BS EN 1793-6:2012 Road traffic noise reducing devices. Test method for determining the acoustic performance. Intrinsic characteristics. In situ values of airborne sound insulation under direct sound field conditions
2021BS EN 1793-6:2018+A1:2021 Road traffic noise reducing devices. Test method for determining the acoustic performance - Intrinsic characteristics. In situ values of airborne sound insulation under direct sound field conditions
2018BS EN 1793-6:2018 Road traffic noise reducing devices. Test method for determining the acoustic performance. Intrinsic characteristics. In situ values of airborne sound insulation under direct sound field conditions
2012BS EN 1793-6:2012 Road traffic noise reducing devices. Test method for determining the acoustic performance. Intrinsic characteristics. In situ values of airborne sound insulation under direct sound field conditions