ISO 12999-2:2020
Current
The latest, up-to-date edition.
Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users
English, French
22-06-2020
This document specifies how to calculate:
the uncertainty of sound absorption coefficients and equivalent sound absorption areas measured according to ISO 354;
the uncertainty of the practical and weighted sound absorption coefficients determined according to ISO 11654;
the uncertainty of the object sound absorption coefficient according to ISO 20189; and
the uncertainty of the single number rating determined according to EN 17931.
Furthermore, the use of uncertainties in reporting measured or weighted sound absorption coefficients is explained.
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