居住小区交通噪声概率分布特征及其评价

Probabilistic Distribution of Road Traffic Noise in Housing Estate and Its Significance in Traffic Noise Assessment

在连续35天监测的基础上,分析了道路交通流量的概率分布特征,发现道路交通流量在时间上呈对数正态分布。该分布导致小区交通噪声在时间上具有明显的正态分布特征,其中小区临街交通噪声在空间上也呈正态分布。将上述概率分布特征应用到小区道路交通噪声评价中,使得评价结果不仅具有一般的大小意义,还具有概率分布意义。

Probabilistic distribution of traffic flow was analyzed based on 35 days monitoring. Road traffic flow showed logarithmic normal distribution, which resulted in normal distribution of traffic noise in housing estate. Noise level at sites located beside roadways showed normal distribution in space too. These probabilistic distribution characteristics were applied in traffic noise assessment of housing estate. Both mean value and distribution were given in assessment result.