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  5. AMBCO - Model 650A - Pure Tone ...

AMBCO - Model 650A - Pure Tone Audiometers

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Portable, light weight, Easy to use tone switch,  Tone present indicator, Plug-in 110 or 220 volt, 650A, Plug-in and battery, 650AB, Battery life indicator, Five year warranty, Extremely accurate, Exceeds all specifications, Steady and pulsed tone, Custom carrying bag, Patient response.

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  • 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.)