The coupler is recommended as a simple and ready means for the exchange of specifications on audiometers and for calibration of earphones used in audiometry, even though the sound pressure developed by an earphone is not, in general, the same in the coupler as in a person's ear. Has the status of a technical report.
WITHDRAWN
IEC TR 60303:1970 ED1
99.60
Withdrawal effective
Aug 7, 1998