otometrics MADSEN Midimate 622, Руководство пользователя

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9.2 TALK OVER
OPERATOR TO PATIENT
The Talk-Over function enables the patient to receive verbal information
from the operator via the output transducer in use, e.g. the headset, the bone
conductor and the loudspeakers, but not the insert phone which is only
intended for masking purposes. I.e. the operator may communicate with the
patient.
This capability is not only needed when a sound cabin is employed, but also
when the ME 70 Noise-Excluding headset is used as otherwise the patient
would have great difficulty hearing the operator.
In the MIDIMATE 622, the Talk-Over microphone is also the microphone
used for live voice presentations and the Hearing Level presented may be
precisely calibrated in dB HL (see below). Talk-Over & Live
Voice Microphone
To present live voice, Speech must be selected in the test setup and the
audiometer will always start the test in Reverse, i.e. the stimulus is
continuously presented and the Tone Switch becomes an interrupter.
Press the Talk-Over pushbutton (#16 in the pull-out drawing of the front
panel located at the back of the manual) to access the Talk-Over Mode and
interrupt the presentation of stimulus permitting communication with the
patient. To Access Talk-
Over Mode
This pushbutton also displays the Talk-Over Level in dB for the purposes of
adjustment. To Adjust the Talk-
Over level
The display will show the level presented to the patient directly in dB HL and
this level may be changed by turning any of the rotary knobs.
If using a Talk-Over microphone instead of the stetomike, ensure that the
microphone is no more than 20-25 cm from your mouth while speaking into it.
Adjust the Talk-Over Level so that it is comfortably audible for the patient.
The selected level will be stored, even after the audiometer has been
powered off.
NOTE : The MIDIMATE 622 is supplied with the internal microphone
selector set for electret. If you wish to connect a dynamic Talk-Over
microphone, call your local service representative!
MIDIMATE 622 OPERATION MANUAL 9. Patient Communication & Monitoring
54