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交通噪声是城市环境噪声的主要来源,在国内城市噪声源的构成中占35%左右,其声级值高于其它噪声源引起的声级值.为了降低城市交通噪声,有必要研究城市交通干线噪声的计算和预测方法.本文通过理论和实测数据的统计分析,推求了交通干线噪声的计算公式和预测噪声发展趋势公式,一、交通干线等效声级的理论计算公式等效声级的大小取决于三个因素:a)非机动车辆声源——人流,自行车流等:b)机动车辆——车辆幅射声功率,车速,车流量,呜号声功率,呜号时间分布等:c)街道结构——街道宽度,快慢道分隔情况,道路坡度,街道两旁建筑物高度等.
Traffic noise is the main source of urban environmental noise, accounting for about 35% of the noise sources in urban China, and its sound level value is higher than that caused by other noise sources. In order to reduce urban traffic noise, it is necessary to study urban traffic trunk Noise calculation and forecasting method.Through statistical analysis of the theoretical and measured data, we deduced the calculation formula of the traffic trunk line and the prediction formula of the development trend of the noise, the theoretical calculation formula of the equivalent sound level of the traffic trunk line The equivalent sound level size Depends on three factors: a) the source of non-motor vehicles - the flow of people, the flow of bicycles, etc. b) the motor vehicle - vehicle radiated sound power, speed, traffic volume, sound power, ) Street structure - street width, jungle lane separation, the road gradient, the height of the buildings along the street and so on.