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Probabilistic structure from sound and probabilistic sound source localization

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2 Author(s)
Chi-Hao Lin ; Dept. of Comput. Sci. & Inf. Eng., Nat. Taiwan Univ., Taipei ; Chieh-Chih Wang

Auditory perception is one of the most important functions for robotics applications. Microphone arrays are widely used for auditory perception in which the spatial structure of microphones is usually known. The structure from sound (SFS) approach addresses the problem of simultaneously localizing a set of microphones and a set of acoustic events which provides a great flexibility to calibrate different setups of microphone arrays. However, the existing method does not take measurement uncertainty into account and does not provide uncertainty estimates of the SFS results. In this paper, we propose a probabilistic structure from sound (PSFS) approach using the unscented transform. In addition, a probabilistic sound source localization (PSSL) approach using the PSFS results is provided to improve sound source localization accuracy. The ample results of simulation and experiments using low cost, off-the-shell microphones demonstrate the feasibility and performance of the proposed PSFS and PSSL approaches.

Published in:

Advanced robotics and Its Social Impacts, 2008. ARSO 2008. IEEE Workshop on

Date of Conference:

23-25 Aug. 2008

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