Section 903 Pilot’s Operating Handbook
Bose Headset EXTRA 500
903 Bose Headset
903.1 Section 1 - General
The “Bose Aviation Headset Series II” uses an advanced
combination of electro-acoustical noise reduction circuitry and a
patented cushioning system to significantly reduce aircraft
noise. It actively reduces noise elements in addition to muffling
noise. The “Clear Comfort” cushions require only slight
pressure to provide high passive noise attenuation. As a result,
this headset can be worn comfortably for extended periods.
Caution With the headset’s combination of both active and passive
attenuation, typical aircraft sounds (for example, those from
engine, propeller, warning alarms, and other sound sources)
may sound different. It is strongly recommended that you
ensure you can hear and recognize these sounds while you
are using the BOSE aviation headset while operating the
aircraft.
In addition, should you choose to listen to in-flight
entertainment through a Bose headset while piloting, we remind
you to limit the volume to safe levels so that it does not interfere
with your ability to hear informational sounds, such as those
emitted by warning alarms.
The headset must be worn with the Bose logo on the earcups
facing forward. To achieve comfort and good performance,
adjust both sides of the headband equally to provide a
comfortable fit. To achieve a good seal, lightly grasp both
earcups and position them so that your ears are completely
inside the Clear Comfort cushions. Final adjustment is best
accomplished in a noisy environment with the headset system
turned on. Then, reposition both earcups until the headset seems
quietest.
903.1.a Interconnect Plug
The headset interconnect plug connects the headset cable to a
power source, located in the aircraft control panel. The
interconnect plug is designed for quick connection and removal.
To ensure correct pin alignment, the plug has a keyway. To
insert: rotate the plug until the keyway is aligned; then insert
until it locks in place.
903-2 26. January 2011
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