Sennheiser HMD 46 User manual

HME 46
Air Traffic Control
Instructions for use
HMD 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). Inmany 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 humidity. 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 within the operating conditions as
described in these instructions.
Improper use
Improper use means use of the headset other than as de-
scribed in these instructions or use under operating con-
ditions different from those described in these instruc-
tions.

3
HMD 46 / HME 46
The HMD 46 / HME 46 headset features dynamic, open
headphones. The noise-compensating microphone
ensures excellent speech transmission even in noisy
environments. Designed for air traffic control, intercom
systems and other communication purposes.
Features
yExtremely lightweight
yExtremely comfortable to wear due to the patented
two-piece automatic headband and soft ear pads
yActiveGard™ safeguards you from the effects of an
acoustic burst (except HMD 46-31 and HME 46-31)
y“Flip-away” headphone allows single-sided listening
yFlexible microphone boom, can be worn on either left
or right-hand side
yNoise-compensating microphone ensures excellent
speech transmission
ySingle-sided cable, easy to exchange
yPTT button integrated in the cable (see “Product vari-
ants” on page 10)

4
Delivery includes
yHMD 46 / HME 46 headset
yCable clip
yWind and pop screen
yInstructions for use
Operation
Turning the microphone boom
The microphone boom can be rotated. This allows the
headset to beworn with themicrophone 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
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 the correspondingsockets 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 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.
+
–

8
Care and maintenance
Cleaning the headset
Use a soft, slightly damp cloth to clean the headset from
time to time. If the headset is very dirty, use a cloth
dampened with mild, soapy water.
Replacing the earpads
For reasons of hygiene, the black earpads should be
replaced from time to time. Grasp the edge of the foam
earpad behind the earcup as shown and peel it up and
away from the earcup. Slide the new earpad onto the
earcup. Repeat for the other earcup.
Danger of short-circuit due to the ingress of
water!
Water entering the housing of the headset
can cause a short-circuit and damage the
electronics.
Use only a slightly damp cloth to clean the
headset. Do not use any solvents or cleansing
agents.
CAUTION!