INTERCOM - SERVICE INTERCOM
Peltor Service Intercom –
By far the simplest way of hooking up
to a temporary Intercom system.
1
INTERCOM - SERVICE INTERCOM
The best value-for-money portable intercom
on the market featuring full duplex for noisy
environments – Peltor Service Intercom.
Easy to install – and
user-friendly too
The Peltor Service Intercom is an advanced yet easy-to-use mobile intercom
system. Many years of experience in the
aviation sector, defence operations and
heavy industry have given us invaluable knowhow about communication in
noisy conditions and honed our skills
and expertise in noise reduction and
advanced electronics. At the same time,
working closely with end-users has made
us highly aware of the importance of
simplicity and operational reliability.
The result is the most reliable and
user-friendly service intercom on the
market.
accordingly chosen to work with the
simplest possible connection system, a
perfectly standard 2-strand cable. No
fixed power source is needed for this,
since each headset is equipped with its
own power supply.
What this means is that in certain
conditions, it is even possible to utilise
an already-existing wiring network to
set up the intercom system.
Electronics and power source
integrated in the headset – no
power needed in the network.
Damp-proof junction box for
permanent installation
Simple, cheap installation – with
a standard twin cable
The prime use for service intercoms is
for temporary communications systems,
for example when loading ships, service
in underground tunnels etc. Peltor have
provided over a distance of several
kilometres. The junction box is built
to withstand rain and other moistureexposed conditions.
For use of the Peltor Service Intercom
in more permanent environments,
each working station is equipped with
a junction box to which one or more
headsets can be connected. The junction box does not require any power
source of its own. Owing to the design
of the system, communications can be
2
The Peltor Service Intercom relies on
simple wiring. The communications
unit is integrated into each headset,
and each headset is powered by a 9 V
battery which provides about 50 hours
of operation.
With this setup, no separate power
supply is needed.
Duplex and VOX
In order to guarantee the user maximum benefit from the Peltor Service
INTERCOM - SERVICE INTERCOM
Intercom system, Peltor have developed
a full duplex communication system
with adjustable voice-activated VOX.
With this design, the microphone in
the headset is switched off when the
user is not speaking, but is activated
instantaneously when the user begins
talking. This advanced technology saves
battery power and it also allows the user
to concentrate fully on the job at hand,
since no unnecessary noise penetrates
via the intercom system.
The VOX function is adjustable
to 4 sensitivity settings, which can
be selected to suit the profile of the
background interference. Each stage
increases noise tolerance by about 6
dB. In addition, there is a separate position for use together with the speech
button.
High capacity – up to 25 users
The Peltor Service Intercom offers
high capacity. Up to 25 users can link up
to each system, and a wide range of connection and extension cables guarantees
the Peltor Service Intercom maximum
flexibility and expansion potential.
Perfect for temporary work-sites
With Peltor’s method of using a
standard 2-strand cable without a fixed
current source, the result is an Intercom
with an extremely wide operational e
ea. Users are no longer restricted to a
fixed area – instead, the system is designed primarily for temporary work-sites
such as servicing tunnels, sports events
etc.
Extremely high quality
With customers in the aviation and
defence industries, there simply is no
room for compromising on quality.
That approach lies behind the design
of the components used in the Peltor
Service Intercom.
The headset equipment, for example, is based on Peltor’s renowned
H7 hearing protector, which features
an optimum combination of noise attenuation and comfort.
Bands made of special spring steel
in combination with foam/fluid-filled
cups offer perfect fit and comfort, even
in long-term use.
The electronics we use conform to
the same stringent standards applied for
NATO communications equipment.
Even the battery housing is designed
to ensure maximum operational reliability.
Noise-compensated microphone
100
dB
90
80
70
60
50
40
30
20
125
250
500
1000 2000 4000 8000
Hz
A microphone used in noisy environments has the task of reproducing
speech with high quality while at the
same time dampening ambient noise
to the greatest possible extent.
Peltor have solved this problem with
the help of a microphone which offers
the best noise suppression across the
entire speech frequency range, up to
25 dB. Furthermore, the microphone
is equipped with a special filter which
eliminates histõng and breathing
sounds.
This approach offers the best speech
reproduction, even at noise levels above
115 dB.
In order to enjoy the full benefit of
noise compensation, the microphone
must be positioned close to the mouth,
about 3–5 mm from the lips.
