This part of IEC61672 provides details of the tests necessary to verify conformance to all mandatory specifications given in IEC61672‑1 for time-weighting sound level meters, integrating-averaging sound level meters, and integrating sound level meters. Pattern-evaluation tests apply for each channel of a multi-channel sound level meter, as necessary. Tests and test methods are applicable to class 1 and class 2 sound level meters. The aim is to ensure that all laboratories use consistent methods to perform pattern-evaluation tests.
NOTE1 In this document, references to IEC61672‑1, IEC61672‑2, and IEC61672‑3 refer to the second editions unless stated otherwise.
NOTE2 Procedures for the pattern-evaluation testing of sound level meters designed to conform to the specifications of IEC61672‑1:2002 were given in IEC61672‑2:2003.