The Study of Mathematical Model for Predicting Road Traffic Noise

Jong-San Tsay ； Jen-Jon Lo ； Yi-Sheng Lin

《淡江理工學刊》 6卷2期 (2003/06) Pp. 111-120

https://doi.org/10.6180/jase.2003.6.2.06

並列摘要

Deriving a mathematical model for A-weighted equivalent level produced by road traffic is presented. It is based on the supposition that the distribution of vehicles on the road is describable using a Poisson distribution and that vehicle sound emission is non directional (monopole). These conditions are affirmative if the traffic flow is lower than about 500 vehicles/h and vehicle speed is higher than 30 km/h. Equations are supplied for application of the model to one and two lane road. A series of measurements have been carried out on different roads to verify the model. The relationship between the calculated and measured data has been quantified using a linear regression with a resulting correlation coefficient of 0.97. An extension of the model is proposed to include situations when the vehicles move at a speed slower than about 30km/h. In such situations the noise emission of a single vehicle is supposed to be directional in line with the direction of motion (dipole). The differences between monopole and dipole models are also studied.

並列關鍵字

A-weighted Equivalent Level ； Poisson Distribution ； Background Noise Level ； Gaussian Position Distribution