IEC 60651:1979
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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09-03-2020
01-01-1979
Deals with sound level meters of four degrees of precision, designated Types 0, 1, 2 and 3. Specifies the following characteristics: directional characteristics, frequency weighting characteristics, time-weighting, detector and indicator characteristics, sensitivity to various environments. Establishes electrical and acoustical tests to verify compliance with characteristics specified and describes the method for absolute sensitivity calibration. This standard supersedes IEC 60123 and IEC 60179.
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