Sennheiser HMEC 46 User Manual
Bedienungsanleitung
Instructions for use
Notice d’emploi
Istruzioni per l’uso
Instrucciones para el uso
Gebruiksaanwijzing
HMEC 46
Safety instructions
y Please read these instructions carefully and
completely before using the headset.
y Make these instructions easily accessible to all users
at all times.
y Always include these instructions when passing the
headset on to third parties.
y During flight operation, do not use the headset for
telephone calls.
y With the NoiseGard™ 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 NoiseGard™ 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.
y 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!
y Never repair or attempt to repair a defective headset
yourself. Contact your Sennheiser agent or the
Sennheiser Service Department.
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y 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.
y 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 these instructions especially the chapter
“Safety instructions”.
• use of the headset in jet aircraft and within the
operating conditions as described in these
instructions.
Improper use
Improper use means use of the headset other than as
described in these instructions or use under operating
conditions different from those described in these
instructions.
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The HMEC 46 headset
The HMEC 46 headset with NoiseGard™ active noise compensation features dynamic, open headphones. The
noise-compensating condenser microphone ensures excellent speech transmission even in noisy environments.
Designed for use in aircraft cockpits.
Features
y NoiseGard™ active noise compensation reduces ambi-
ent noise by approx. 10 dB – consequently the radio
volume can be decreased
y Extremely lightweight
y Extremely comfortable to wear due to the patented
two-piece automatic headband and soft ear pads
y Peak level protection safeguards you from volume
peaks above 110 dB
y “Flip-away” headphone allows single-sided listening
y Flexible microphone boom, can be worn on either left
or right-hand side
y Noise-compensating condenser microphone ensures
excellent speech transmission
y Single-sided cable, easy to replace
y With NoiseGard™ switched off, the headset can be
used as a conventional headset
y Power supply for NoiseGard™ from aircraft DC power
supply system (on suitably equipped aircraft) or
batteries/rechargeable batteries
y “Auto shut-off” extends battery life
y ETSO/TSO approval C57a/C58a
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Delivery includes
y HMEC 46 headset
y Cable clip
y Wind and pop screen
y Instructions for use
y Carry bag
y EASA Form 1
Operation
Turning the microphone boom
The microphone boom can be rotated. This allows the
headset to be worn with the microphone boom positioned
on either the left or right-hand side of the head.
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Putting on the headset
When putting on the headset, the patented two-piece
headband adjusts automatically.
Positioning the microphone
Bend the flexible microphone boom so that the microphone is placed at the corner of the mouth. Maintain a
distance of approx. 2 cm between microphone and mouth.
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Flipping away one earcup
The headset features a “flip-away” earcup for singlesided listening.
Adjusting the volume directly on the intercom
Connect the headset to the corresponding sockets of your
intercom. Adjust the volume directly on the intercom.
CAUTION!
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Hearing damage due to high volumes!
This headset is capable of producing high
sound pressure levels. Higher volumes or longer durations can damage your hearing!
Set the volume to a medium level. Make sure
that you can hear critical sounds such as warning alarms.
Adjusting the microphone sensitivity
The microphone sensitivity has been factory pre-set to
40 mV/Pa as per RTCA DO-214. You can change the
microphone sensitivity by turning a small screwdriver in
the direction of the arrow.
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