Historical
AS 1276-1979
Methods for determination of sound transmission class and noise isolation class of building partitions (FOREIGN STANDARD)
Describes methods for determining four indices for rating the properties of partitions, including walls and floor-ceiling assemblies, used to divide spaces in domestic and commercial buildings in reducing the transmission of airborne sound; the four indices are sound transmission class, field sound transmission class, noise isolation class, and normalized noise isolation class.
Standards Australia [sai]