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About This Item


Full Description

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.

Document History

  1. 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

    • Most Recent
  2. AS 2499-1981

    Acoustics - Method for laboratory measurement of airborne sound attenuation of ceilings (two-room method)

    • Historical Version