Simplified calculation method for noise reduction by barriers on the ground

概要

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This paper introduces a calculation method which evaluates noise reduction caused by barriers considering various ground effects. It is necessary to take the problem of sound diffraction and sound propagation over the ground surface into account in order to obtain the solution of noise reduction by barriers installed on the ground. Our proposing method, in view of practical use, indicates that noise attenuation by diffracted wave and that of ground-reflected wave (including ground wave) are calculable independently, hence the total noise attenuation by barriers on the ground should be presented with a simple numerical expression. Good agreements are found between calculations and model experiments as well as field experiments.
社団法人日本音響学会の論文