GN Otometrics A/S
35
CAPELLA Cochlear Emissions Analyzer
User Manual
4.5
DPOAE: Input/Output
1.
Click on the
DP-I/O
icon or choose
Distortion Product
(DPOAE)
in the
Mode
menu and
DP-IO
in the submenu.
2.
From
Parameters
in the
Setup
menu. select
DP1
or
DP2
for
analysis, change if required
Noise criteria
,
Stop criteria
and
Noise estimate
, and define
Start level
,
Increment
and
Stop level
. The DP-I/O measurement will be carried out
automatically only if stop criteria are defined. If this is not the
case, you must click on
Stop
to end the measurement, use the
up
and
down
arrow keys on the keyboard or on screen to
change the
F1 level
, and then click on
Start
to resume meas-
uring.
3.
Select frequency by using the
right
and
left
arrow keys on
the keyboard or in the
Frequency
box on screen.
4.
Click on
Start
to begin measuring.
5.
If you wish to halt the measurement momentarily, click on
Pause
. Click on
Continue
to resume the measurement.
6.
Measurement status can be monitored by observing the
Sweeps
and
Statistics
boxes on the lower right part of the
screen. The noise floor during the measurement is also indi-
cated by the blue vertical bar to the right of the DP-Gram. The
normally green DP-dot turns yellow if lower than the noise
floor or outside the dynamic range of the instrument.
7.
Click on
Stop
to end the measurement if you have disabled
Stop criteria
.
8.
Use the
up
and
down
arrow keys on the keyboard or in the
F1 Level
box on screen to view the amplitude spectra and
data for the various presentation levels.
9.
Up to 6 measurements can be made for each ear. Click on the
arrow
keys in the
Meas. No.
box on the lower left to make a
new measurement or to view other measurements made on
the same ear during the session.
10.
Repeat the procedure beginning with
Probe fit
for measuring
the other ear.
