e3 Diagnostics

With so many noise hazards in the workplace, frequent screening of employee hearing is of the utmost importance. That’s why e3 Diagnostics offers a wide variety of premier hearing test equipment specific for occupational health professionals.


Tremetrics RA650

A four-channel system that packs comprehensive audiometric testing capability into a small package, the Tremetrics RA650 includes automatic, semi-automatic, and manual test modes.

The RA650 links audiometer modules together by a group controller, which can start and stop all tests simultaneously. Up to 48 subjects can be tested per hour from one PC, simplifying group testing.


Request a Quote

We understand that you have a choice when it comes to choosing your equipment and are dedicated to providing you with the highest quality instrumentation available.Contact us now for your free, no obligation quote and discover why we are the preferred Authorized Distributor and Service Provider to the world’s leading manufacturers.  (Completing our online form does not sign you up for electronic advertising.)

Request Quote



  • Standards: ANSI S3.6 (1996)
  • Test Frequencies: 500, 1000, 2000, 3000, 4000, 6000, 8000 Hz (8000 Hz selectable)
  • Frequency Accuracy: Better than 1%, crystal controlled
  • Distortion: Total harmonic distortion below -40 dB (1%)
  • HL Attenuator: -10 to 100 dB in 5 dB steps
  • HL Accuracy: ±1 dB Calibration: EEPROM calibration, frequency requires no adjustment; calibration date entered at time of calibration
  • Rise/Fall Time: Meets ANSI specifications


  • One operator can simultaneously manage eight tests (48 tests per hour) from PC or laptop
  • Advanced software adapts automatically with difficult-to-test subjects
  • Computer-voice instructed testing and monitoring (US Patent #6,416,482; #6,468,224; #5,811,681)
  • Individual and group audiogram printouts
  • Interfaces with FOSHM or other PC data management software
  • Fully automatic, semi-automatic or manual testing options
  • Automatic pre-test instructions (US Patent #6,416,482; #6,468,224; #5,811,681)
  • Multi-media hearing testing in the subject's preferred language (US Patent #6,416,482; #6,468,224; #5,811,681)