Using The Headset; Wearing And Adjusting The Headset; Conditions Related To Fit; Microphone Placement - Bose A20 Aviation Owner's Manual

English Tab 2, 10

Wearing and adjusting the headset

Proper fit on your head is important both for comfort and optimal noise
reduction performance. Here are a few guidelines:
• Use the left (L) and right (R) markings above the earcups to orient the headset
properly.
R
• As you put the headset on, lightly grasp each earcup and adjust it so its
cushion is completely over your ear. You should feel an even, gentle pressure
all around each ear.
• Adjust the headband so it rests gently on top of your head.
Make your final adjustments with the headset powered on in a noisy
environment.
In very loud conditions, such as during takeoff, you may experience a brief
reduction in Acoustic Noise Cancelling
momentary pressure change. If the problem continues when the sound level
returns to normal, see "In case of difficulty" on page 27. If the problem persists,
®
contact Bose Technical Support for assistance.

Conditions related to fit

A low rumbling sound or frequent, brief losses of Acoustic Noise Cancelling
noise reduction may indicate an improper fit or blocked earcup ports. See
"Headset earcup openings" on page 23 for instructions on removing
blockages.
During a long flight, you may feel a slight pressure point, which can be relieved
by adjusting the headband position. Your experience with using the headset will
help establish a sense of how it should sound and feel.

Microphone placement

Microphone placement is important for clear communications. With the
headset on your head, make these adjustments:
Tab 3, 11 Tab 4, 12 Tab 5, 13 Tab 6, 14
U
SING THE
L
®
as the headset compensates for a
Tab 7, 15 Tab 8, 16
H
EADSET
13