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 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.
Groby
J-P
JP
CMAP, CNRS/Ecole Polytechnique, UMR7641, Palaiseau Cedex, France. jeanphilippe.groby@fys.kuleuven.be
Wirgin
A
A
De Ryck
L
L
Lauriks
W
W
Gilbert
R P
RP
Xu
Y S
YS