Provides a laboratory method of measurement the airborne sound insulation of a suspended ceiling with a plenum of defined height mounted above an acoustical barrier which separates two rooms of a specified test facility. This Standard has been adopted with national modifications and reproduced from ISO 140-9:1985.

Acoustics — Measurements of sound insulation in buildings and of buildings elements — Laboratory measurement of room-to-room airborne sound insulation of a suspended ceiling with a plenum above it

AS/NZS 2499:2000

Acoustics — Measurements of sound insulation in buildings and of buildings elements — Laboratory measurement of room-to-room airborne sound insulation of a suspended ceiling with a plenum above it

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