Acoustic response of a rigid-frame porous medium plate with a periodic set of inclusions

The acoustic response of a rigid-frame porous plate with a periodic set of inclusions is investigated by a multipole method. The acoustic properties, in particular, the absorption, of such a structure are then derived and studied. Numerical results together with a modal analysis show that the additi...

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Bibliographic Details
Published in:The Journal of the Acoustical Society of America 2009-08, Vol.126 (2), p.685-693
Main Authors: Groby, J.-P., Wirgin, A., De Ryck, L., Lauriks, W., Gilbert, R. P., Xu, Y. S.
Format: Article
Language:English
Subjects:
Acoustics
Engineering Sciences
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Mechanics
Physics
Structural acoustics and vibration
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Summary:The acoustic response of a rigid-frame porous plate with a periodic set of inclusions is investigated by a multipole method. The acoustic properties, in particular, the absorption, of such a structure are then derived and studied. Numerical results together with a modal analysis show that the addition of a periodic set of high-contrast inclusions leads to the excitation of the modes of the plate and to a large increase in the acoustic absorption.
ISSN:0001-4966
1520-8524
DOI:10.1121/1.3158936