SN-CEN/TS 1793-5:2003
道路交通噪声降低装置 声学性能测定试验方法 第5部分:固有特性 声反射和空气声隔声的现场值
Road traffic noise reducing devices — Test method for determining the acoustic performance — Part 5: Intrinsic characteristics — In situ values of sound reflection and airborne sound insulation