指数分布モデルにおける L_α

概要

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A simple approximate expression for L_α of road traffic noise is explicitly formulated on the basis of the analogous relation between an exponentially distributed vehicles model and a one point source model. A one point source model assumes that only a point source is put on a lane in such a way that the situation of the source is determined statistically. An equivalent one point source model is constructed by comparing the means, variances and the probability density functions of sound intensity observed in both models. The value of L_α in the one point source model may be regarded as an approximate value of L_α in the corresponding exponentially distributed vehicles model. This method of approximation is applied to the prediction of L_α in more realistic traffic flow models. The values of L_α calculated from the derived equations and those from simulated calculation proved to be in good agreement.
社団法人日本音響学会の論文
1982-08-01