The G.R.A.S. IEC 711 RA0045 Ear Simulator is an ear simulator with an input impedance closely resembling that of an average human ear. The RA0045 includes a 40AG pressure microphone and each RA0045 is individually calibrated with this specific microphone. The RA0045 meets the requirements of IEC 60711:1981 Occluded-ear simulator for the measurement of earphones coupled to the ear by ear inserts.
The G.R.A.S. IEC 711 RA0045 Ear Simulator is an ear simulator with an input impedance closely resembling that of an average human ear. The RA0045 includes a 40AG pressure microphone and each RA0045 is individually calibrated with this specific microphone.