scope:

This Recommendation describes the calibration of one-inch condenser microphones used as laboratory standards. It is reciprocity restricted to pressure calibration by the coupler method. The object of this Recommendation is to specify methods of measuring certain characteristics of standard condenser microphones with the highest obtainable accuracy so that exchanges between testing authorities may be based on clearly expressed and reproducible results. Although the pressure calibration of condenser microphones is a problem of general nature, this Recommendation is restricted to microphones commonly known as one-inch condenser microphones.