BS EN 16272-1-2012 铁路应用设施.轨道.对空气传声起作用的隔音板和相关设备.声学性能测定用试验方法.本质特征.扩散声场条件下实验室内的吸音作用
Railway applications. Track. Noise barriers and related devices acting on airborne sound propagation. Test method for determining the acoustic performance. Intrinsic characteristics. Sound absorption in the laboratory under diffuse sound field conditions