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Scattering by Spherical and Cylindrical Fluid Acoustic Eaton Lenses

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Cylindrical and spherical fluid Eaton lenses have been analyzed by wave optics for the particular case of monochromatic plane incident radiation.

The farfield scattered radiation patterns indicate a nearly even splitting of scattered energy between forward and backscatter corresponding to shadow forming and reflected radiation respectively. The total scattering cross sections for ϱ-c boundary matched Eaton lenses approach, in an oscillatory manner, a value equal to approximately twice the projected area. Thus at high frequencies the Eaton lenses behave as plane mirrors at normal incidence. The cylindrical Eaton lens forms a more or less definite shadow at moderate frequencies while the shadow for the corresponding spherical lens contains a pronounced Fresnel bright spot.
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Document Type: Research Article

Publication date: 01 April 1971

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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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