Road traffic noise reducing devices - Procedures for assessing long term performance - Part 1: Acoustical characteristics; German version EN 14389-1:2007— 11 стр.
Classification of environmental conditions - Part 3: Classification of groups of environmental parameters and their severities; section 4: Stationary use at non-weatherprotected locations; Amendment A1 (IEC 60721-3-4:1995/A1:1996); German version EN 60721-3-4:1995/A1:1997— 6 стр.
Road traffic noise reducing devices - Test method for determining the acoustic performance - Part 5: Intrinsic characteristics - In situ values of sound reflection and airborne sound insulation
Road traffic noise reducing devices - Procedures for assessing long term performance - Part 1: Acoustical characteristics; German version EN 14389-1:2015— 16 стр.
Road traffic noise reducing devices - Procedures for assessing long term performance - Part 1: Acoustical characteristics; German version EN 14389-1:2015— 16 стр.
