A Computational Model for Sound Field Absorption by Acoustic Arrays

In this paper we discuss the sound absorption property of arrays of micro-acoustic actuators at a control surface. We use the wave equation over the half plane for the velocity potential with a boundary dissipation by a proportional pressure feedback law along the half plane boundary. The feedback g...

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Bibliographic Details
Published in:Journal of intelligent material systems and structures 2002-04, Vol.13 (4), p.231-240
Main Authors: Banks, H. T., Cole, D. G., Furati, K. M., Ito, K., Pinter, G. A.
Format: Article
Language:English
Subjects:
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Mechanical contact (friction...)
Physics
Solid mechanics
Structural and continuum mechanics
Tribology and mechanical contacts
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Summary:In this paper we discuss the sound absorption property of arrays of micro-acoustic actuators at a control surface. We use the wave equation over the half plane for the velocity potential with a boundary dissipation by a proportional pressure feedback law along the half plane boundary. The feedback gain over the array is described by a distributed shape function. We develop a computational method based on the Fourier transform and employ it for analyzing and evaluating the decay rate of acoustic energy. Specifically, we carry out computations for a diffusive random initial field and report on our resulting numerical findings.
ISSN:1045-389X
1530-8138
DOI:10.1177/104538902761696814