ANSI S1.12 : 67(R1997)
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
LABORATORY STANDARD MICROPHONES, SPECIFICATIONS FOR,
31-08-2001
12-01-2013
Covers types of laboratory microphones that are suitable for calibration by an absolute method such as the reciprocity technique. Intended for use as acoustical measurement standards either in free-field or in conjunction with a variety of devices such as artificial voices and coupler for calibrating earphones or microphones.
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