7
D-0116493-B (OM015) – PC850 Operating Manual
The patient is seated in front of the desk facing away from the operator. The patient wears a headset (see
below) and responds to test stimuli by use of a hand-held switch which is also connected to the instrument.
Headset
The headset must be fitted by a qualified person to ensure a proper seal and comfortable fit. The leads from
the headset are connected to the instrument and the headset is then fitted to the patient.
Patient Instructions
The patient is given the following instructions: “Press and then release the response switch when a tone is
heard”.
• In the case of Manual or Computer testing – “As soon as you hear the tone, press and release the
response switch”
• In the case of Bekesy testing – “press and hold the response switch when a series of pulses are heard,
and release when the pulses are no longer heard”
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