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GTD Analysis of Scattering by Two Elastic Spheres

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Sound scattering by a system of two immersed identical elastic spheres insonified by an incident plane wave is studied. The pressure in the backscattered wave is obtained against the direction of the incident wave by using Geometrical Theory of Diffraction (GTD). Three surface waves play a significant role in the scattering: the Stoneley wave, the Rayleigh wave and one particular Brekhovskikh wave. The study is done for various distances d between the two spheres and for various values of the reduced frequency ka of the incident wave. Moreover, all the interactions between the two spheres are considered and compared: it is shown that, depending on the region considered, either the geometrical interaction or the Stoneley wave interaction provides the main contribution.
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Document Type: Research Article

Publication date: 1997-01-01

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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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