Measurement of sound absorption in rooms
作者:
J. B. Moreland,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1977)
卷期:
Volume 61,
issue 2
页码: 476-483
ISSN:0001-4966
年代: 1977
DOI:10.1121/1.381287
出版商: Acoustical Society of America
数据来源: AIP
摘要:
Existing methods for determining the sound absorption in rooms usually require some knowledge of the room dimensions. If sound‐pressure‐level measurements are made at various distances from a small source (such measurements herein referred to as a walk‐away test) the room sound absorption can be deduced provided the variation of sound pressure level with distance can be described by the simple equation SPL=PWL (sound power level)+10 log10(Q/4πr2+4/A′), which is commonly credited to Beranek. Unlike the reverberation time and estimated area methods (JSiαi), a walk‐away test can be used to determine the room absorption where either the room volume or wall areas and the absorption coefficients are uncertain or for rooms which are acoustically coupled to other rooms.
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