TM 11-5830-263-10
i. While keeping the right strap tight, press it against free end of the the left
strap and smooth the right strap over the left with enough pressure to engage the
velcro fasteners (View D).
j. Check that the headset is tightly secured to the helmet and retighten if
necessary to obtain the best sealing of the earseals against the head.
k. Using the thumb tabs between the neckband and each earcup (View A),
adjust the spread of the earcups to provide: (1) the best seal to your head
entirely around each ear and (2) as much comfort as possible.
NOTE
Moving the tabs apart angles the earcups to
increase pressure against your head at the rear.
Moving the tabs together angles the earcups to
increase pressure against your head at the front.
l. Check that the microphone tip is centered on and and 1/4 inch from your
lips.
NOTE
Microphone must be close to your lips for noise
cancellation to be fully effective.
m. If adjustment is required, adjust microphone ball joint to place
microphone tip as close as possible to being centered on and 1/4 inch from your
lips.
n. If microphone needs further adjustment, loosen thumbnut on left earcup
(and, if necessary, pivot microphone) and reposition microphone to bring the
microphone to the centered, 1/4 inch spacing and tighten the thumb nut.
NOTE
If this is the first fitting of your headset and some
discomfort is noted, re-check the adjustments of
your helmet (Figure 2-22) and your headset
(steps b. through k. above). If serious discomfort
can not be alleviated by careful adjustment of
helmet and headset (including disconnecting the
camouflage cover straps if too tightly stretched
across the recess in the helmet) request
exchange of your helmet for the next larger size.
REMOVING THE CAPS/ACAPS HEADSET
a. Unfasten the velcro straps on top of the helmet.
b. Slide the earcups down and to the rear.
c. Grasp the earcups and spread them apart.
d. If ACAPS headset, check that ANR/OFF/TTC switch is in the off
position.
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