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Optimal Acoustic Sound Localization System Based on a Tetrahedron-Shaped Microphone Array
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  • Journal title : Journal of KIISE
  • Volume 43, Issue 1,  2016, pp.13-26
  • Publisher : Korean Institute of Information Scientists and Engineers
  • DOI : 10.5626/JOK.2016.43.1.13
 Title & Authors
Optimal Acoustic Sound Localization System Based on a Tetrahedron-Shaped Microphone Array
Oh, Sangheon; Park, Kyusik;
This paper proposes a new sound localization algorithm that can improve localization performance based on a tetrahedron-shaped microphone array. Sound localization system estimates directional information of sound source based on the time delay of arrival(TDOA) information between the microphone pairs in a microphone array. In order to obtain directional information of the sound source in three dimensions, the system requires at least three microphones. If one of the microphones fails to detect proper signal level, the system cannot produce a reliable estimate. This paper proposes a tetrahedron- shaped sound localization system with a coordinate transform method by adding one microphone to the previously known triangular-shaped system providing more robust and reliable sound localization. To verify the performance of the proposed algorithm, a real time simulation was conducted, and the results were compared to the previously known triangular-shaped system. From the simulation results, the proposed tetrahedron-shaped sound localization system is superior to the triangular-shaped system by more than 46% for maximum sound source detection.
tetrahedron shape;microphone array;sound localization;coordinate transform;
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