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The scattering cross section of a resonator in a multimode waveguide

The scattering cross section of a resonator in a multimode waveguide Abstract The scattering of sound by a single monopole-dipole resonator in a multimode pipe is investigated. The resonator has the form of a Helmholtz resonator connected through a small bar to the pipe wall. In fact, this resonator is a combination of a monopole resonator and a dipole one positioned at the same point. The scattered fields of these resonators are orthogonal to each other. The scattering cross sections of the monopole and dipole resonators in a multimode pipe are calculated. The scattering cross section of the monopole-dipole resonator is determined as the sum of the scattering cross sections of the monopole and the dipole resonators. The friction in a resonator (the monopole or dipole resonator) reduces its scattering cross section by a factor of (1 + β)2, where β is the ratio between the friction resistance and the radiation resistance of this resonator. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acoustical Physics Springer Journals

The scattering cross section of a resonator in a multimode waveguide

Lapin, A. D.
Acoustical Physics , Volume 57 (3): 4 – May 1, 2011
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References (2)

Publisher
Springer Journals
Copyright
2011 Pleiades Publishing, Ltd.
ISSN
1063-7710
eISSN
1562-6865
DOI
10.1134/s1063771011030110
Publisher site
See Article on Publisher Site

Abstract

Abstract The scattering of sound by a single monopole-dipole resonator in a multimode pipe is investigated. The resonator has the form of a Helmholtz resonator connected through a small bar to the pipe wall. In fact, this resonator is a combination of a monopole resonator and a dipole one positioned at the same point. The scattered fields of these resonators are orthogonal to each other. The scattering cross sections of the monopole and dipole resonators in a multimode pipe are calculated. The scattering cross section of the monopole-dipole resonator is determined as the sum of the scattering cross sections of the monopole and the dipole resonators. The friction in a resonator (the monopole or dipole resonator) reduces its scattering cross section by a factor of (1 + β)2, where β is the ratio between the friction resistance and the radiation resistance of this resonator.

Journal

Acoustical Physics – Springer Journals

Published: May 1, 2011

Keywords: Acoustics

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