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.

Contains up to 3 historical editions and related amendments

AS 1276-1979

Methods for determination of sound transmission class and noise isolation class of building partitions