Otodynamics Otoport Flex - Page 78

CHAPTER NINE
TEOAE test
78
TEOAE test
If either the OAE signal or noise level at a frequency band is greater
than 20dB SPL, an up arrow will appear above the band to the right
of the tick to show the level is o󰀨 the graphical scale.
If no data has been collected, then a histogram will not be drawn and
diamond symbols will be shown instead.
Brackets can be displayed to indicate normative ranges (see
chapter 15 Conguration).
9.2.2 Circles
The Circles display shows a series of small circles. Each small circle
represents the SNR recorded in a particular ½ octave frequency band
when the minimum signal level is met. If the minimum signal level is
not met, the circle will not ll completely, even if SNR criterion has been
achieved. The numbers below the circles indicate the kHz frequency of
the centre of the ½ octave band. When the test has stopped, a tick/check
mark is shown in the circles that passed.
If the test mode is set to Wideband or Narrow (see Conguration,
chapter 15), only one circle is shown. A fuller circle indicates that the SNR
and signal level are closer to the pass criteria. When the test has stopped,
a tick/check mark is shown in the circle if the test has passed.