Traffic noise barriers are one of the most important ways of environmental noise pollution control. Profiled barriers are one of the most successful noise control screens. A simple mathematical model representation of the zones behind rigid and absorbent barriers with the highest insertion loss using the destructive effect of the indirect path via barrier image is introduced. The results are compared with the results of a verified two-dimensional (2D) BEM in a wide field behind those barriers. Field measurements for the model near a highway in a megacity were also tested. A very good agreement between the results has been achieved. In this method, effective height is used for any different profile barrier. Since the highway dominant noise frequency was found to be at 125 Hz 1/3-octave band center frequency, the presented model in this study showed that the best place for installing a T-shaped barrier is 10.5m from the target receiver. The introduced model is very simple and fast and could be used for choosing the best location of profiled barriers to achieve the highest performance with no additional cost.

中文翻译：

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使用数学模型确定具有最高性能的噪声屏障后面的最佳区域

交通隔音屏障是环境噪声污染控制的重要手段之一。异形屏障是最成功的噪音控制屏幕之一。介绍了使用通过屏障图像的间接路径的破坏性影响具有最高插入损耗的刚性和吸收屏障后面区域的简单数学模型表示。将结果与在这些障碍后面的广阔领域中经过验证的二维 (2D) BEM 的结果进行比较。还测试了大城市高速公路附近模型的现场测量。结果之间取得了非常好的一致性。在此方法中，有效高度可用于任何不同的剖面屏障。由于高速公路的主要噪声频率被发现为 125 Hz 1/3 倍频程频带中心频率，m 来自目标接收器。引入的模型非常简单和快速，可用于选择异形屏障的最佳位置，以实现最高性能，无需额外成本。