Technology
- The GRAS 43AD is a complete assembly for acoustical measurements on acoustical transmitters and loudspeakers in accordance with:
- IEC 60318-1 & -2 Electroacoustics – Simulators of human head and ear – Part 1: Ear simulator for the calibration of supra-aural earphones, 1998-07
- ITU-T Recommendation P.57 (08/96) Series P: Telephone transmission quality, Objective measuring apparatus: Artificial ears.
- It can be integrated with a telephone test head or permanently installed on a production test line.
- The 43AD comprises:
- IEC 318 GRAS RA0039 Ear Simulator
- GRAS 40AG ½” Pressure Microphone
- GRAS 26AK ¼” Preamplifier
- Snap coupling GR0332 and RA0523
- Mounting plates for circum-aural and supra-aural headphones
- A prepolarized version is available, GRAS 43AD-S1.