Directional radiation pattern in structural-acoustic coupled system

In this paper we demonstrate the possibility of designing a radiator using structural-acoustic interaction by predicting the pressure distribution and radiation pattern of a structural-acoustic coupling system that is composed by a wall and two spaces. If a wall separates spaces, then the wall's role in transporting the acoustic characteristics of the spaces is important. The spaces can be categorized as bounded finite space and unbounded infinite space. The wall considered in this study composes two plates and an opening, and the wall separates one space that is highly reverberant and the other that is unbounded without any reflection. This rather hypothetical circumstance is selected to study the general coupling problem between the finite and infinite acoustic domains. We developed an equation that predicts the energy distribution and energy flow in the two spaces separated by a wall, and its computational examples are presented. Three typical radiation patterns that include steered, focused, and omnidirected are presented. A designed radiation pattern is also presented by using the optimal design algorithm. (c) 2005 Acoustical Society of America.
Publisher
ACOUSTICAL SOC AMER AMER INST PHYSICS
Issue Date
2005-07
Language
ENG
Keywords

CLOSED RECTANGULAR CAVITY; ACTIVE CONTROL; SOUND-TRANSMISSION; NOISE TRANSMISSION; MODAL-ANALYSIS; PANEL; FLUID; PLATE; ENCLOSURE; MEMBRANE

Citation

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, v.118, no.1, pp.92 - 103

ISSN
0001-4966
DOI
10.1121/1.1925850
URI
http://hdl.handle.net/10203/3853
Appears in Collection
ME-Journal Papers(저널논문)
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