SANS 140-2-1991 声学．建筑物和建筑构件隔音性能测量．第2部分：数据精密度的确定，验证和应用
Acoustics - Measurement of sound insulation in buildings and of building elements Part 2: Determination, verification and application of precision data
Specifies procedures for assessing the uncertainty in the acoustical measurements described in ISO 140-3 (published in South Africa as an identical adoption under the designation SANS 140-3) to ISO 140-9 due to random and systematic influences.