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Description / Abstract:
In this standard, methods are described for performing absolute and
comparison calibrations of
laboratory standard microphones specified in American Standard
Specification for Laboratory
Standard Pressure Microphones, Z24.8-1949. Absolute calibration is
based upon the reciprocity
principle. Techniques for performing pressure (coupler), free-field,
and random-field calibrations
are described, including experimental procedures. The free-field and
random-field calibration
techniques may also be used for calibrating microphones not described
in American Standard
Z24.8-1949.