DIN CEN/TS 16272-5 Railway applications - Track - Noise barriers and related devices acting on airborne sound propagation - Test method for determining the acoustic performance - Part 5: Intrinsic characteristics - In situ values of sound reflection under direct sound field conditions; German version CEN/TS 16272-5:20

standard by Deutsches Institut Fur Normung E.V. (German National Standard), 09/01/2014