BS EN 1793-2:2018(2022) Road traffic noise reducing devices — Test method for determining the acoustic performance Intrinsic characteristics of airborne sound insulation under diffuse sound field conditions
2018BS EN 1793-2:2018 Road traffic noise reducing devices. Test method for determining the acoustic performance. Intrinsic characteristics of airborne sound insulation under diffuse sound field conditions
2012BS EN 1793-2:2012 Road traffic noise reducing devices. Test method for determining the acoustic performance. Intrinsic characteristics of airborne sound insulation under diffuse sound field conditions