SANS 61094-3:2009 Measurement microphones Part 3: Primary method for free-field calibration of laboratory standard microphones by the reciprocity technique
Specifies a primary method of determining the free-field sensitivity so as to establish a reproducible and accurate basis for the measurement of sound pressure under free-field conditions.
SANS 61094-3:2009 history
2009SANS 61094-3:2009 Measurement microphones Part 3: Primary method for free-field calibration of laboratory standard microphones by the reciprocity technique