Chapter 2 - Installation
The selection of any stimulus will deselect a previously selected stimulus on the
opposite channel if the stimuli are not compatible.
Test Microphone/Monitor Headset
The lightweight test microphone/monitor headset supplied with the GSI 61 provides
the operator complete comfort and utility.
A standard microphone is positioned at the end of the adjustable boom. The
microphone boom rotates 225 degrees so that the microphone may be worn on either
the right or left side of the head.
Place the headset on the head by spreading the headband slightly. Then locate the
receiver directly on the ear and slide the headband to adjust the fit. The microphone
must be positioned close to the tester’s mouth so that the filter is almost in contact
with the lower lip. The white dot on the base of the microphone must face the
tester’s mouth.
The GSI 61 permits the operator to speak through the test microphone into the test
transducer at continuously variable intensities from 45 dB HL to 90 dB HL in the
Talk Forward mode. The tester’s lips maintain a constant distance from the
microphone enabling the VU meter to uniformly average at 0 dB for live voice testing.
A lapel clip and a 10 foot coiled cord with a quick disconnect are included. The
telephone jack connector attaches the test microphone/monitor headset to the rear
panel.
2-17
1761-0100 Rev. B
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