DIN EN ISO 140-4:1998 Measurement of sound insulation in buildings and components Part 4: Measurement of airborne sound insulation between rooms in buildings
2014DIN EN ISO 16283-1:2014 Acoustics - Field measurement of sound insulation in buildings and of building elements - Part 1: Airborne sound insulation (ISO 16283-1:2014); German version EN ISO 16283-1:2014
1998DIN EN ISO 140-4:1998 Measurement of sound insulation in buildings and components Part 4: Measurement of airborne sound insulation between rooms in buildings