22 - ENGLISH
TROUBLESHOOTING
Problem What to do
Squealing or
whistling sound
when the head-
set is turned on
• Make sure the headset orientation is correct. Use the L (left) and
R (right) markings inside the earcups to correctly orient the headset.
• Inspect the seal between the ear cushion skirt and the earcup. The skirt
should fit into the slot on the earcup with no gaps. Replace any cushions
that appear to be worn out.
• Adjust the earcup fit to create a better seal on your head. The headset’s
low-force design makes it sensitive to items that interfere with the seal
around your ear. Make sure your ears are completely inside the ear cush-
ions, and that a hat or eyeglasses with thick temples do not interfere with
the seal.
• Make sure the headset ear cushions, internal ear cup foams, and scrims are
dry. If not, air dry and retry the headset. If problem persists, contact Bose
technical support.
DON’T use the headset if it emits a loud squeal or other loud noise. Contact
Bose technical support if the headset emits any loud or unusual noise.
Low rumbling
sound with the
headset turned
on in a quiet
environment
• Adjust the earcup fit to create a better seal on your head. The low-force
design of the headset makes it sensitive to items that interfere with the
seal around your ear. Make sure your ears are completely inside the ear
cushions, and that a hat or eyeglasses with thick temples do not interfere
with the seal.
• Inspect the seal between the ear cushion skirt and the earcup.
The skirt should fit into the slot on the earcup with no gaps.
Replace any cushions that appear to be worn out.
Crackling sound
audible with
headset turned
on in a loud
environment, or
noise reduction
is intermittent
• Make sure the headset orientation is correct. Use the L (left) and
R (right) markings inside the earcups to correctly orient the headset.
• Adjust the headset fit. See “Adjusting the headset fit” on page 13.
• Replace the AA alkaline batteries in the control module
(see page 7).
• Inspect the seal between the ear cushion skirt and the earcup.
The skirt should fit into the slot on the earcup with no gaps. Replace any
cushions that have surface tears, torn stitching joints, large wrinkles, or
have become dried and sti.
• Try another belt pack.
• Move closer to the radio base station. A typical wireless belt pack range is
30-50 yards.
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