The G.R.A.S. 43AA Artificial Ear is a complete test jig for acoustical measurements on telephone handsets and earphones. It includes an IEC 318 Ear Simulator RA0039 which is individually calibrated according to the ITU-T Recommendation P.57 (08/96) ”Series P: Telephone transmission quality, objective measuring apparatus: artificial ears.
The Type 43AA comprises:
IEC 318 G.R.A.S. RA0039 Ear Simulator
G.R.A.S. 40AG ½" Pressure Microphone
G.R.A.S. 26AC ¼" Preamplifier
G.R.A.S. RA0052 Test Jig
Mounting plates for circum-aural and supra-aural headphones