ISO 140-9:1985
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
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Acoustics Measurements 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
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
03-04-2019
English, French
14-02-1985
Specifies a method for measuring a quantity called the suspended ceiling normalized level difference when the sound transmitted by paths other than the required paths is negligible.
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