DIN EN 1793-5-2016 道路交通噪声降低设备.测定声学性能的试验方法.第5部分:内在特性.直接声场条件下声反射的原位值.德文版本EN 1793-5:2016
Road traffic noise reducing devices - Test method for determining the acoustic performance - Part 5: Intrinsic characteristics - In situ values of sound reflection under direct sound field conditions; German version EN 1793-5:2016