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Noise Propagation around a Thin Half-Plane

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The detailed behavior of Macdonald's rigorous solution for a spherical sound diffraction by a half-plane are clarified by numerical calculation, and it is shown that all experimental results are in a very good agreement with the rigorous solution no matter where a sound source and an observation point are located, and that the approximate formula of the rigorous solution given accurately by Bowman and Senior has little approximation error.

Further a new simple approximate formula of the rigorous solution is presented and a practical method based on the new approximate formula is proposed for the prediction of the propagation of noise, by which the detailed peak-dip due to interference between several waves are not drawn in the sound pressure level distributions but only monotonous gradual variations are drawn.
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Document Type: Research Article

Publication date: November 1, 1977

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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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