arrival estimation
We study near-field sound source localization, for which two-dimensional multiple signal classification (2D-MUSIC) has already been developed. However, this method requires a lot of elapsed time because it processes in each frequency. A localization method based on cross-power spectrum phase analysis (CSP) in the near field has also been developed. However, its localization accuracy is degraded by noise sources and reverberations. To overcome these problems, we propose a new localization method based on time delay and subspace methods. Experimental results of an evaluation experiment carried out in a conference room demonstrate that the method improves localization accuracy with less elapsed time in a diffused noise environment.
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