Specifies a reference coupler for loading an earphone with specified acoustic impedance when calibrating audiometers for the frequency range 125 Hz to 8000 Hz.
Original price was: $73.66.$36.00Current price is: $36.00.
Specification for an acoustic coupler (IEC reference type) for calibration of earphones used in audiometry
BSI Group , 02/22/1971
Pages: 10
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