高架复合道路交通噪声的声屏障A计权声插入损失的计算

对解决高架复合道路声屏障的声插入值损失的计算问题，本文阐述了高架复合道路在不同位置设立的声屏障，在车辆类型不同，车速不同及车流量不同的条件下对交通噪声Ａ计权声插入损失的计算方法，理论模型的计算结果与实测值基本相符，误差在１．５ｄＢ（Ａ）以内，该模型在车流量较低的夜间，对衡量设立声屏的高架复合道路噪声及其对环境的影响程度有重要实际意义。

Computation of the A-Weighted Insertion Loss for Sound Barriers Used in Traffic Noise Control of Elevated Complex Road

n order to solve the problem of computing the insertion lOSS of sound banters used on elevated complex roads,this paper presented the computation method of the Aweighted insertion lOSS of sound barriers installed at different PO8itions for different types of vehicles, different speeds, and different vehicle flows.It was found that the computational results are generally in agreement with measurements,the error is less than 1.5 dB(A).This model is of practical significance for the estimation of traffic noise of elevated complex roads with sound barriers,especially at night when traffic flow is relatively low.