Sennheiser HMEC 26-2 User manual

Instruction manual
HMEC 26-2

Important safety information
HMEC 26-2 | 1
Important safety information
왘Please read this instruction manual carefully and
completely before using the product.
왘Always include this instruction manual when passing the
product on to third parties.
왘This instruction manual is also available on the Internet at
www.sennheiser-aviation.com or www.sennheiser.com.
Preventing health problems and accidents
왘Always maintain a distance of at least 3.94“ (10 cm)
between the ear cups and the cardiac pacemaker or
implanted defibrillator since the product generates
permanent magnetic fields.
왘Keep product, accessory and packaging parts out of reach
of children who could swallow smaller pieces.
왘Switch the product off after use to conserve battery
power. Remove the rechargeable batteries if the product
will not be used for extended periods of time.
왘If during flight operation you, as the pilot, operate your
connected device using the headset, this can limit your
attention. During flight operation, do not use the headset
for making phone calls or listening to music.
왘With the NoiseGardTM 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

Important safety information
2 | HMEC 26-2
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.
왘The product is capable of producing sound pressure
exceeding 85 dB(A). In many countries 85 dB(A) is the
maximum legally permissible level for continuous noise
exposure during the working day. Do not listen at high
volume levels for long periods of time to prevent hearing
damage.
Preventing damage to the product and dysfunctions
왘Always keep the product dry and do not expose it to
extreme temperatures (hairdryer, heater, extended
exposure to sunlight, etc.) to avoid corrosion or
deformation.
왘Only clean the product with a soft, dry cloth.
왘Never repair or attempt to repair a defective product
yourself. Contact your Sennheiser partner or the
Sennheiser Service Department.
왘Only replace parts of the product whose replacement is
described in this manual. All other parts of the product
must be replaced by your Sennheiser partner.

Important safety information
HMEC 26-2 | 3
Intended use
Intended use of the product includes
• having read and understood this instruction manual,
especially the chapter “Important safety information” on
page 1,
• using the product within the operating conditions and
limitations described in this instruction manual.
“Improper use” means using the product other than as
described in this instruction manual, or under operating
conditions which differ from those described herein.

The HMEC 26-2 headset
4 | HMEC 26-2
The HMEC 26-2 headset
The HMEC 26-2 headset with NoiseGard™ professional 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
•NoiseGard™activenoisecompensation 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 ear pads
• 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

Package contents
HMEC 26-2 | 5
• With NoiseGard™ switched off, the headset can be used
as a conventional headset
• Power supply for NoiseGard™ from aircraft DC power
supply system (on suitably equipped aircraft) or
batteries/rechargeable batteries
• “Auto shut-off” extends battery life
• TalkThrough function (HMEC 26-2-T only)
• ETSO approval C139
• 5 year warranty
Package contents
1HMEC26-2headset
1 cable clip
1 wind and pop screen
1 pair of hygiene pads
1 audio cable with 2.5 mm jack plugs*
1 audio cable with 3.5 mm jack plugs*
1beltclip*
1 carry bag*
1 instruction manual
1 EASA Form 1
* not supplied with all product variants (see page 23)

Operation
6 | HMEC 26-2
Operation
Putting on the headset
When putting on the headset, the patented two-piece
headband adjusts automatically.
Flipping away one earcup
The headset features a “flip-away” earcup for single-sided
listening.

Operation
HMEC 26-2 | 7
Positioning the microphone
Bend the flexible microphone boom so that the microphone is
placed at the corner of the mouth. Maintain a distance of
2cm between microphone and mouth. Always use the
supplied wind and pop screen.
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.

Operation
8 | HMEC 26-2
Adjusting the volume directly on the audio system
Connect the headset to the corresponding sockets of your
audio system. Adjust the volume directly on the audio
system.
Adjusting the microphone sensitivity
Turn a small screwdriver in the direction of the arrow to
change the microphone sensitivity.
CAUTION
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!
왘Set the volume to a medium level. Make sure that
you can hear critical sounds such as warning
alarms.
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The control units of the HMEC 26-2
HMEC 26-2 | 9
The control units of the HMEC 26-2
Control unit I
1Volume controls
2LED
3NoiseGard™ ON/OFF switch
4Mono/stereo switch /
5BOOM switch L/R
63.5 mm jack socket
7Battery compartment
82.5 mm jack socket
Headset with
control unit I
Operating element
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Cable -BV-K-2
Cable -B-K-2
Cable -B-KP-2
Cable -B-CP-2
Cable -V-KX-2