BS EN 1793-5:2016(2018) Road traffic noise reducing devices - Test method for determining the acoustic performance Part 5 : Intrinsic characteristics - In situ values of sound reflection under direct sound field conditions
2016BS EN 1793-5:2016 Road traffic noise reducing devices. Test method for determining the acoustic performance. Intrinsic characteristics. In situ values of sound reflection under direct sound field conditions
2003BS CEN/TS 1793-5:2003 Road traffic noise reducing devices - Test method for determining the acoustic performance - Intrinsic characteristics - In situ values of sound reflection and airborne sound insulation