scope:

This part of the standard 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 for: - determining of the repeatability value <(cursief>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.