AEA Pilot's Guide 2018-2019 - 64

LEND US YOUR EARS
Continued from page 63

rests some form of ear seal, sometimes foam, sometimes
a gel or thick liquid in a form-fitting material to affect a seal
between the ear cups and the user's skull. A set of wires
connect the two ear cups and a boom microphone, which
rounds out the audio technology.
One set of wires ends in a male jack that connects
the ear cups to the audio source; another jack connects
the boom microphone. As a system, these two sets of
conductors carry current from the intercom.
Anatomy of a passive headset
The passive headset comes as described above:
speakers in the shell, sound installation, headbands, ear
cups, wires and jacks.
Some versions deliver stereo sound through morecomplicated wiring; others are strictly monaural. And many
stereo models sport a switch to go between stereo and
monaural.

Advising pilots on a choice should include an opportunity
for the prospect to try on the headset for fit and clamping
pressure. For best consideration, a demo flight can't be
beat. Then the prospective buyer can truly weigh the audio
quality, volume setting needed, comfort and clarity.
Benefits of a passive headset: inexpensive; lightweight;
never need batteries; wide variety of choices.
Disadvantages of a passive headset: wide variation in
sound attenuation - some models simply deliver less sound
attenuation than others; and fit can be difficult to adjust
since the ear cups must seal for the best performance.
Anatomy of an ANR headset
Similar to the passive headset components described
above, the ANR headset typically employs all the same said
components as described, plus a couple of additional items.
Beyond the common speakers in the shell, sound
installation, headbands, ear cups, wires and jacks, each
ANR ear cup will carry a small, sensitive microphone, an
additional speaker driver, and electronic circuitry to process
what the microphone "hears" into the counter sound to

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- 64 -

* FAA Repair Station
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* Garmin, S-Tec, L3,
and Aspen Dealer



Table of Contents for the Digital Edition of AEA Pilot's Guide 2018-2019

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http://www.brightcopy.net/allen/pilotsguide/19-20
http://www.brightcopy.net/allen/pilotsguide/18-19
http://www.brightcopy.net/allen/pilotsguide/17-18
http://www.brightcopy.net/allen/pilotsguide/16-17
http://www.brightcopy.net/allen/pilotsguide/15-16
http://www.nxtbook.com/allen/pilotsguide/2014-2015
http://www.nxtbook.com/allen/pilotsguide/2013-2014
http://www.nxtbook.com/allen/pilotsguide/2012-2013
http://www.nxtbook.com/allen/pilotsguide/2011-2012
http://www.nxtbookMEDIA.com