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http://dx.doi.org/10.7776/ASK.2012.31.4.214

Design of Multichannel Spherical Loudspeaker Array for the Spatial Sound Manipulation  

Kang, Dong-Soo (KAIST 기계공학과 소음 및 진동제어 연구센터 (NOVIC))
Choi, Jung-Woo (KAIST 기계공학과 소음 및 진동제어 연구센터 (NOVIC))
Lee, Jung-Min (KAIST 기계공학과 소음 및 진동제어 연구센터 (NOVIC))
Kim, Yang-Hann (KAIST 기계공학과 소음 및 진동제어 연구센터 (NOVIC))
Publication Information
The Journal of the Acoustical Society of Korea / v.31, no.4, 2012 , pp. 214-224 More about this Journal
Abstract
The objective of this paper is to design multichannel spherical loudspeaker array by considering various positioning methods such as Gaussian grid, Lebedev grid and packing method. For the spatial sound manipulation, which is to make desired sound field by controling multiple sound sources, the Kirchhoff- Helmholtz integral states that sound fields can be reproduced in terms of infinite control sources on the integral surface. But since we cannot control infinite number of sources for the implementation, we have to allocate finite number of sound sources which can approximately act as infinite number of sources. To manipulate sound field inside of a sphere (which is typical example of three dimensional array) by controlling sound sources on the surface, three methods of allocating sound sources, which are Gaussian grid, Lebedev grid and packing method, are reviewed. For each geometry, the performances of manipulation rendered by time-reversal operator and higher-order ambisonics are compared.
Keywords
Spatial sound manipulation; Sound field reproduction; Higher-order ambisonics; Time-reversal operator; Lebedev grid; Loudspeaker array system;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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