3
Frequency-compensated sound reproduction for best sound quality
dB
100
80
60
40
20
125
500
2000
8000
16000Hz
In order to shut out harmful noise
and yet at the same time provide good
sound reproduction in speech, it is vital that each and every component is
well-thought-out and integrated with
the others. Peltor have developed a
sound reproduction system which offers the very best speech reproduction
in noisy conditions. The secret lies in
the fact that sound reproduction in the
hearing prqÿector cups is frequencycompensated on the basis of the hearing protector’s attenuation ability. As
a result, the wearer perceives incoming
speech as “normal”, and does not have
to suffer the masking effect of residual
sound inside the cup. Furthermore, we
have selected components and a production technique which minimises
distortion. The result is unsurpassed
speech clarity in noisy conditions.
In order to further ensure that incoming speech can be heard distinctly,
the loudspeakers are linked in parallel.
So if there is break in one loudspeaker,
the other will continue functioning.
Support clamp
Safety is further enhanced through the
provision of a support clamp for the cable
leading to the Peltor headset. It helps keep
the cable out of the way, and it also acts as
an additional security clamp to keep the
wearer’s headset firmly in place so that it
INTERCOM - SERVICE INTERCOM
Examples of application areas for
the Peltor Service Intercom.
FINISH
..
........................
.... ......
4
INTERCOM - SERVICE INTERCOM
Mobile installation.
2 USERS
3 USERS
MULTI-STATIONS
Fixed installation.
5
INTERCOM - SERVICE INTERCOM
The Peltor Service Intercom product range.
Headset – headband
MT72H7A-40
Headset designed for the Peltor Service Intercom. Compact microphone connector with “Quick Positioning” feature allowing quick and precise switch from standby to operational position. Full duplex,
built-in adjustable VOX (switches speech control on/off, blocks unwanted noise and saves the battery).
Separate socket for speech button (TK51). Includes connection cable made of temperature-resistance
polyurethane, coil cable 0.6–1.2 m and support clamp. Powered by one 9 V battery, operational duration approx. 50 hours.
Weight 365 g.
Can be voltage-fed via FB20.
Headset – neckband
Headset – helmet
attachment
MT72H7B-40
Corresponds to headset
MT72H7A-40, but equipped
with neckband for independent use together with
headgear.
Weight 350 g.
MT72H7P3E-40
Corresponds to headset
MT72H7A-40, but with
attachment for Peltor protective helmet. Attachments
for other makes of helmet.
Weight 395 g.
Junction box for fixed installation
FB21
Connected to the main cable at each work-site. With connector for linking one or more headsets. Rain
and moisture-proof. Each system can handle up to 25 users over a distance of several kilometres.
Junction box
FB20
For central power supply. Junction box FB20 eliminates the need for a 9 V battery in each headset.
Input signal level/usage duration
Max. permitted audio signal in relation to usage duration.
In order to avoid harmful loudspeaker levels, the stated input signals should not be exceeded (Speech
Signal Mean Level).
The line level at normal speech mean level and correct microphone usage is 0.4 V for the Peltor Service Intercom. The loudspeaker level for speech is measured at 77 dB(A) equivalent noise level at 10%
speech duration, as per the requirements in the PPE directive.
Hours/day
8
6
4
2
0
x
2x
4x
8x
16x
Spare parts/Hygiene
Hygiene kit
Kit consisting of two cups and two cushions.
Clean
Disposable protector for the headset cups.
Mike Protector
Hygienic disposable protector for microphones.
Damp-proof and windproof.
Attenuation ratings
The attenuation ratings for
the Peltor Service Intercom
are tested and approved
according to PPE directive
89/686 EEC and applicable
parts of European standard
EN 352-1:1993.
Certificate issued by FIOH,
Laajaniityntie 1, FIN-01620,
Vantaa, Finland. ID#0403.
6
MT72H7A-40, MT72H7B-40
Frequency
125
250
500
1000
2000
4000
8000
Mean att.
17.9
25.1
29.5
38.2
32.7
37.8
40.1
Std. dev.
4.0
2.7
3.2
2.9
3.6
4.0
3.8
APV
13.9
22.4
26.3
35.3
29.1
33.8
36.3
H M L
SNR
32 dB 29 dB 22 dB
31
MT72H7P3E-40
Frequency
125
250
500
1000
2000
4000
8000
Mean att.
15.2
21.9
27.2
38.0
31.0
33.3
37.9
Std. dev.
