There has recently been an increasing interest in the generation of a sound field that is audible in one spatial region and inaudible in an adjacent region. The method proposed here ensures the control of the amplitude and phase of multiple acoustic sources in order to maximize the acoustic energy difference between two adjacent regions while also ensuring that evenly distributed source strengths are used. The performance of the method proposed is evaluated by computer simulations and experiments with real loudspeaker arrays in the shape of a circle and a sphere. The proposed method gives an improvement in the efficiency of radiation into the space in which the sound should be audible, while maintaining the acoustic pressure difference between two acoustic spaces. This is shown to give an improvement of performance compared to the contrast control method previously proposed.
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July 2010
July 16 2010
Maximization of acoustic energy difference between two spaces
Mincheol Shin;
Mincheol Shin
Institute of Sound and Vibration Research (ISVR),
University of Southampton
, University Road, Highfield, Southampton S017 1BJ, United Kingdom
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Sung Q. Lee;
Sung Q. Lee
a)
IT Convergence and Components Laboratory, Nano Convergence Sensor Team,
Electronics Telecommunication Research Institute (ETRI)
, 138 Gajeongno, Yuseong-gu, Daejeon, 305-700, Republic of Korea
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Filippo M. Fazi;
Filippo M. Fazi
Institute of Sound and Vibration Research (ISVR),
University of Southampton
, University Road, Highfield, Southampton S017 1BJ, United Kingdom
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Philip A. Nelson;
Philip A. Nelson
Institute of Sound and Vibration Research (ISVR),
University of Southampton
, University Road, Highfield, Southampton S017 1BJ, United Kingdom
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Daesung Kim;
Daesung Kim
Department of Mechatronics,
Gwangju Institute of Science and Technology (GIST)
, 261 Cheomdan-gwagiro, Buk-gu, Gwangju, 500-712, Republic of Korea
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Semyung Wang;
Semyung Wang
Department of Mechatronics,
Gwangju Institute of Science and Technology (GIST)
, 261 Cheomdan-gwagiro, Buk-gu, Gwangju, 500-712, Republic of Korea
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Kang Ho Park;
Kang Ho Park
IT Convergence and Components Laboratory, Nano Convergence Sensor Team,
Electronics Telecommunication Research Institute (ETRI)
, 138 Gajeongno, Yuseong-gu, Daejeon, 305-700, Republic of Korea
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Jeongil Seo
Jeongil Seo
Department of Broadcasting and Telecommunications Media Research,
Electronics Telecommunication Research Institute (ETRI)
, 138 Gajeongno, Yuseong-gu, Daejeon, 305-700, Republic of Korea
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a)
Author to whom correspondence should be addressed. Electronic mail: hermann@etri.re.kr
J. Acoust. Soc. Am. 128, 121–131 (2010)
Article history
Received:
June 04 2009
Accepted:
May 08 2010
Citation
Mincheol Shin, Sung Q. Lee, Filippo M. Fazi, Philip A. Nelson, Daesung Kim, Semyung Wang, Kang Ho Park, Jeongil Seo; Maximization of acoustic energy difference between two spaces. J. Acoust. Soc. Am. 1 July 2010; 128 (1): 121–131. https://doi.org/10.1121/1.3438479
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