Near Field Sound Source Localization based on Time Delay and Subspace Separation

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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