DIN EN 1793-1-2017 道路交通减噪设备.测定声学性能的试验方法.第1部分:扩散声场条件下吸音作用的本质特征;德文版本EN 1793-1-2017
Road traffic noise reducing devices - Test method for determining the acoustic performance - Part 1: Intrinsic characteristics of sound absorption under diffuse sound field conditions; German version EN 1793-1:2017