ISO 12999-2:2020

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 1793‑1.

Furthermore, the use of uncertainties in reporting measured or weighted sound absorption coefficients is explained.

This standard contributes to the following Sustainable Development Goals:

	Format	Language
std 1 58	PDF + ePub
std 2 58	Paper

A standard is reviewed every 5 years

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