Sennheiser HME 46 User manual

HME 46
Instructions for use
HD 46

1
Safety instructions
yPlease read these instructions carefully and
completely before using the headset.
yMake these instructions easily accessible to all users
at all times.
yAlways include these instructions when passing the
headset on to third parties.
yThe 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!
yNever repair or attempt to repair a defective headset
yourself. Contact your Sennheiser agent or the
Sennheiser Service Department.
yOnly 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.
yProtect the headset from wetness. Use only a slightly
damp cloth to clean the headset. For information on
how to clean the headset, contact your Sennheiser
agent.

2
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.

3
HD 46 / HME 46
The HD 46 headphones and the HME 46 headset feature
dynamic, open headphones. The noise-compensating
condenser microphone ensures excellent speech trans-
mission even in noisy environments. Designed for use in
aircraft cockpits.
Features
yExtremely lightweight
yExtremely comfortable to wear due to the patented
two-piece automatic headband and soft ear pads
yPeak level protection safeguards you from volume
peaks above 110 dB
y“Flip-away” headphone allows single-sided listening
yFlexible microphone boom, can be worn on either left
or right-hand side (headsets only)
yNoise-compensating condenser microphone ensures
excellent speech transmission (headsets only)
ySingle-sided cable, easy to exchange
yVolume control integrated in the cable (HME 46-V-K
only)
yETSO approval C57a/C58a
yTSO approval C139

4
Delivery includes
yHD 46 headphones / HME 46 headset
yCable clip
yWind and pop screen (except HD 46-K1)
yInstructions for use
yCarry bag
yEASA Form 1
Operation
Turning the microphone boom (except HD 46)
The microphone boom can be rotated. This allows the
headset to be worn withthe microphone boom positioned
on either the left or right-hand side of the head.

5
Putting on the headset
When putting on the headset, the patented two-piece
headband adjusts automatically.
Positioning the microphone (except HD 46)
Bend the flexible microphone boom so that the micro-
phone is placed at the corner of the mouth. Maintain a
distance of approx. 2 cm between microphone and mouth.

6
Flipping away one earcup
The headset features a “flip-away” earcup for single-
sided listening.
Adjusting the volume directly on the audio system
Connect the headset to thecorrespondingsockets of your
audio system. Adjust the volume directly on the audio
system.
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.
CAUTION!

7
Adjusting the volume via the slide volume controls
(HME 46-V-K only)
The two slide volume controls and allow you to
adjust the volume for the left and right channel
separately.
Changing the left and right audio channel
(HME 46-V-K only)
The position “R” or “L” of the BOOM switch 
corresponds to the position of the microphone on the left
or right side of the mouth. When the microphone boom is
rotated to permit left or right side microphone
orientation, the BOOM switch allows you to correctly
assign the audio channels (L/R) to the appropriate
headphone sides. This enables the correct orientation of
the volume controls and any audio signals. To move the
BOOM switch, use a pointed tool.




8
Adjusting the microphone sensitivity
The microphone sensitivity has been factory pre-set to
80 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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