BS EN 20140-9:1994被替代
Acoustics. Measurement of sound insulation in buildings and of building elements. Laboratory measurement of room-to-room airborne sound insulation of a suspended ceiling with a plenum above it
出版：British Standards Institution
專家解讀視頻
A method using a plenum of defined height mounted above an acoustical barrier which separates two rooms of a specified test facility.
? British Standards Institution 2013
Amendment notes:
AMD 7954 published 15 February 1994
Document identifier notes:
Also numbered BS 2750-9:1987.
SS EN 20140-9 Ed. 1 (1994) - Identical
ISO 140-9:1985 - Identical
UNE EN 20140-9:1995 - Identical
NF EN 20140-9:1994 - Identical
I.S. EN 20140-9:1994 - Identical
UNI EN 20140-9:1998 - Identical
NBN EN 20140-9:1995 - Identical
DIN EN 20140-9 (1993-12) - Identical
ONORM EN 20140-9:1993 - Identical
SN EN 20140-9:1993 - Identical
