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An Engineering Model for Sound Pressure in Shadow Zones Based on Numerical Simulations

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A model is introduced to calculate the sound in meteorologically generated shadow zones. The method uses raytracing to determine the border of the shadow zone. An empirical formula was defined which uses the relative position of the receiver in respect to this border to calculate a spectral meteorological access attenuation. The model was derived from reference data using a simulation based on wave theory, where sound propagation was calculated applying the finite difference time domain (FDTD) method. In the proposed empirical model, the influence of refraction upon ground effect is not explicitly taken into account. Therefore, the behaviour of the ground effect was investigated using further numerical simulations.
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Document Type: Research Article

Publication date: 01 July 2005

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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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