G.R.A.S. 90AB Basic Audiometer Calibration System

Freq range:
ANSI: S.1.40, S.1.43, S.1.11, S.3.6
IEC: 60318-1 & -2

The G.R.A.S. 90AB Basic Audiometer Calibration system is configured for the stationary calibration lab and will also calibrate supra- and circum-aural audiometric earphones like TDH-39 and HDA-200. This configuration includes a G.R.A.S. Audiometer Calibration Analyzer, two complete sets of standardized ear simulators and a coupler platform.

Frequency range (±1 dB) Hz TBD
Sound pressure level dB TBD
Power supply, external Vdc TBD
Input signal, max. Vrms TBD
AC output Vrms TBD
Actuator output Vdc TBD
Microphone polarization output Vdc TBD
AC output impedance TBD
Actuator output impedance TBD
Microphone polarization output impedance TBD
Gain dB TBD
ANSI standard S1.40, S1.43, S1.11, S3.6
IEC standard 60318-1 & -2 (former 60318)
Temperature range, operation °C / °F TBD / TBD
Battery type TBD
CE/RoHS compliant/WEEE registered No/
Weight g / oz / TBD


G.R.A.S. 43AF-S4 Artificial Ear w/NMS 9A 6cc coupler
G.R.A.S. AA0020-CL LEMO 1B 7-pin Female - LEMO 1B 7-pin Male, Extension cable, custom length
G.R.A.S. 40AG 1/2" Ext. Polarized Pressure Microphone, High Frequency
G.R.A.S. HW1001 Audiometer Calibration Analyzer
G.R.A.S. RA0039 IEC 60318 Eae Simulator
G.R.A.S. EL0001 Battery Alkaline LR6-AA 1.5 V (4 pcs incl.)
G.R.A.S. LI0039 Manual


G.R.A.S. OP0001

Insert Earphone Option (IEC60318-5 2cc Reference Coupler RA0113 for 1” Microphone)
G.R.A.S. OP0002 Free-field Calibration Option (Free-field microphone 46AF, 10 m LEMO cable, tripod adapter and tripod)
G.R.A.S. OP0003 System Verification Option (Sound calibrator 42AB and force gauge)
 G.R.A.S. KM0076 Suitcase