Audio transmission systems
for professional use – mobile and stationary
Induction loop systems,
radio-frequency and
infrared transmission
systems:
The technology and service
package for the professional
use of audio transmission
systems: conference and event
technology, guided tours
and seminars
2015
2
Induction loop systems
Function and use of induction loop systems.....................................4
Portable induction loop systems and components...........................6
Induction loop amplifiers for small and medium-sized rooms..........7
Induction loop amplifiers for large areas...........................................8
Low-overspill systems (LOS): Function and use.............................10
Loop amplifier systems for LOS installations..................................11
Induction loop receivers and receiver accessories........................13
General accessories for induction loop systems............................14
Infrared transmission systems
Function and use of infrared transmission systems........................16
Infrared transmission systems for medium range...........................18
Audio transmission
systems for professional
use – mobile and
stationary
High-performance infrared transmitter
with integrated modulator................................................................20
Infrared receivers............................................................................21
Accessories for infrared transmission systems...............................23
Radio-frequency transmission systems
Function and use of radio-frequency transmission systems...........26
Portable 3-channel transmission systems
and accessories..............................................................................28
Portable 32-channel transmission system
for large areas transmitter, receiver, accessories............................32
Appendix
Accessible sound in private and public facilities............................36
This information brochure illustrates
structure and extent of the AUDIOropa
program at the time of publication: see
back page.
HUMANTECHNIK GmbH reserves the
right to make technical developments
and changes to the structure and
scope of its delivery programme in
respect of the components described
here. This brochure is therefore
exclusively for information about
available systems, their accessories
and application - but is not binding
as far as orders are concerned. We
will be pleased to advise you on the
basis of the current programme status
before you place your order.
Technical solutions..........................................................................37
Comprehensive service offer from AUDIOropa...............................37
Systems based on different physical principles
and their main areas of application (table).....................................37
Keyword list.....................................................................................38
3
What is an induction loop
amplifier, connected with an audio
Planning induction loop
system?
source (hi-fi system, speaker’s
systems
Using an inductive loop system,
hearing-aid wearers can pick up
the signals emitted by electric/
alternating current to the loop.
In order to install induction loop
systems correctly, it is necessary
to take into account many different
The magnetic field inside the loop
factors – with respect to the archi-
phone or hi-fi systems) directly in
allows the listeners to move freely
tecture as well as the area in which
their hearing aids or CI systems.
in the room and pick up the audio
they are used. Some areas of use
As a result, they hear the sound
signals fed directly into their hear-
with special requirements include:
without any annoying background
ing aids.
outstanding advantage of using
induction loop systems: no special
European standards and
legislation
receivers are required. All that’s
The technical requirements for in-
needed is the hearing aid.
duction loop systems are defined in
Most modern hearing aids are now
equipped with adjustable »M«
and »T« functions. »M« stands
for microphone, i.e. hearing the
sound in the room via the integrated
microphone, and »T« (telecoil)
means that the audio signals are
transmitted inductively and directly
via a telecoil integrated in the hearing aid. Some hearing aids are also
equipped with an »MT« function,
which combines both types of
reception, microphone and telecoil
so that the listeners are able to hear
the sound in the room as well as
the inductively transmitted signals.
How does an induction loop
system work?
Alternating current creates a magnetic field in a wire/a loop. If a
second wire is introduced into this
magnetic field (here: the telecoil
in a hearing aid), a correspondingly alternating current will also be
created in it: the electrical impulses
are »induced« into the second
wire without any actual electrical
connection.
An induction loop system consists
of a loop and an amplifier. The loop,
an insulated wire, runs around the
outside of the listening area. The
4
acoustic signals converted into
electronic audio sources (micro-
noise, echo or reverberation. An
Function and
use of induction
loop systems
microphone, etc.), transmits the
the European Standard EN 60118-4
(also known as IEC 118-4). This
standard, which HUMANTECHNIK
induction loop components meet
when installed correctly, regulates
the magnetic field strength and the
frequency range of the systems.
All induction loop systems also
comply with the CE standards,
which demand the strict control
of the equipment with respect to
interference, spurious emissions
and electrical safety.
Rooms without equally rectangular or square floor plans
Strong steel reinforcement
or electromagnetic fields from
other sources
Theatres / cinemas /
lecture halls
Rooms in which the loop is
positioned far away from the
listening level
Buildings in which several
independent loops have to be
installed close to one another
without interfering with one
another.
Installation tips
Planning-Software »Loop Designer« : Developed for you
Loop position: In order to create a
With the purchase of our PROLOOP loop amplifier you receive the
uniform magnetic field, the distance
opportunity to request access our webclient-based induction loop
between the loop level to the normal
design software »Loop Designer«.
listening level should be between
approx. 1.2 and 2 metres.
