otometrics Madsen Xeta, Reference Manual

Page: 71 / 108

• Set the initial level of the presented signal to an audible level: Turn the Level knob to
40 dB HL.
This is to familiarize the patient with the test signal. Other familiarization procedures may be
preferred.
• If you intend to test both ears, test the better ear first. If this is unknown, start with the right
ear. Press
L<-->R to select the ear you wish to test.
Testing
1. Press the
Present
button (right or left) to present the tone to the patient for 1 to 1.5
seconds.
2. If the patient does not respond to the presented signal, turn the Level knob to increase
the signal level in steps of 10 dB until the patient responds.
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 unmasked 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 items 3 to 6 .
7. When the threshold is determined, press
Store
to store that particular threshold in the
selected patient record.
8. Turn the
Frequency
knob to 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 .
Otometrics - MADSEN Xeta 71
7 Testing a patient with MADSEN Xeta