Road traffic noise reducing devices - Test method for determining the acoustic performance - Part 3: Normalised traffic noise spectrum; German version EN 1793-3:1997
国外标准现行
标准号:DIN EN 1793-3-1997
标准名称: 道路交通降噪设备.测定声音特性的试验方法.第3部分:标准交通噪音频谱
英文名称:Road traffic noise reducing devices - Test method for determining the acoustic performance - Part 3: Normalised traffic noise spectrum; German version EN 1793-3:1997