A new trial to estimate the noise propagation characteristics of a traffic noise system

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概要

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• Generally speaking, a level fluctuation of road traffic noise is brought on by various causes. It is obvious that the ultimate causes are due to same effect of the noise propagation characteristics affected by reflections and/or absorptions owing to surrounding buildings and their topographical locations. By dividing the road into a suitable number of blocks, and paying close attention to the mean value of noise intensity in each block, the mean value can be proportional to the number of cars in the of cars in the block. In this paper, on the basis of the additive property of sound energy, the unified method has been proposed to estimate the inherent characteristics of noise propagation in each block in the form of a synthetical evaluation with the number of cars for each cat-type, also considering the entire background noise. We have confirmed the validity of out theoretical results, not only by meas of digital simulation, but also by road traffic noise data experimentally observed near Hiroshima City. The experimental results clearly show a good agreement with the values recently reported by other official groups.

• 社団法人日本音響学会の論文

著者

• Iwashige Hirofumi

  Faculty Of Engineering Hiroshima University

• Ohta Mitsuo

  Faculty of Engineering,Hiroshima University

• Hatakeyama Kazutatsu

  Faculty of Engineering,Hiroshima University

• Okita Tsuyoshi

  Faculty of Engneering,Yamaguchi University

• Okita Tsuyoshi

  Faculty Of Engneering Yamaguchi University

• Hatakeyama Kazutatsu

  Faculty Of Engineering Hiroshima University

• Ohta Mitsuo

  Faculty Of Engineering Kinki University

• Ohta Mitsuo

  Faculty Of Engineering Hiroshima University

• Ohta Mitsuo

  Faculty of Eng.,Kinki Univ.Umenobe 1,Takaya,Higashi-Hiroshima,729-2116 Japan

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