On the Dissipation of Acoustic Energy in a Thin, Infinite, Poroelastic Plate
The Helmholtz integral equation formulation is used to produce an exact solution for the sound field reflected from an infinite, thin, porous, elastic plate. The acoustic properties of the porous material of the plate are predicted using an effective fluid assumption. The effect of an air cavity behind the plate is considered. A parametric study is performed to predict the effect on the acoustic properties of variations of the physical parameters of the poroelastic plate. It is shown that thin, light, poroelastic plates can provide high values of the acoustic absorption even for low frequency sound. This effect can be exploited to design compact noise control systems with improved acoustic performance.
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Document Type: Research Article
Publication date: July 1, 2002
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- Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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