Insert Earphones For Audiometry

All the Features of the ER•3A:

  • Approximates TDH-39, -49 and-50 response at the eardrum
  • 70+ dB isolation between ears: reduces the need for masking
  • Eliminates collapsed ear canal problem
  • 30+ dB external noise exclusion
  • Calibrated in 2 cc Coupler
  • Can be calibrated according to ANSI S3.6-1996
Plus:
  • 20 dB higher maximum output at 6 and 8 kHz than ER•3A
  • Easier to calibrate at high frequencies
  • No front tubes

System Includes

  • Earphones (10 Ohm or 50 Ohm immittance)
  • Dual-mono 7 ft. cable assembly
  • 50 foam eartips (regular, 13 mm)
  • 10 foam eartips (baby, 10 mm)
  • 4 foam eartips (jumbo, 17 mm)
  • Neckstrap
  • Shirt clip
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