OtoRead Screener Operating Instructions Page 20
Display # 3
This display shows two horizontal bar graphs representing the
environmental noise (NOISE) and the ear canal volume
(VOLUME). When both bars fill the screen from left to right,
the environmental noise is high and the ear canal volume is
large. As the unit is inserted into the ear canal, both horizontal
bars should decrease from right to left indicating a decrease in
environmental noise and ear canal volume. To obtain a seal
and measure emissions, gently insert the eartip into the
patient’s ear canal. It should fit snugly and comfortably.
The best test results are obtained when an eartip is inserted
deeply into the ear canal instead of flush with the ear canal
opening. The NOISE and VOLUME bar readings should be
used as an indication that the unit is sealing the ear canal. If
the VOLUME and NOISE bars continue to fill the screen, the
unit is not sealing the ear canal, and appropriate adjustments
should be made until a decrease in these bars is seen.
Note that for an adult, the VOLUME bar will decrease to about
half (Display # 4), while for a newborn or child, the VOLUME
bar will decrease further to the left (Display # 5). The NOISE
bar will show a decrease from the original reading. When a
seal is obtained, the unit will automatically begin testing (auto
start) and the yellow test LED will illuminate throughout the
test.
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