Sennheiser HME 110 User Manual 2

HME 110

Headset

Instruction manual

Important safety information

왘 Please read this instruction manual carefully and

completely before using the product.

왘 Always include this instruction manual when passing the

product on to third parties.

왘 This instruction manual is also available on the Internet at

www.sennheiser-aviation.com or www.sennheiser.com.

Preventing health problems and accidents

왘 Always 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.

왘 Keep the product, accessory and packaging parts out of

reach of children who could swallow smaller pieces.

왘 When using a headset, typical aircraft sounds (for

example, those from engines, propellers, warning alarms,
etc.) may sound different to you. Before operating any
aircraft, make sure that, while wearing the headset, 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.

왘 If during flight operation you, as the pilot, operate your

connected device using the headset, this can limit your

HME 110 | 1

Important safety information

attention. During flight operation, do not use the headset
for making phone calls or listening to music.

왘 The 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

왘 Always keep the product dry and do not expose it to

extreme temperatures (hairdryer, heater, extended
exposure to sunlight, etc.) to avoid corrosion or
deformation.

왘 Only clean the product with a soft, dry cloth.
왘 Never repair or attempt to repair a defective product

yourself. Contact your Sennheiser partner or the
Sennheiser Service Department.

왘 Only replace parts of the product whose replacement is

described in this instruction manual. All other parts of the
product must be replaced by your Sennheiser partner.

2 | HME 110

Important safety information

Intended use of the headset

Intended use of the product includes

• having read and understood this instruction manual,
especially the chapter “Important safety information” on
page

1,

• using the headset in helicopters, propeller and turboprop
aircraft and within the operating conditions as 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.

HME 110 | 3

HME 110 headset

HME 110 headset

The HME 110 pilot headset is characterized by the following
features:

• Passive headset with excellent noise attenuation

• Excellent comfort due to very low weight, soft ear pads
and padded headband

• Foldable headband for easy and space-saving transport

• Clear communications due to BKE 45-1 condenser
microphone with adjustable sensitivity

• Microphone can be easily positioned and worn on either
left or right side due to flexible microphone boom with
quick-fixing device

• Best possible freedom of movement due to unilateral
connection cable

• Optimum radio reception due to headphone system with a
wide frequency response

• Integrated volume control

• Adaption to the aircraft audio system via mono/stereo
switch

• Made in Germany, 10-year warranty

4 | HME 110

Delivery includes

Delivery includes

1 HME 110 headset
1 wind screen for microphone
1 cable clip
1 instruction manual

HME 110 | 5

Putting the HME 110 in operation

2

1

Putting the HME 110 in
operation

Connecting the headset

왘 Connect the two jack plugs of the

headset to the corresponding jack
sockets of your audio system.

Jack plug Jack socket of the audio system

5.25 mm jack plug 1
(PJ-068 equivalent)

¼” (6.35 mm) jack plug 2 Headphone output

Adjusting the headband

For good noise attenuation and best possible comfort, the
headset has to be adjusted to properly fit your head. To do
so, you can adjust the headband.

Microphone input

CAUTION!

Damage to the product due to sque

When adjusting the headband, the co
headphones can be squeezed and damaged.

왘 Make sure not to squeeze the headphones connection

cable whe

6 | HME 110

n adjusting the headband.

ezing of cables!

nnection cable for the

Putting the HME 110 in operation

왘 Wear the headset so that the headband runs over the top

of your head.

왘 Adjust the length of the headband so that

– your ears are completely inside the ear pads,
– you feel even, gentle pressure around your ears,
– a snug fit of the headband on the head is ensured.

왘 Final adjustment is best made in a noisy environment.

HME 110 | 7

Putting the HME 110 in operation

Positioning the microphone

To position the microphone boom on either the right or left­hand side of the mouth:

왘 Loosen the quick-fixing device.
왘 Rotate the microphone boom by 180°.
왘 Tighten the quick-fixing device.

Positioning the microphone towards the corner of the
mouth

왘 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.

8 | HME 110

Using the HME 110

Using the HME 110

Switching between mono and stereo operation

In general, you’ll receive a mono sound source so that the
mono/stereo switch can remain set to “MONO” (factory
setting).

To set the headset to stereo operation:

왘 Remove the ear pad (see “Replacing the ear pads” on

page 14) from the ear cup with the microphone boom
attached.

왘 Set the mono/stereo switch to “STEREO”.

HME 110 | 9

Using the HME 110

+

–

Adjusting the volume

WARNING!

Hearing damage due to high volume levels!

Listening at high volume levels for long periods

ead to permanent hearing defects.

can l

왘 Before putting the headset on, set the

me to a low level.

volu

왘 Do not cont

volumes.

왘 Adjust the volume to a medium level. Make sure that you

can

hear critical sounds such as warning alarms.

inuously expose yourself to high

10 | HME 110

Using the HME 110

BKE 45–1

MADE IN GERMANY

P/N 045–305–097
TSO - C58a

Mic Gain Adjustment

+

–

Adjusting the microphone gain “Mic Gain”

According to JTSO approval C58a, the microphone output
voltage is factory preset to 400
voltage is too high or too low for your audio system, it can be
readjusted on the microphone.

