Typical users are
Calibration of supra- and circum-aural and insert earphones
Free-field calibration and audiometric booth verification
Modular artificial ear systems according to standards
Dedicated audiometer calibration analyzer
The G.R.A.S. 90AA Audiometer Calibration System is configured to meet the requirements of modern audio-meter calibration. It is easy and fast to set up and control, and can be upgraded as your calibration needs change. Two standard packages are available and several options can be added, depending on the type and features of the audiometer and respective ear-phones connected.
The 90AA Audiometer Calibration System includes artificial ears for TDH-39/49 and HDA-200 and an audiometer calibration analyser.