TYPE 4157

Artificial Ear/Ear Simulator (IEC 60318-4 coupler with microphone and preamplifier)

Designed for measurements on earphones coupled to the ear by ear inserts such as tubes or ear moulds or eartips

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The Ear Simulator Type 4157 closely reproduces the acoustical parameters of the human ear, presenting the insert earphone under test with an impedance approximating that of the real human ear.


  • Frequency response, sensitivity and distortion measurements on insert earphones, e.g. used in hearing aids, operator headsets, etc.
  • Servicing of hearing aids
  • Production testing of earphones