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Active calibration: AHR
The head movements in this calibration are active, where the patient moves his own
head.
The patient is instructed to keep their eyes on the target shown on the screen and to
swing the head gently to the right and left (as if saying with the head "no-no") trying to
follow the rhythm of the metronome
When all warnings are valid the calibration starts automatically for about 20 seconds
(See: Protocol Settings).
When you hear the metronome, you should start moving your head to the right and
left alternately and the screen will show the graph of the position of the eye and head
in time.
Passive Calibration: VHIT
The head movements in this calibration are passive. The examiner should perform
head calibration by standing behind the patient and holding the head in the same way
as during the cephalic impulse test of the lateral channels. When the alarms are valid
the calibration will start automatically. Approximately for 20 seconds (configurable) the
examiner should perform the sinusoidal oscillations in both directions following the
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