EN 1793-2:1997 Road Traffic Noise Reducing Devices - Test Method for Determining the Acoustic Performance - Part 2: Intrinsic Charateristics of Airborne Sound Insulation
2018EN 1793-2:2018 Road traffic noise reducing devices - Test method for determining the acoustic performance - Part 2: Intrinsic characteristics of airborne sound insulation under diffuse sound field conditions
2012EN 1793-2:2012 Road traffic noise reducing devices - Test method for determining the acoustic performance - Part 2: Intrinsic characteristics of airborne sound insulation under diffuse sound field conditions
1997EN 1793-2:1997 Road Traffic Noise Reducing Devices - Test Method for Determining the Acoustic Performance - Part 2: Intrinsic Charateristics of Airborne Sound Insulation