otometrics Madsen Xeta, Reference Manual

Page: 69 / 108

3. Reduce the signal level by 20 dB until the patient does not respond to the signal.
4. Increase the signal level in steps of 5 dB and present the signal to the patient at each level
until the patient responds to the signal.
5. Reduce the signal level by 10 dB and present signals at levels increased by 5 dB until the
patient responds.
6. Repeat item 5 , 1 to 3 times until the patient has responded 3 times at the same level.
This level represents the hearing threshold at 1000 Hz based on 3-5 ascending series.
In some situations, it may be satisfactory with two responses at the same level.
If the patient has responded less than 3 times at the same level after 5 series, present a signal
at 10 dB above the level where a response was last registered.
Then repeat item 6 .
7. When the threshold is determined, press Store to store that particular threshold in the selec-
ted patient record.
8. Select the next frequency.
You can link the Store and Next Frequency functions, so that the test progresses with the next
frequency when you press
Store
. See AC store: Change freq.
►
59 .
9. Continue to use the right and/or left Level knob to increase/decrease intensities until you
have determined all thresholds.
Note
•
If the thresholds measured at 1000 Hz in the ear differ by 10 dB or more, even the
other frequencies should be retested.
10. Continue to press Store after each threshold is found to store that particular threshold.
11. After each threshold is determined and stored, you will notice that as you turn the
Level
knob
to scroll frequencies, each stored threshold at that particular frequency will be marked by an
asterisk (*) and the relevant audiogram symbol indicating the stored threshold.
12. If you are not performing the test online with the OTOsuite Audiometry Module, plot the res-
ults in an audiogram sheet.
13. Repeat this procedure for the other ear.
If the difference between the thresholds in the two ears is 40 dB or greater, it is recommended
that you test the poorer ear again with masking applied to the better ear. See
Testing with mask-
ing ► 72 .
14. If required, select the next patient record (press Previous/Next ) or press New Patient .
Otometrics - MADSEN Xeta 69
7 Testing a patient with MADSEN Xeta