Noise control in ducts by means of wall periodicity

Muhammad A. Hawwa*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A circular cylindrical duct is designed to have a geometric periodicity at its wall. The duct functions as an acoustic filter capable of blocking a certain mode from transmitting over certain frequency stop bands. By slightly altering the wall periodicity, favorable widening of the stop band is achieved. The acoustic wave interaction with the periodic duct is analytically modelled by means of a perturbation scheme. The filtering performance of the duct is evaluated by solving coupled mode equations to find reflection coefficient spectra.

Original languageEnglish
Title of host publicationCollection of Technical Papers - 10th AIAA/CEAS Aeroacoustics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
Pages2672-2684
Number of pages13
ISBN (Print)1563477130, 9781563477133
DOIs
StatePublished - 2004

Publication series

NameCollection of Technical Papers - 10th AIAA/CEAS Aeroacoustics Conference
Volume3

ASJC Scopus subject areas

  • General Engineering

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