Model Calculations With a Fast Field Programme and Comparison With Selected Procedures to Calculate Road Traffic Noise Propagation Under Defined Meteorological Conditions
National guidelines for calculating noise propagation are still in use though progress was made to develop a unified scheme for sound propagation outdoors by taking more physical parameters of the propagation path into account. Besides comprehensive models simpler and faster calculations are under development in order to be used as an engineering model. Widespread classical engineering models from different European countries are compared in this study with physical wave propagation from a defined line source representing traffic noise. The numerical model is based on a fast-field programme. This scheme allows for a very fast calculation of wave propagation in a layered medium including complex boundary conditions. Source properties are carefully adjusted for comparison and the respective meteorological conditions of national guidelines are taken into account. It turns out that the different guidelines are in good agreement with exact calculations up to distances about 1000 m. The so-called downwind condition gives an excellent estimate for the conditions most favourable for sound propagation. The fast numerical calculation scheme enables easy systematic variation of e.g. source properties, meteorological conditions and ground impedances for any sensitivity analysis.
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Document Type: Research Article
Publication date: September 1, 2009
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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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