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 RA300 & RA300 Plus

Affordable, dependable, and innovative, the RA300 and RA300 Plus from Tremetrics bring a new level of automation to a broad range of screening programs. These audiometers require minimal operator training and provide valid hearing tests automatically.

With automatic, semi-automatic, and manual test modes, screenings can be completed in as little as three minutes.


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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.)

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  • Test Frequencies: 500, 1000, 2000, 3000, 4000, 6000, 8000 Hz
  • Test Modes: Automatic, semi-automatic, and manual
  • Frequency Accuracy: Better than 1% crystal controlled
  • Rise/Fall Time: Meets ANSI specifications
  • Distortion: Total harmonic distortion below 40 dB (1%)
  • HL Attenuator: 0 dB to 100 dB in 5 dB steps, accuracy ±1 dB
  • Electronic Calibration: Through keyboard; or through computer with compatible software program (optional)
  • Data Output: 600-19200 baud, selectable


  • Meet ANSI and OSHA requirements
  • Complete tests in as little as three minutes
  • Automatic daily biological check with OSCAR
  • RS232C computer/printer interface
  • Flexible reporting formats 

ALSO AVAILABLE: RA300+ with increased storage (enough for 64 audiograms), internal talk-over microphone and additional multimedia capabilities when used with FOSHM.