Acoustics. Measurement of sound insulation in buildings and of building elements. Part 9: Laboratory measurement of room-to-room airborne sound insulation of a suspended ceiling with a plenum above it (ISO 140-9:1985)
NORM herausgegeben am 1.5.1995
Designation standards: ČSN EN 20140-9
Classification mark: 730511
Catalog number: 17498
Note: UNGÜLTIG
Publication date standards: 1.5.1995
The number of pages: 12
Approximate weight : 36 g (0.08 lbs)
Country: Czech technical standard
Kategorie: Technische Normen ČSN