Measurements of Ground Effect Under Downward Refracting Conditions
The effects of ground and downward refracting meteorological conditions on the propagation of white noise from two source heights to four receiver heights were measured on an airfield with a view to validating a statistical curved-ray model for noise under downward refracting conditions over flat ground. The measured data supported the model when sound was propagated over an asphalted airstrip, but the model did not work for sound propagated over grassland, perhaps as a result of destructive interference between direct and reflected waves. The method of calculating the ground effect in ISO standard 9613-2 is also evaluated on the basis of the measured data.
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Document Type: Short Communication
Publication date: 01 March 2008
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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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