ISO 140-2:1991, Acoustics -- Measurement of sound insulation in buildings and of building elements -- Part 2: Determination, verification and application of precision data

This part of ISO 140 specifies procedures for assessing the uncertainty in the acoustical measurements described in ISO 140-3 to ISO 140-9 due to random and systematic influences.It gives guidelines fordetermination of the repeatability value r and the reproducibility value R; verification of repeatability values r and reproducibility values R for different measurement arrangements in one laboratory and for comparisons between different laboratories; application of repeatability values r and reproducibility values R in practice. Tentative repeatability values and reproducibility values of the test methods according to ISO 140-3, ISO 140-4 and ISO 140-6 to ISO 140-8 are given in annex A. This title may contain less than 24 pages of technical content.