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, HDA 200, HDA280 and HDA 300.

The configuration includes a G.R.A.S. Audiometer Calibration Analyzer, two complete sets of standardized ear simulators and a coupler platform.

Typical Applications and Use

Typical users are:

  • Owners of Audiometers
    • Hospitals, ENT-department (ordinary and military)
    • Hearing clinics
    • Hearing aid fitters / dispensers
  • Calibration service providers
    • Test houses / Certification labs
    • On-site calibration providers

Typical applications and uses:

  • 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
ANSI standard S1.40, S1.43, S1.11, S3.6
IEC standard 60318-1 & 60318-2
G.R.A.S. Sound & Vibration reserves the right to change specifications and accessories without notice.


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. KM0078 Suitcase

 G.R.A.S. Sound & Vibration reserves the right to change specifications and accessories without notice.