Interacoustics AT235 Additional Information

AT235 Additional Information Page 15
3.2.1 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. Once enabled for a test auto run will cause this test to be automatically run as part of
the protocol.
B
Probe tone frequency. The frequencies which can be selected are 226 Hz (recommended for
normal testing), 678 Hz, 800 Hz, 1000 Hz (usually recommended for testing babies up to 6 months
old).
C
Start pressure. The start pressure for automated tympanometry is selected here. 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.
D
Stop pressure. The stop pressure for automated tympanometry is selected here. The stop
pressure can vary between +400 and -600 daPa.
E
Add reversed sweep. When the checkbox is marked, the automated tympanometry will add a
sweep from the stop pressure back to the start pressure.
F
Pump speed. The pump speed for automated tympanometry is selected here. The stated pump
speeds 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, which results in a constant speed of about 300 daPa/s

Interacoustics AT235 Specifications

General

Brand	Interacoustics
Model	AT235
Category	Measuring Instruments
Language	English