DIN EN 1793-2:2023-08 道路交通降噪装置声学性能测定试验方法第2部分:扩散声场条件下空气隔声的固有特性
Road traffic noise reducing devices - Test method for determining the acoustic performance - Part 2: Intrinsic characteristics of airborne sound insulation under diffuse sound field conditions; German and English version prEN 1793-2:2023 / Note: Date o...