BS EN 16272-2-2012 轨道交通.轨道. 对空气传声起作用的隔声板和相关设备. 测定声学性能的试验方法. 内在特性. 扩散声场条件下实验室中的空气隔声
Railway applications. Track. Noise barriers and related devices acting on airborne sound propagation. Test method for determining the acoustic performance. Intrinsic characteristics. Airborne sound insulation in the laboratory under diffuse sound field co