The effect of a periodic absorptive strip arrangement on an interior sound field in a room

In this paper we study the effect of periodically arranged sound absorptive strips on the mean acoustic potential energy density distribution of a room. The strips are assumed to be attached on the room's surface of interest. In order to determine their effect, the mean acoustic potential energy density variation is evaluated as the function of a ratio of the strip's arrangement period to wavelength. The evaluation demonstrates that the mean acoustic potential energy density tends to converge. In addition, a comparison with a case in which absorptive materials completely cover the selected absorptive plane shows that a periodic arrangement that uses only half of the absorptive material can be more efficient than a total covering, unless the frequency of interest does not coincide with the room's resonant frequencies. Consequently, the results prove that the ratio of the arrangement period to the wavelength plays an important role in the effectiveness of a periodic absorptive strip arrangement to minimize a room's mean acoustic potential energy density. (C) 2005 Acoustical Society of America.
Publisher
ACOUSTICAL SOC AMER AMER INST PHYSICS
Issue Date
2005-02
Language
ENG
Keywords

FINITE-SIZE ABSORBERS; RADIATION IMPEDANCE; AREA; DEPENDENCE; PATCHES

Citation

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, v.117, no.2, pp.763 - 770

ISSN
0001-4966
DOI
10.1121/1.1852547
URI
http://hdl.handle.net/10203/3849
Appears in Collection
ME-Journal Papers(저널논문)
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