Interacoustics AT235 Instructions For Use Manual page 52

AT235 Instructions for Use - EN
Eustachian tube function 1
– Non perforated eardrum
Eustachain tube function 2
- Perforated eardrum
Eustachian tube function 3
- Patulous Eustachian tube
Reflex Functions
Signal sources: Tone - Contra, Reflex:
Tone - Ipsi, Reflex:
NB noise – Contra, Reflex
NB noise – Ipsi, Reflex
Stimulus duration:
Reflex Acceptance
Intensity max
Outputs: Contra Earphone:
Ipsi Earphone:
Probe connection
Test types: Manual Reflex
Automated Reflex
Reflex Decay
Reflex latency
Audiometer Functions
Signals:
Test types Auto Threshold Determination (Modified Hughson Westlake).
Frequencies Hz: Intensities dBHL:
125 -10 to 70
250 -10 to 90
500 -10 to 100
1000 -10 to 100
2000 -10 to 100
3000 -10 to 100
4000 -10 to 100
6000 -10 to 100
8000 -10 to 90
Williams test
Toynbee test
Continuous sensitive impedance measurement
250, 500, 1000, 2000, 3000, 4000, 6000, 8000 Hz,
Wide Band, High and Low pass
500, 1000, 2000, 3000, 4000 Hz wide band, high and
low pass.
250, 500, 1000, 2000, 3000, 4000, 6000, 8000 Hz
1000, 2000, 3000, 4000 Hz
1.0 sec
Adjustable between 2% and 6%, or 0.05 – 0.15 ml
change of ear canal volume.
90, 100, 120, dBHL.
TDH39 earphone, DD45 earphone, CIR33 insert
and/or EARtone 3A insert for Reflex measurements.
Probe earphone incorporated in the probe system for
Reflex measurements.
Connection of the electrical and air system to the
probe.
Manual control of all functions.
Single intensities
Reflex growth
Automatic, 10 dB above threshold and manually
controlled with stimulus durations of 10 .
Automated, first 300 ms from stimulus start.
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