随着社会主义建设事业的发展,北京市机动车辆的数量逐年增加,这就使城市中行驶车。辆产生的交通噪声急剧增长,严重地影响了职工和市民的学习、工作及休息。北京市环境保护办公室从1974年开始着手制定北京市机动车辆噪声允许标准。从调查与分析情况表明,目前北京市交通噪声主要成因是单个车辆噪声,而不在于车流量,这主要是 With the development of socialist construction, the number of motor vehicles in Beijing has been increasing year by year, which makes the vehicles in the cities. The rapid traffic noise generated by vehicles has seriously affected the learning, working and rest of workers and citizens. Beijing Environmental Protection Office started in 1974 to develop Beijing motor vehicle noise allowable standard. From the survey and analysis shows that the main cause of traffic noise in Beijing is a single vehicle noise, not the traffic flow, which is mainly