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About This Item


Full Description

Describes the method for the measurement of the airborne sound attenuation by ceilings between two rooms with plenum space above. This method provides a means of evaluation of the sound isolating performance of a ceiling system under laboratory conditions.

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