DIN EN 16272-6-2014 轨道交通. 轨道. 作用于空气传声的隔音屏障及相关设备. 测定声学性能的试验方法. 第6部分: 内在特性. 直接声场条件下隔绝空气声的原位值; 德文版本EN 16272-6-2014
Railway applications - Track - Noise barriers and related devices acting on airborne sound propagation - Test method for determining the acoustic performance - Part 6: Intrinsic characteristics - In situ values of airborne sound insulation under direct so