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Instruction manual
HMEC 26


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1
Safety instructions
Please
read
these
instructions
carefully
and
completely before using the headset.
Make these instructions easily accessible to all users
at all times.
Always include these instructions when passing the
headset on to third parties.
During flight operation, do not use the headset for
telephone calls.
With the NoiseGardTM active noise compensation
switched on, typical aircraft sounds (for example,
those from engines, propellers, warning alarms, etc.)
may sound different to you. Before operating any
aircraft, make sure that, with NoiseGardTM switched
on, you can hear and recognize these sounds. Set the
volume to safe levels that do not interfere with your
ability to hear informational sounds and warning
alarms.
The headset is capable of producing sound pressure
levels exceeding 85 dB(A). In many countries 85 dB(A)
is
the
maximum
legally
permissible
level
for
continuous noise exposure during the working day.
Exposure to sounds of higher volume levels or for
longer durations can permanently damage your
hearing!
Never repair or attempt to repair a defective headset
yourself. Contact your Sennheiser agent or the
Sennheiser Service Department.


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2
Only replace those parts of the headset whose
replacement is described in this manual. All other
parts of the headset must be replaced by your
Sennheiser agent.
Protect the headset from humidity. Use only a slightly
damp cloth to clean the headset. For information on
how to clean the headset, contact your Sennheiser
agent.
Intended use of the headset
Intended use includes:
·
having read this instruction manual especially the
chapter "Safety instructions".
·
using the headset in jet aircraft and within the
operating conditions as described in this instruction
manual.
Improper use
Improper use means using the headset other than as
described in this instruction manual, or under operating
conditions which differ from those described herein.


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3
The HMEC 26 headset
The HMEC 26 headset with NoiseGardTM active noise
compensation features dynamic, closed headphones. The
noise-compensating
condenser
microphone
ensures
excellent
speech
transmission
even
in
noisy
environments. Designed for use in aircraft cockpits.
Features
NoiseGardTM active noise compensation reduces
ambient noise by up to 18 dB ­ consequently the radio
volume can be decreased
Lightweight
Extremely comfortable to wear due to the patented
two-piece automatic headband and soft earpads
Peak level protection (cannot be switched off)
safeguards you from volume peaks above 110 dB
"Flip-away" headphone allows single-sided listening
Flexible microphone boom, can be worn on either left
or right-hand side
Noise-compensating condenser microphone ensures
excellent speech transmission
Single-sided cable, easy to replace
With NoiseGardTM switched off, the headset can be
used as a conventional headset
Power supply for NoiseGardTM from aircraft DC power
supply system (on suitably equipped aircraft) or
batteries/rechargeable batteries
"Auto shut-off" extends battery life
TalkThrough function (HMEC 26-T only)