IEC 60942 Revised
IEC 60942:1988
Sound calibrators
Specifies the performance requirements for three classes of sound calibrator. Sound calibrators are designed to produce a known effective sound pressure level or levels at a specified frequency or frequencies when coupled to specified models of microphone or specified configurations.
CHFÂ 40.-
A more recent version of this publication exists:
IEC 60942:2017 RLV