Road traffic noise reducing devices - Test method for determining the acoustic performance - Part 1: Intrinsic characteristics of sound absorption; German version EN 1793-1:1997— 6 стр.
Acoustics - Measurement of sound absorption in a reverberation room; Amendment A1: Test specimen mountings for sound absorption tests (ISO 354:1985/AMD 1:1997); German version EN 20354/A1:1997— 4 стр.
Road traffic noise reducing devices - Test method for determining the acoustic performance - Part 1: Intrinsic characteristics of sound absorption; German version EN 1793-1:2012— 12 стр.
Road traffic noise reducing devices - Non-acoustic performance - Part 2: General safety and environmental requirements; German version EN 1794-2:1998— 10 стр.
Road traffic noise reducing devices - Test method for determining the acoustic performance - Part 1: Intrinsic characteristics of sound absorption; German version EN 1793-1:2012— 12 стр.
