Manipulation of sound intensity within a selected region using multiple sources

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In this paper, the authors propose a method of enhancing sound in a selected region by controlling multiple sources. The physical variables. of enhancing sound have not been well defined, but we may consider basic acoustic variables such as acoustic potential energy, sound power or intensity. A method of maximizing sound potential energy was found to be very straightforward [J.-W. Choi and Y.-H. Kim, J. Acoust. Soc. Am. 111, 1695 (2002)]. In this paper, the authors attempt to control the sound power or intensity of a zone in a desired direction. It is noteworthy that control of the direction and magnitude is needed to enhance the sound intensity. This control requires a new definition of the, direction and magnitude of spatially distributed intensity. For this purpose, the authors introduce two different kinds of cost functions, and the theoretical formulation based on the new definitions show the possibility of maximizing the sound intensity of a selected zone in a desired direction. (C) 2004 Acoustical Society of America.
Publisher
ACOUSTICAL SOC AMER AMER INST PHYSICS
Issue Date
2004-08
Language
English
Article Type
Article
Keywords

FIELD

Citation

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, v.116, no.2, pp.843 - 852

ISSN
0001-4966
DOI
10.1121/1.1768945
URI
http://hdl.handle.net/10203/3822
Appears in Collection
EE-Journal Papers(저널논문)ME-Journal Papers(저널논문)
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