The calibration check may not pass under certain conditions:

  1. There is too much noise in the room. For example, when there is traffic noise, vibrations from people walking around, etc. The calibration check must be done in a quiet room and the device placed on a soft surface. For example, do not put it on a table. Use a soft pad or pillow if you are running into bad calibration.
  2. The earphone nozzle may not have been properly inserted into the calibration cavity. Please insert the nozzle fully into the calibration cavity.
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Eva

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iHearMAX

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iHEARHD

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