一、概述 环境噪声来源于许多方面,但对城市环境影响最大,涉及面最广的,就是各种机动车辆行驶时产生的交通噪声了。交通噪声不同于其也类型噪声,它时刻都处在变化中,瞬时起伏大。它影响人们的睡眠和休息,降低工作与学习效率。 机动车正常行驶情况下,交通噪声的大小与车种、车流量和行驶速度有关;也与道路结构,停车、启动有关;喇叭声也有很大的影响。其中车种、车流量和车速是决定交通噪声大小的基本因素。 随着现代城市建设的发展,交通噪声的污染变得愈加严重。降 I. Overview Environmental noise comes from many aspects, but it has the greatest impact on the urban environment. The most extensive area covered is the traffic noise generated by various motor vehicles. Traffic noise is different from its type noise, it is always changing, instantaneous ups and downs. It affects people’s sleep and rest, reducing work and learning efficiency. Under the normal driving conditions of motor vehicles, the traffic noise is related to the type of vehicles, traffic volume and driving speed; it is also related to road structure, parking and start-up; the horn sound also has a great influence. Among them, vehicle type, traffic volume and speed are the basic factors that determine traffic noise. With the development of modern urban construction, traffic noise pollution has become more serious. drop