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The Reflections and Refractions of Acoustic Beams at Water Sediment Interfaces

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The interaction of acoustic beams with refracting interfaces is discussed in terms of the relation between the plane wave spectrum of the beam and the plane wave reflection coefficient. In particular, the behaviour of beams generated from conventional broadside apertures and those generated from a volume aperture (parametric array) are compared for interfaces which have a range of critical angles. In both cases, the form of the reflected and refracted beams is determined solely by the interaction of the plane wave spectrum and the reflection or transmission coefficient. For the parametric array considered, the extent and shape of the volume aperture and thus the plane wave spectrum is determined by truncation at the water sediment interface, an effect absent for conventional beams.
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Document Type: Research Article

Publication date: September 1, 1997

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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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