The
Interacoustics
AT235h
is an automatic impedance audiometer well suited for clinics doing screening, as
well as diagnostic work.
Neonatal screening programs will particularly appreciate the presence of high
probe tone tympanometry,
allowing more reliable tympanometric results in neonates.

High Frequency Tympanometry
In
addition to the standard 226Hz probetone tympanogram, it is possible to record a
similar tympanogram using a higher frequency probetone. As different screening
protocols call for different frequencies of the high probetone, the AT235h
offers 678Hz, 800Hz or 1000Hz as selected by the user.
Reflex
testing is very easy, but allows also those in need of versatility to control
all details of the test. Two separate test protocols may be programmed and
either may be selected by the push of a button. All parameters are easily
programmable by the end user if the supplied tests are not optimum suited for
test routines of the clinic. In addition to testing with a set of fixed
intensities, available automated functions include automatic intensity search
and automatic test for reflex growth.
The AT235h does not restrict mixing of ipsi and contra stimuli and also features
noise for stimulation.
There
are few limitations on storing and printing of reflex results, as more than 40
reflexes may be stored per ear.
Reflex
test with full manual stimulus control is also available, and this manual
function also allows repeating or changing test result obtained by one of the
automatic test protocols.
Decay – Contra and Ipsi
Acoustic
reflex decay test is available with ipsilateral stimulation as well as with
contralateral stimulation.
Children’s Train
A
train may be displayed on the screen, to get the attention of the child. Test
results can be monitored simultaneously with displaying the train.
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