Identification of the acoustic resonances of absorbing cylinders using phase gradient and Argand diagram methods
Identifieur interne : 001703 ( Main/Exploration ); précédent : 001702; suivant : 001704Identification of the acoustic resonances of absorbing cylinders using phase gradient and Argand diagram methods
Auteurs : Hervé Franklin [France] ; Jean-Marc Conoir [France] ; Jean-Louis Izbicki [France]Source :
- Wave Motion [ 0165-2125 ] ; 2001.
Abstract
The properties of the acoustic resonances of a submerged absorbing elastic cylinder are investigated with the help of a two-channel scattering resonance formalism. In the elastic channel, different transition terms describing the resonance properties are compared. The scattering phase and its derivative with respect to the frequency are also studied thoroughly. Approximate formulae, involving different resonance widths, are given for the transition terms, the phase and its derivative. Argand diagrams of the transition terms are provided, summarising the characteristic quantities of the absorption phenomenon, i.e. the absorption coefficient, the phase and the resonance widths.
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DOI: 10.1016/S0165-2125(01)00073-7
Affiliations:
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<front><div type="abstract" xml:lang="en">The properties of the acoustic resonances of a submerged absorbing elastic cylinder are investigated with the help of a two-channel scattering resonance formalism. In the elastic channel, different transition terms describing the resonance properties are compared. The scattering phase and its derivative with respect to the frequency are also studied thoroughly. Approximate formulae, involving different resonance widths, are given for the transition terms, the phase and its derivative. Argand diagrams of the transition terms are provided, summarising the characteristic quantities of the absorption phenomenon, i.e. the absorption coefficient, the phase and the resonance widths.</div>
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