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An experimental examination of acoustic echo structure

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The structure of the echoes from various solid bodies immersed in water is examined experimentally. The echo envelopes are compared with the theoretical forecasts of two earlier papers which respectively described and gave examples of the mechanism of echo formation applicable when short-wavelength, acoustic irradiation is incident upon a rigid body immersed in a fluid medium. The theory predicted that echoes are made up of discrete components associated with discontinuities in a certain function of the projection of the scattering body towards the transducers; it also forecast several types of behaviour of echo envelopes which depend on the degree of overlap of these echo components. The experimental results are in good qualitative agreement with the theory, while the small amount of quantitative evidence available tends, in the main, to give it support. In the cases where the experimental results do not agree with theoretical predictions, there are strong indications that this is due to departure from the postulate of an impenetrable scattering body.
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Document Type: Research Article

Publication date: January 1, 1964

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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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