2004ISO 140-1:1997/Amd 1:2004 Acoustics - Measurement of sound insulation in buildings and of building elements - Part 1: Requirements for laboratory test facilities with suppressed flanking transmission; Amendment 1: Specific requirements on the frame of the test opening for lightwei
1997ISO 140-1:1997 Acoustics - Measurement of sound insulation in buildings and of building elements - Part 1: Requirements for laboratory test facilities with suppressed flanking transmission
1990ISO 140-1:1990 Acoustics; measurement of sound insulation in buildings and of building elements; part 1: requirements for laboratories
1978ISO 140-1:1978 Acoustics — Measurement of sound insulation in buildings and of building elements — Part 1: Requirements for laboratories