Bowlby W, Cohn L F
J Acoust Soc Am. 1986 Sep;80(3):855-68. doi: 10.1121/1.393909.
An algorithm is developed and validated for the prediction of the reduction, or degradation, of traffic noise barrier insertion loss when a second barrier is placed on the opposite side of the highway. The algorithm combines the basic emission, propagation, and barrier attenuation features of the Federal Highway Administration traffic noise prediction model with a geometrical acoustics approach for multiple reflections. The resultant model can accommodate any number of source lanes or receivers, three vehicle categories, and independently variable barrier heights and absorption coefficients. The model was validated against mathematical, scale model, and full scale field data received from other researchers, and has proved to be a good predictor of insertion loss degradation.
开发并验证了一种算法，用于预测当在高速公路另一侧设置第二个屏障时，交通噪声屏障插入损失的降低或衰减情况。该算法将联邦公路管理局交通噪声预测模型的基本发射、传播和屏障衰减特征与用于多次反射的几何声学方法相结合。所得模型可以容纳任意数量的源车道或接收器、三类车辆以及独立可变的屏障高度和吸收系数。该模型针对从其他研究人员处获得的数学、比例模型和全尺寸现场数据进行了验证，并且已被证明是插入损失衰减的良好预测器。
