Otodynamics Otoport Flex - Page 127

Otoport OAE+ABR
User Manual for Otoport DP+TE model
127
Conguration
Norms
Norms allows the user to set the expected range of OAE response levels.
This range is then marked on the DP-gram or bar-chart screen during tests
as a visual aid.
Setting Norms does not a󰀨ect any pass criteria that has been set. Pass
criteria are based on signal-to-noise ratios and are intended for screening
applications or for data quality control. Norms are based on dBSPL values
and are intended to aid clinical interpretation.
Normative OAE levels are dependent on the test population (particularly
their age) and on test settings (particularly stimulus levels). Norms may
be set in any test mode but default values are only set for the DP 12
Frequency test. The default values provided were derived by interpolation
from data listed here:
http://www.hearingreview.com/2013/10/an-overview-of-oaes-and-
normative-data-for-dpoaes/
The default norm levels in the Otoport represent the range from the 10th
to the 90th percentile of the test population (aged 18-25). This means
that 80% of DPOAE levels should be between these marked norm levels.
These norms values are provided for indication only; you should develop
your own norms locally by collecting results from individuals within your
target population with normal hearing, or by consulting the literature.
When Norms is highlighted, press the right arrow key to edit the values. A
pop-up table appears showing Low (minimum) and High (maximum) Norm
levels for each test frequency. All Norms default to O󰀨. Use the left and
right arrow keys to set the Norm level (range -10 to 20dBSPL). Use the
up and down arrow keys to change between frequency. Selecting Down
at the bottom of the Low column provides access to the High column.
Selecting Up at the top of the High column allows access to the Low
column settings.
Select Back when you have nished editing the Norms.