GRAS 43AD Ear Simulator Kit According to ITU-T Rec. P57 Type 1

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 GR0336
• Mounting plates for circum-aural and supra-aural headphones

A prepolarized version is available, GRAS 43AD-S1.