@inproceedings{8b8419b399e64b27a1b08ae2db8cf63c,
title = "Noise control in ducts by means of wall periodicity",
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.",
author = "Hawwa, \{Muhammad A.\}",
year = "2004",
doi = "10.2514/6.2004-3035",
language = "English",
isbn = "1563477130",
series = "Collection of Technical Papers - 10th AIAA/CEAS Aeroacoustics Conference",
publisher = "American Institute of Aeronautics and Astronautics Inc.",
pages = "2672--2684",
booktitle = "Collection of Technical Papers - 10th AIAA/CEAS Aeroacoustics Conference",
}