Interacoustics AA222 Additional Information page 26
Impedance audiometer
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Also See for AA222:
- Instructions for use manual (1061 pages) ,
- Instructions for use manual (93 pages)
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AA222 Additional Information
4.2.2.1
Tymp settings
Select a tymp test in your Protocol settings. By rotating the wheel, the following settings can be selected and
changed.
A
Auto run. When enabled, the test will run automatically as part of the protocol.
Probe tone frequency. The frequencies which can be selected are 226 Hz (recommended for
B
normal testing), 678 Hz, 800 Hz, 1000 Hz (usually recommended for testing babies up to 6 months
of age.
C
Start pressure. To select the start pressure for automated tympanometry. The start pressure can
vary between +400 and -600 daPa. For calculating the equivalent ear canal volume, the
measurement points at starting value are taken.
Stop pressure. To select the stop pressure for automated tympanometry. The stop pressure can
D
vary between +400 and -600 daPa.
E
Add reversed sweep. When enabled, the automated tympanometry will run a tympanometry from
start pressure to stop pressure and back to start pressure again.
Pump speed. To select the pump speed for automated tympanometry. The stated pump speeds
F
are dependent on the size of the ear canal or the cavity being used during the measurement. The
numbers below are therefore rough estimates.
• Automatic, is the high pump speed which automatically slows down to low pump speed around
the peak of the tympanogram. We recommend using this setting for screening and normal
tympanometry tests.
• Fast, results in a constant speed of about 300 daPa/s.
• Medium, results in a constant speed of about 200 daPa/s.
• Slow, results in a constant speed of about 100 daPa/s.
• Very slow, results in a constant speed of about 50 daPa/s.
G
Manual mode minimum pressure allows you to set the lower limit of the pressure range during
manual tympanometry.
Manual mode maximum pressure allows you to set the upper limit of the pressure range during
H
manual tympanometry.
Gradient. Gradient as either a measure of compliance (in ml) or as a measure of pressure (in
I
daPa). Select to display the gradient.
Page 22
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