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The paper presents principles which can be used in reference numerical models to make easy calculations for predicting long-range outdoor sound propagation under complex environment. Limits, assumptions as well as approximations used are discussed here in terms of accuracy for typical road traffic configurations, depending on range of frequency, geometry of the site and atmospheric conditions. Part of this work has been achieved during the European Project Harmonoise.
Alexis Berne, Etienne Gabriel Henri Vignon
Alain Nussbaumer, Scott Walbridge, Matthew James Sjaarda