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