NF EN 61094-4 : 1996

Applies to working standard microphones. Gives mechanical dimensions and certain electroacoustic characteristics for working standard microphones for measuring systems used to determine sound pressure to enable the microphones to be used as transfer standards in the calibration of acoustic measurement instruments. Describes a system for classifying working standard microphones into a number of types according to their dimensions and properties so as to facilitate the specification of measurement systems, the calibration of measurement systems and microphones by sound calibrators, and the interchangeability of microphones in given measuring and calibration systems.