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52 GN Otometrics A/S
Tests AccuScreen PRO User Manual
6.2.3 DPOAE Diagnostic tests
The LED flashes green during the test.
If the LED is red, this indicates an error during testing:
• The probe is unstable, or
• Artifacts are present, indicating high environmental noise or a
noisy baby.
In these cases, check the test conditions and make sure that the probe
fits.
If the probe does not fit correctly, the screen displays the word LEAK .
Check the probe.
The displayed DPOAE Diagnostic graph
The response or lack of response is shown in the probability circle
during testing.
A response is always in phase. When a response is registered, it is
mapped from the center towards the outer edge of the probability
circle, forming a more or less straight line. A
PASS is determined
with a confidence of 99.7% for all frequencies.
Noise (= no response) is randomly distributed in the circle and will
never reach the outer edge.
If mapping is randomly distributed, the test is heading towards a
REFER . Check the probe fit and the test environment, and make sure
that the patient is calm.
If required, press STOP to stop the test.
Tests with a Stopped result are not saved. Accordingly, they cannot be
retrieved in the View results screens and they cannot be printed
out.
If the message CalFail appears, refit the probe and make sure that it
fits correctly. Restart the test.