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Wave front design by acoustic contrast control

Wave front design by acoustic contrast control
Wave front design by acoustic contrast control
A way to design and generate desired wave fronts using multiple sound sources is proposed. In principle, any kind of wave front can be described as a sum of orthogonal basis functions, and the wave front of a specific shape can be generated by focusing multiple sources' energy on a single basis function. Once the sound field is decomposed into a set of orthogonal functions, we can apply a conventional focusing algorithm to generate a desired wave front. Extending the concept of energy focusing, we can also generate a wave front packet, whose energy is concentrated on a group of orthogonal functions rather than single component. This enables us to generate a wave front within a desired bound. For this purpose, we employ acoustic contrast control, which focuses sound energy on a selected group of orthogonal functions by enhancing the energy difference between the focal region and others. Various example cases demonstrate how the proposed method can generate a group of planar and spherical wave fronts propagating to different directions. [Work supported by the NRL project of KISTEP and BK21 project initiated by Ministry of Education and Human Resources Development of Korea.]
0001-4966
p.3050
Choi, Joung-Woo
ac8f216e-c9ae-4f33-bfb6-e66315747985
Kim, Yang-Hann
5befa0c8-257c-4eeb-b273-5bff95e66d19
Choi, Joung-Woo
ac8f216e-c9ae-4f33-bfb6-e66315747985
Kim, Yang-Hann
5befa0c8-257c-4eeb-b273-5bff95e66d19

Choi, Joung-Woo and Kim, Yang-Hann (2006) Wave front design by acoustic contrast control. Journal of the Acoustical Society of America, 120 (5), p.3050.

Record type: Article

Abstract

A way to design and generate desired wave fronts using multiple sound sources is proposed. In principle, any kind of wave front can be described as a sum of orthogonal basis functions, and the wave front of a specific shape can be generated by focusing multiple sources' energy on a single basis function. Once the sound field is decomposed into a set of orthogonal functions, we can apply a conventional focusing algorithm to generate a desired wave front. Extending the concept of energy focusing, we can also generate a wave front packet, whose energy is concentrated on a group of orthogonal functions rather than single component. This enables us to generate a wave front within a desired bound. For this purpose, we employ acoustic contrast control, which focuses sound energy on a selected group of orthogonal functions by enhancing the energy difference between the focal region and others. Various example cases demonstrate how the proposed method can generate a group of planar and spherical wave fronts propagating to different directions. [Work supported by the NRL project of KISTEP and BK21 project initiated by Ministry of Education and Human Resources Development of Korea.]

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More information

Published date: 2006
Additional Information: 4th Joint meeting of the Acoustical Society of America and the Acoustical Society of Japan, Honolulu, Hawaii, paper 1pUW13

Identifiers

Local EPrints ID: 43478
URI: https://eprints.soton.ac.uk/id/eprint/43478
ISSN: 0001-4966
PURE UUID: 6c53adc2-c5f5-4601-98b2-8c757ad6e3a7

Catalogue record

Date deposited: 14 Feb 2007
Last modified: 13 Mar 2019 21:09

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Contributors

Author: Joung-Woo Choi
Author: Yang-Hann Kim

University divisions

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