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Attenuation of sound in lined ducts with and without air flow
Study in lined ducting with air flow at velocities of from 2000 to 5000 fpm, and under no-flow conditions; to simulate broad-band sound spectrum of air-conditioning equipment, random-noise generator was used as noise source coupled to 15 in. speaker through amplifier; attenuation characteristics with air flow; comparison of measured plane wave attenuation with various equations.
Attenuation of sound in lined ducts with and without air flow
Study in lined ducting with air flow at velocities of from 2000 to 5000 fpm, and under no-flow conditions; to simulate broad-band sound spectrum of air-conditioning equipment, random-noise generator was used as noise source coupled to 15 in. speaker through amplifier; attenuation characteristics with air flow; comparison of measured plane wave attenuation with various equations.
Attenuation of sound in lined ducts with and without air flow
ASHRAE J
Kerka, W.F. (author)
ASHRAE Journal ; 5
1963
8 pages
Article (Journal)
English
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