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11 - Radiated Sound Pressure Prediction

Published online by Cambridge University Press:  11 May 2021

Erkan Dokumacı
Erkan Dokumacı
Affiliation:
Dokuz Eylül University
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Summary

Chapter 11 describes calculation of the sound pressure level at a point in the acoustic field of an in-duct source. Insertion loss of a silencer is shown to be represented approximately by source-independent parameters under certain conditions. The discussion encompasses multi-modal sound propagation and radiation and the ASHRAE method of silencer sizing in ventilation and air distribution systems.

Keywords

sound pressure levelorder analysisinsertion lossnoise reductionattenuationtransmission losspower sourceASHRAE method
Type
Chapter
Information
Duct Acoustics
Fundamentals and Applications to Mufflers and Silencers
 , pp. 474 - 500
Publisher: Cambridge University Press
Print publication year: 2021

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References

Joseph, P., Morfey, C.L. and Lowis, C.R., Multi-mode sound transmission in duct with flow, J. Sound. Vib. 264 (2003) 523–544.CrossRefGoogle Scholar
Rice, E.J., Modal density function and the number of propagating modes in ducts, NASA TM X-73539, (1976).CrossRefGoogle Scholar
ASHRAE, Application Handbook, Chapter 46: Sound and vibration control, (Atlanta GA: American Society of Heating, Refrigerating and Air Conditioning Engineers Inc., 1999).Google Scholar

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