650A and 650AB Pure Tone Audiometer from Ambco

650A and 650AB Pure Tone Audiometer from Ambco

The 650A and 650AB pure tone audiometers are portable and light weight audiometers. They have a tone switch, tone present indicator, Plug-in and battery and a battery indicator. The Plug-in voltage is 110 or 220 volt, 650A. 


  • Five year warranty
  • Extremely accurate
  • Exceeds all specifications
  • Steady and pulsed tone
  • Custom carrying bag
  • Patient response


  • Meets or exceeds ANSI S3.6 1989, (ASA 81-1989) ISO 389-1985, C.H.D.P, O.S.H.A, E.P.S.D.T. F.A.A., Police, Divers, requirements.
  • Frequency Range: 250, 500, 1000, 2000, 3000, 4000, 6000, 8000 Hz Accuracy better than ± 3%, (steady and pulsed tone)
  • Hearing Threshold Range: 0 to 90dB in 5dB steps Accuracy better than ± 2 dB
  • Harmonic Distortion - less than 3%
  • Power: 110-230 VAC, 50-60 HZ UL, C.S.A. approved power supply. Long hour operation on one 9 volt battery (650AB).
  • Total Weight less than 4.5 Ibs (complete with headset, TDH 39 earphones, patient response, audiogram pad and carrying bag.)


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