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Higher order mode and multimode acoustic transmission through the walls of flat-oval ducts

✍ Scribed by I.-J. Chang; A. Cummings

Publisher: Elsevier Science
Year: 1986
Tongue: English
Weight: 411 KB
Volume: 108
Category: Article
ISSN: 0022-460X
DOI: 10.1016/s0022-460x(86)80319-4

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✦ Synopsis

The transmission of sound energy, in the form of internally propagated higher order modes, through the walls of "fiat-oval" air conditioning ducts is investigated by means of numerical solutions to the equations of motion for the duct walls and the acoustic wave equation governing sound propagation inside the duct. A multimode sound transmission model thus established is used to provide an explanation of discrepancies between theoretical and experimental results obtained in previous work. Both predicted and measured data are given and agreement between the two is tolerably good.

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