Road traffic noise reducing devices. Test method for determining the acoustic performance. Intrinsic characteristics of sound absorption under diffuse sound field conditions— 28 стр.
Road traffic noise reducing devices. Test method for determining the acoustic performance. Intrinsic characteristics of airborne sound insulation under diffuse sound field conditions— 18 стр.
Railway applications. Track. Noise barriers and related devices acting on airborne sound propagation. Procedures for assessing long term performance. Non-acoustic characteristics— 18 стр.