Sound Absorption Coefficient Changes Of Acoustical Plates Made Of Expanded
Perlite In Moist Environment
Author(s)
S. Yilmazer
Abstract
Sound absorption coefficient changes of
acoustical plates made of expanded perlite in
moist environment
S .Yilmazer
Bilkent University, Department of Interior Architecture and
Environmental Design, Bilkent Ankara, Turkey
Abstract
Expanded perlite is a porous, lightweight, fire resistant and moisture retaining
material with sound and thermal insulation properties. In this research, acoustical
behaviour of plates made of expanded perlite was studied experimentally. Since
these plates are used for sound absorption the acoustical parameter selected for
this study is "sound absorption coefficient". Preliminary experiments indicated
that moisture reduced the sound absorption coefficient on plates and there is not
much significant difference between the dry and 50% humid conditions.
However, there is a significant difference in acoustical properties for the 50% -
95% humid conditions. Thus, this interval was studied in detail. A number of
expanded perlite plates having different mixtures were prepare
Keywords
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