Item No. 8105087 – 12/2013 Page 2 of 6
This process sets up the conditions to allow comparison between the external microphone and the
internal probe microphone. Once placed in the ear canal this will show the effect of the ear canal and
hearing device amplification.
The calibration can be checked in the upcoming REUG measure through running a measurement in
the same configuration as the calibration. When this is done a flat trace with a gain value at 0dB
should be shown, please see the example below.
2. Real Ear Un-Aided Gain (REUG) – this step is the first to be performed when the probe microphone
has been positioned in the ear. It is purely a measurement of the ear canal without any Hearing Device
applied and shows the patients ear acoustics. This will display a trace similar to the below, peaking
between 2-4kHz and intersecting the x-axis at 6kHz between 0 and -5dB.
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