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•
Repeat this process until all the desired frequencies have been examined, following the same order as in the tonal test without
masking.
If you want the difference between the masking level and the applied tone to always be the same, activate Automatic Masking mode
through the Test Configuration menu (refer to section 3.4).
•
On the main screen, adjust the desired tone level.
•
Then, adjust the masking level by pressing
•
Press
again or press the Intensity Setting (B) to save the masking level.
•
From now on, when the tone level is modified, the masking level will change automatically in order to maintain a constant
difference.
BONE-CONDUCTION TONAL TEST WITH MASKING
The bone-conduction tonal test with masking is performed exactly in the same way as the air-conduction test with masking, except
for the following:
•
Place the headphones on both of the patient's ears, and the bone vibrator on the mastoid bone of the first ear to be examined
(check the recommendations for placing the bone vibrator correctly in section
•
On the main screen, select the bone conduction mode with masking (
•
When increasing the masking level for the first time, do it until the tone is inaudible, or until it exceeds by 40 dB the tone level
applied to the ear to be examined.
•
If the tone is still audible when the masking level is 40 dB over the tone level, this will be the hearing threshold.
•
Continue with the test in the same way as with the bone-conduction test with masking, until the tone remains audible even if
the masking level has been increased more than 10 dB. This will be the hearing threshold.
•
Examine the other desired frequencies (125 and 8000 Hz frequencies not allowed).
•
Before examining the second ear, select it on the main screen and only change the position of the patient's bone vibrator,
keeping the headphones on both ears.
520-800-MUM · Rev 1.01
DUO
· User's manual
and turning the Intensity Setting (B), until the desired difference is obtained.
BONE-CONDUCTION TONAL
).
EN 20
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