GRAS RA0039 Ear Simulator according to IEC 60318-1

Volume: Complex
ANSI: S3.7
IEC: 60318-1

The GRAS IEC 318 RA0039 Ear Simulator is an ear simulator with an input impedance closely resembling that of an average human ear. When the RA0039 is coupled to a sound source, the impedance will load the sound source similar to the loading caused by the human ear. The RA0039 meets the requirements of IEC 60318-1:1998 Electroacoustics - "Simulators of human head and ear - Part 1: Ear simulator for the calibration of supra-aural earphones".


The RA0039 is measured and calibrated according to the ITU-T Recommendation P.57 (08/96) ”Series P: Telephone transmission quality, Objective measuring apparatus: Artificial ears”.

The RA0039 is also part of the GRAS 43AA Artificial Ear and GRAS 43AD Artificial Ear.


0 V / CCP
Humidity range non condensing
% RH
0 to 95
ANSI standard
IEC standard
60318-1 (former 60318)
ITU-T recommondations
CE/RoHS compliant/WEEE registered
Yes/Yes, Yes
g / oz
155 / 5.47

Acoustic input impedance of the RA0039

GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.