On the Relation between Fluctuations of Road Traffic Volume and that of Sound Levels Caused by the Fluctuations

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  • 道路交通流における交通量の変動と騒音レベルの変動との関係について
  • ドウロ コウツウリュウ ニ オケル コウツウリョウ ノ ヘンドウ ト ソウオン

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Abstract

The probability density function and the transition probability density function of sound levels at the site near a road, are derived. These functions can be derived on the basis of the fact that the relation between the traffic volumes and the sound levels seems to be approximately linear in the case when the ratio of distance l between a observation point and a road to the vehicle spacing d, is in the region of 0. 46&ltl/d&lt1. 60. The transition matrix of frequencies with which the sound level L_2 dB will be observed just after L_1 dB is observed, is obtained from these functions, and the calculated values are in good agreement with the mesuared ones.

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