3.9
3.7
2.5
3.6
3.7
3.0
2.6
APV
11.3
18.2
24.7
34.4
27.3
30.3
35.3
H M L
SNR
30 dB 27 dB 19 dB 29
INTERCOM - SERVICE INTERCOM
Spiral cord for direct hook-up
Cables
Cable for mobile intercom network
Intended for expanding a temporary intercom network.
With connectors/splicing links at each end.
Made of wear-resistant PVC.
Intended for connecting the headset to the junction box or mobile
network. Offers freedom of movement up to 4 m. Spiral.
Made of temperature and oil-resistant polyurethane.
10 m, FL3M
0,4 - 2 m, FL3K
25 m, FL3N
0,7 - 4 m, FL3L
Male-female-adapter
50 m, FL3P
0,7 - 4 m, FL3R
100 m, FL3Q
Special cables
Speech button (Push To Talk). Connected to the headset.
Including support clamp.
Branch cable for connecting additional headsets.
0,7 m, TK51
Male-female-adapter.
0,3 +0,3 m, FL4D
Attachments for Peltor Service Intercom headset on other makes of helmet.
The Peltor headset can also be used in combination with other makes of helmet (slotted, snap-in or screw-on attachment). Choose the right helmet attachment from the table below. All the helmet attachments (apart from P3A) feature an integrated attachment for Peltor visors.
NB! The following list of helmet attachments replaces ..P3E in the order number.
Example: MT72H7P3E-40 with attachment for the Schubert WPL 80 helmet will be MT72H7P3EA-40.
SLOT ATTACHMENT
SNAP-IN ATTACHMENT
(helmets equipped with slots for
fastening accessories)
(helmets with drop-edge)
Attachment P3E, suits helmet:
A-safe modell A-79
American Optical BX 21
Apex sentry III
Bullard
Cam-Hi
Champion ST 2
Chubb Panorama
Eastern
Evert Larsson Robust
Evert Larsson Balance
Jackson
JSP MK II A
Las Lockweiler
MSA Super V-gard
MSA V-gard
North # 410
North Norsman SH 1525
Norton
Peltor
Protector Tuffmaster I
Ram-Cap
Uvex Boss
Voss INAP
Willson
Universal attachment P3B
Attachment P3EA, suits helmet:
Schubert WPL 80
Attachment P3EB, suits helmet:
Schubert WPL 82
Brennus
SCREW-ON ATTACHMENT
Attachment P3F, suits helmet:
Carolyn
Fondelec
Ordo 81
(helmets without factoryprepared attachment)
Universal attachment P3A
Attachment P3G, suits helmet:
Erin
Protector HC 71
Protector Tuffmaster II och III
Attachment P3H, suits helmet:
Thetford Centurion
7
INTERCOM - SERVICE INTERCOM
World leader in hearing protection and
communication in noisy environments.
Our goal is to improve the comfort and job satisfaction of all those who spend time in noisy environments. That is
why we have developed a comprehensive range of hearing
protectors, headsets, helmet systems, accessories and communications equipment – to enable people to work in greater
safety and security while making the workplace more enjoyable.
Our product range takes account of the diversity of people’s
perceptions regarding comfort and their different needs to
be able to hear and speak. The Peltor product range makes it
possible to tailor our components to suit the most varied needs
in noisy environments, both indoors and outdoors.
In-house development and production
Peltor products are the result of our own extensive research
allied to more than 40 years of practical experience. Our staff
are out in the field every day, gathering input from a variety
of working environments. A large proportion of our product
development is the direct result of the experiences and suggestions of users.
We also persist in maintaining full control of the entire
production chain from initial idea to delivery of the finished
product to the customer. For example, we make all the important parts ourselves, from spring-steel headset bands to
electronic components. This is our way of guaranteeing quality.
It also has the added advantage that we can quickly and simply
tailor special designs to suit individual requirements.
This is a strength which has given Peltor its world lead in
the field of hearing protection and communications for manufacturing industry, the forestry industry, shooting, aviation
and motorsport.
If you would like further information, for example about
Peltor’s training or hearing-protection care programme or the rest
of our product range, please contact us or any of our dealers.
Peltor Support
Aearo Ltd., First Avenue, Poynton, Stockport, Cheshire SK12 1FJ, England, Tel. +44 (1625) 878320, fax +44 (1625) 877348
Peltor®, Mike Protector™, Clean™ and Quick-Positioning™ are registered trademarks of Peltor AB.
©Peltor AB 1996
8
P978167