The reduction of blast noise with aqueous foam
作者:
Richard Raspet,
S. K. Griffiths,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1983)
卷期:
Volume 74,
issue 6
页码: 1757-1763
ISSN:0001-4966
年代: 1983
DOI:10.1121/1.390260
出版商: Acoustical Society of America
关键词: foams;noise;scaling laws;acoustics;demolition;control
数据来源: AIP
摘要:
Experiments were performed to investigate the potential of water‐based foams to reduce the farfield noise levels produced by demolitions activity. Measurements of the noise reductions in flat‐weighted sound exposure level (FSEL), C‐weighted sound exposure level (CSEL), and peak level were made for a variety of charge masses, foam depths, and foam densities (250:1 and 30:1 expansion ratio foams). Scaling laws were developed to relate the foam depth, foam density, and charge mass to noise reductions. These laws provide consistent results for reductions in the peak level, FSEL and CSEL up to a dimensionless foam depth of 2.5. A two part model for the mechanisms of sound level reductions by foam is suggested.
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