Describes an acoustic coupler for loading supra-aural audiometric earphones as specified in ISO 389 with a specified acoustic impedance, when calibrating audiometers, in the frequency range of 125 Hz to 8 000 Hz.
IEC 60318-3 Ed. 1.0 b:1998 History
IEC 60318-3 Ed. 2.0 b:2014
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IEC 60318-3 Ed. 1.0 b:1998
$21.00 $43.00
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