Acoustics. Measurement of sound insulation in buildings and of building elements. Part 9: Laboratory measurements of room-to-room airborne sound insulation of a suspended ceiling with a plenum above it (ISO 140-9:1985)
NORM herausgegeben am 1.9.1998
Designation standards: STN EN 20140-9
Classification mark: 730511
Catalog number: 72624
Note: UNGÜLTIG
Publication date standards: 1.9.1998
Approximate weight : 30 g (0.07 lbs)
Country: Slovak technical standard
Kategorie: Technische Normen STN