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ASA/ANSI S1.4-2014/Part 2/IEC 61672-2-2013 (R2024)
Electroacoustics - Sound Level Meters - Part 2: Pattern Evaluation Tests
ANSI/ASA S1.4-2014/Part 2 / IEC 61672-2:2013 provides details of the tests necessary to verify conformance to all mandatory specifications given in ANSI/ASA S1.4-2014/Part 1 / IEC 61672-1:2013 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. This edition constitutes a technical revision; the main technical changes with regard to the previous edition concern conformance to specifications which is now demonstrated when measured deviations from design goals do not exceed the applicable acceptance limits, and when the uncertainty of measurement does not exceed the corresponding maximum permitted uncertainty, with both uncertainties determined for a coverage probability of 95 %. In this document, references to IEC 61672-1, IEC 61672-2, and IEC 61672-3 refer to the second editions of the IEC standards unless stated otherwise. They refer equally to the ANSI/ASA S1.4-2014 / IEC 61672:2013 editions. Procedures for the pattern-evaluation testing of sound level meters designed to conform to the specifications of IEC 61672-1:2002 were given in IEC 61672-2:2003.
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Acoustical Society of America [asa]
