Interacoustics AT235 - Page 29

AT235 Additional Information Page 25
E
Stop pressure. The stop pressure for the three automated tympanograms is selected here. The
stop pressure can vary between +300 and -600 daPa. The Non-Perforated Eardrum test is
performed.
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 cavity that is 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
• Medium, which results in a constant speed of about 200 daPa/s
• Slow, which results in a constant speed of about 100 daPa/s
• Very slow, which results in a constant speed of about 50 daPa/s
G
Show normative box can be selected to show a rectangle in which the compliance peak is
expected under normal conditions of the middle ear.
H -
K
Normative box minimum and maximum pressure and compliance values are defined here.