Workplace INTEGRA has a used 4 station Tremetrics RA 650 audiometer available for sale for $5,275.00. This price includes the 4 audiometers and 1 Oscar 6, bio-acoustic simulator. The audiometers will be calibrated prior to delivery. Shipping will be additional or you can pick up the unit in Greensboro, NC.

All of the equipment is in good condition and working great. This equipment is sold as is.

Please contact us at or call 888 974 0001 ask for Jim, for more information.

More on the Tremetrics RA 650

PC Based Audiometer

  • Allows the operator to test up to eight people simultaneously
  • Fully compatible with HT ProTM Software Suite
  • Audiometer modules can be purchased one at a time or all at once, allowing you to buy modules as needed


• Extremely reliable unit, leaving you the ability to test with no worries about being down for repairs

Unparalleled reliability and accuracy at a very competitive price

With the ability to test as many as 32 people in an hour with an eight station system, the RA650 will save you both time and money. The RA650 also maintains a small footprint, using a control module housed with the audiometer modules to link all the stations together. Tests can be started, stopped and paused without interrupting other tests.

When used in conjunction with the HT Pro Software Package, the RA650 becomes the total package for hearing conservation. With the addition of the RA650 and HT Pro, you are in a position to excel in your mobile testing environment. All three devices can create features that include a live feed of tests as they are occuring, nearly unlimited filtering and reporting capability, separate databases for separate companies, and the ability to network your computers to keep your data safe.


RA650 chassis, power supply/controller audio channels: Accepts up to a maximum of four (4) RA650 audiometer channels 

Two RA650 chassis can be used to test up to eight subjects; Control Channel: One control model per chassis 

Power: Auto-selectable 90-240 VAC ± 10%, 50-60 Hz 

Dimensions: 6.5” W x 12.5” D x 9” H 

Weight: 6.5 lbs. (1-station without earphones or handswitch); Communications: RS232C at 19200 Baud 

Software interface: Manages up to eight (8) audiometer modules 

Audiometer Module 

Equals or exceeds ANSI S3.6-1969-2010 

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 

Earphones: Telephonics TDH-39, 10 ohm earphones in Model 41 cushions 

Dimensions: 1” W x 11.25” D x 6.25” H 

Weight: 0.5 lb 

Power: Supplied by mainframe 

Options Foshm 

Windows based hearing conservation data management software 

Audiocups – Noise attenuating enclosures 

OSCAR 6™ – Electro-acoustic ear 

RA650 Group Audiometric Testing System 

Microphone provides talk-over communication with any or all test subjects 

Proven reliability and support 

The RA650 series has a proven track record in both the military and civilian group testing market. Systems are backed by a nationwide dealer network and factory support group. Both are committed to quality customer service and fast response. 

System Features 

Windows-based program software requires minimal operator training 

PC monitors progress of test and automatically instructs subject as required 

Flexible group testing – audiometer modules can be added as needed 

Full automatic, semi-automatic or manual operation 

Independent error checking with automatic test restart 

Selectable retest criteria: automatic retest if HTLs vary 15 dB or more from baseline 

Intercom – talk-over communication with any or all test subjects 

Distinctive graphic symbols and color coding for quick and accurate set up 

Automatic pre-test instructions 

Power supply indicator 

Printer Requirements 

Windows compatible, laser or inkjet recommended 

Computer Requirements 

The RA650 must be used with a PC Data Management System. The PC and database management software are not included in the price of the RA650. 

Tremetrics can provide pricing for the FOSHM PC Data Management System upon request. PC running WindowsTM 98, ME, XP, NT or 2000 with a minimum of 40 MB available space on the hard disk for program and storage, minimum 256 MB of RAM, CD-ROM drive (CD-RW is recommended for data back-up), and 600 x 800 minimum color monitor. 

Multimedia requirements: sound card, microphone, speaker(s) and 1/8” stereo cable (male connector on each end). Input/Output: one serial port (RA232C) and one parallel port for printer.


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