1.1This specification describes the construction and installation of standard reference specimens for quality control of laboratory sound transmission loss measurements using Test Method E90.
1.2Laboratories may choose to construct and test all of the reference specimens described here or only a subset. Specific specimens may be required by a test method or an accrediting agency.
1.3The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
