AA222
Operation Manual
Page 75
To select the SISI test in the
Audiometry mode press “Function” (shift
(18) with 25). In the Function Screen mode press F3 to select the
SISI test.
Figure 37:
A)
Select the desired test ear by choosing “right “ or “Left” ear
(19,20). T
he frequency is selected by pressing “Decr” or “Incr”
(27 and 28) and the intensity is selected by dialling
the “HL dB”
rotary dial (26) (frequencies between 500 and 4000 Hz and an
intensity 20 dB above hearing threshold are recommended for
SISI testing).
As soon as being in the SISI Audiometry mode, see figure 29, a
continuous tone will be audible with 5 dB modulation increments
automatically presented at random. This is to familiarise the patient to
discriminate the modulation, and let him respond via the patient
response button.
B)
When the patient understands the test procedure, start the
actual SISI test by pressing F3 “1 dB”. Now AA222 will present
1 dB modulation increments at random and the patient is
meant respond to these increments - if he can discriminate
them.
Summary of Contents for AA222
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