왘 Use a small slotted screwdriver and turn the “Mic Gain

Adjustment” screw (see diagram) until you have reached
the desired setting.

mV. If the microphone output

HME 110 | 11

Using the HME 110

Transporting the headset

For space-saving transportation, you can fold the headset:

왘 Tuck the ear cups between the headband.

To unfold the headset:

왘 Grasp both ear cups and pull them up and away from the

headband.

12 | HME 110

Cleaning and maintaining the HME 110

Cleaning and maintaining the
HME 110

Cleaning the headset

CAUTION!

Liquids can damage the electronics of the product!

Liquids entering the housing o
short-circuit and damage the electronics.

왘 Keep all liquids far away from the product.
왘 Do not use any solvents or cleansing agents.

왘 Use a soft, dry cloth to clean the product from time to

ti

me.

Replacing the wind screen

If the wind screen for the microphone shows signs of wear
such as tears or holes, replace the wind screen. The new wind
screen must totally enclose the microphone.

f the product can cause a

HME 110 | 13

Cleaning and maintaining the HME 110

Replacing the ear pads

If the ear pads are damaged or worn out, replace them as
follows:

왘 Grasp the edge of the old ear pads and peel them up and

away from the ear cups.

왘 Press the new ear pads onto the ear cups.

14 | HME 110

Accessories and spare parts

Accessories and spare parts

The following accessories and spare parts are available from
your Sennheiser partner.
country, search at
www.sennheiser.com.

• Wind screen for BKE 45-1 condenser microphone

•HZC 08 cable clip

• Carry and storage bag

• GOP gel ear pads

• LUXURY ear pads

To find a Sennheiser partner in your

www.sennheiser-aviation.com or

HME 110 | 15

If a problem occurs ...

If a problem occurs ...

Problem

Communication

Communication

s in one ear only

s in one ear only

Very low
volume
communication

Reduced
intelligibility

Microphone
output voltage
too high or too
low

Possible cause Solution

You are using a stereo
audio system but the
headset is set to mono
operation.

You are receiving a
mono source but the
headset is set to stereo
operation.

The volume is set too
low.

The headphone
connection has been
pulled out.

The microphone
connection has been
pulled out.

The microphone gain
“Mic Gain” needs to be
readjusted.

Set the mono/stereo
switch to “STEREO”
(see page 9

Set the mono/stereo
switch to “MONO”
(see page 9

Adjust the volume
setting of your
headset 
(see page 10

Check to see if the
headphone jack plug
is correctly connected.

Check to see if the
microphone jack plug
is correctly connected.

Adjust the
microphone gain 
“Mic Gain” until you
have reac
desired setting 
(see page 11).

).

).

).

hed the

16 | HME 110

If a problem occurs ...

If a problem occurs that is not listed in the above table or if
the problem cannot be solved with the proposed solutions,
please contact your local Sennheiser partner for assistance.

To find a Sennheiser partner in your country, search at
www.sennheiser-aviation.com or www.sennheiser.com.

HME 110 | 17

Specifications

Specifications

Headset

Transducer principle dynamic, closed
Ear coupling circum-aural
Frequency response 45 – 15,000 Hz
Nominal impedance

Noise attenuation > 10 to 40 dB
Contact pressure approx. 10 N

mono: 150
stereo: 300 

Microphone incl. preamplifier

Transducer principle BKE 45-1 condenser mic capsule, 

noise-compensating
Frequency response 300 – 5,000 Hz
Max. SPL 120 dB
Terminating

nce

impeda
Output voltage 400 mV ± 3dB at 114 dB

Supply voltage typ. 16 V

150 

(as per RTCA/DO 214)

approx. 8 to 25 mA as per RTCA/DO 214)



(8 to 16 VDC 

DC

18 | HME 110

Specifications

12 3

General data

Connection cable approx. 1,5 m,

unilateral
Weight without cable approx. 350 g
Connectors ¼” (6.35 mm) jack plug for headphones,

5.25 mm jack plug (PJ-068 equivalent)

for microphone
Controls mono/stereo switch

headphone volume control
Temperature range

operation: 15°C to 55°C

storage:

55°C to 55°C

Connector assignment

5.25 mm jack plug (PJ-068 equivalent)

1 Not assigned

12 3

¼” (6.35 mm) jack plug

2 Micropho
3 Microphone

1 Audio High left
2 Au
3 Au

ne High

Low

dio High right
dio Low

HME 110 | 19

Manufacturer Declarations

Manufacturer Declarations

Warranty

Sennheiser electronic GmbH & Co. KG gives a warranty of 10
years on thi

For the current warranty conditions, please visit our web site

www.sennheiser-aviation.com or www.sennheiser.com or

at
contact your Sennheiser partner.

In compliance with the following requirements

• RoHS Directive (2002/95/EC)

• WEEE Directive (2002/96/EC)

CE Declaration of Conformity

•

• EMC Directive (2004/108/EC)
The declaration is available at www.sennheiser.com.

WEEE Declaration

s product.

Please dispose of this product by taking it to your local
collection point or recycling centre for
This will help to protect the environment in which we
all live.

20 | HME 110

such equipment.

Name plates

Sennheiser electronic GmbH & Co. KG

Am Labor 1, 30900 Wedemark, Germany
www.sennheiser.com

Publ. 01/12, 547018/A01