Sennheiser HMEC 461 Manuale utente

HMEC 46-1

Instructions for use

Safety instructions

• Please read this instruction manual carefully and com-

pletely before using the headset.

• Make this instruction manual easily accessible to all

users at all times.

• Always include this instruction manual when passing

the headset on to third parties.

• During flight operation, do not use the headset for

telephone calls.

• 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 air-

craft, 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.

• The headset is capable of producing sound pres-

sure 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.

• Only replace those parts of the headset whose

replacement is described in this instruction 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 aircraft cockpits 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.

The HMEC 46-1 headset

The HMEC 46-1 headset with NoiseGard™ active noise com-

pensation features dynamic, open headphones. The noise-

compensating condenser microphone ensures excellent

speech transmission even in noisy environments. Designed

for use in aircraft cockpits.

Features

• NoiseGard™ active noise compensation reduces

ambient noise by at least 15 dB – consequently the

radio volume can be decreased

• Extremely lightweight

• Extremely comfortable to wear due to the patented

two-piece automatic headband and soft ear pads

• Peak level protection 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 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 bat-

teries/rechargeable batteries

• “Auto shut-off” extends battery life

• ETSO (C57a/C58a)/TSO (C139) approval

Delivery includes

•HMEC46-1headset

•Cableclip

• Wind and pop screen

•Instructionmanual

•Carrybag

•EASAForm1

Operation

Turning the microphone boom

The microphone boom can be rotated. This allows the

headset to be worn with the microphone boom posi-

tioned on either the left or right-hand side of the head.

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 dis-

tance of approx. 2 cm between microphone and mouth.

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 corresponding sockets 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 environmental

sounds and warning alarms.

CAUTION!

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.

–

The operating controls of the HMEC 46-1

Operating control I

Volume controls

LED

NoiseGard™ ON/OFF

switch

Mono/stereo switch

BOOM switch L/R

3.5 mm jack socket

Battery compartment

2.5 mm jack socket

Cable with

operating

control I

Operating element



-B-CP x x x

-B-K x x x

-B-KP x x x

-BV-CP x x x x x

-BV-K xxxxxxxx

-BV-KP xxxxxxxx

-V-CP x x x x

-V-KP xxxxx

-V-KX xxxxx

-V-RP xxxxx





























Operating control II

LED

NoiseGard™ ON/OFF

switch

Cable with

operating

control II

Operating element



-CP x x

-KP x x

-NP x x





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