With the help of »Loop Designer« you can include different materials in the room, see how much cable you need, which amount
The position and size of the
of power the amplifier must provide - and you can also create a
loop can also be determined by
simulation of the magnetic field along with its strength. Much easier
the position of the listening area
and faster than you think!
(often much smaller than the size
of the room) or the position of
Selection of the amplifier:
positioned outside the loops. The
Area used
Reception, counter: TV rooms, nursing homes, living rooms:
Conference rooms, theatres:
Very large induction loop systems: Systems with little overspill: Portable induction loop system:
distance between the loop and the
This table serves only as general orientation for selecting the amplifier.
dynamic microphone should be at
Please take advantage of our consulting services before you make your
least half the diameter of the loop.
purchase.
the microphones as well as other
technical equipment that affects
the magnetic field.
If possible, avoid using dynamic
microphones in combination with
induction loop systems. If they
cannot be avoided, they must be
Loops are generally laid around
the outside perimeter of the room.
Page/s
6/7
7
7/8
8
9
12
9
12
10
Conducting materials, such as
microphone usually produces
reinforced concrete, can increase
better results with respect to
or decrease the area covered
interference or acoustic feedback.
by the loop. The magnetic field
A microphone with a high-quality,
strength is often increased outside
insulated connection cord also gen-
the loop, while it is decreased
erally reduces magnetic feedback.
inside. This fact considerably
Reduce the area of the loop! The
connection wire to the loop must
tively transmitted to all the »coils«
be firmly twisted or closely parallel.
increases the risk of acoustic feedback. In a new building, you should
try to install an LOS system. The
LOS system makes it more difficult
Make a test installation. Always
for the current to connect with large
test the loop system to make sure
metal objects.
that it is powerful enough, that
the overspill does not cause any
problems, etc.
Adjust the height of the loop (1.2
Notes on the installation
of induction loop systems
6
Using a condenser or electret
The audio signals are then inducinside the loop.
Amplifier
LA-60 / LA-90 / LA-90 Set
LA-240 / Cross the Counter
LA-240 / PROLOOP C
PROLOOP C PROLOOP DCCplus
PROLOOP LOSplus
PROLOOP DCCplus
PROLOOP LOSplus
LOS systems
LA-90, LA-90 Set
loop system kit
Pay particular attention to metal
frames. Do not fasten the loop to
structural elements made of metal or
to similar objects.
to 2.0 m) to provide for the greatest
possible range with the smallest
amount of overspill.
5
LA-90
Induction loop kit
LA-240
Portable induction
loop systems
LA-90
Order No.: A-4209-0
»LA-90« is a compact loop system for
transmission over short distances, for
example at receptions, counters or in
sales areas.
Includes the LA-90, a table microphone, a handset and a special
handset holder insert. Ideal for
discreet consultations - also suitable for normal-hearing customers.
6
amplifier for the supply of
inductive signals in small
The induction loop system kit
contains a complete, portable induction loop system designed for
rooms or coaches
Order No.: A-4221-0
The LA-240 can supply rooms up to
Positioned between the dialogue
includes the PROLOOP C induction
approx. 50 m² with inductive audio
partners, »LA-90« receives the spo-
loop amplifier (see p. 8) as well as
signals via the connected loop. The
ken word via a built-in or optionally
two cable reels with 20 metres of
delivery includes a 37 metre long
additionally connected microphone
loop wire each and the PROLOOP
induction loop cable. In addition
(e.g. table microphone page 15 or
FSM measuring instrument incl.
to the setting options for the basic
EH1205, illustration page 7). The
DIR under-the-chin receiver (see p.
volume and sound, the digitally
integrated loop transmits the signals
13). The system is easy to use and
controlled induction loop amplifier
inductively to hearing devices, CI-
ready to go »in a flash« – ideal for
also supports volume stabilisation
systems or other inductive receivers
temporary installations.
with an automatic gain control. The
the option of connecting a headset.
LA-90 Set (Order No.: A-4211-0)
Order No.: A-4271-0
LA-240: Induction loop
rooms up to 140 m² in size. The set
(e.g. LPU-1, page 13). There is also
All what you need for a professional application of the LA-90:
Induction loop system kit
The scope of delivery does not
include a microphone; recom-
device has two audio-input sockets,
a TOSLINK input and a coaxial
connector.
Power is supplied optionally via
mended microphones: e.g. table
the mains power adapter or the
microphone (page 15) or wire-
It is connected to the 220 / 110 V
integrated rechargeable battery.
less microphones UHF101 and/or
supply via an external adapter. All
UHF401 (page 23).
settings can be made via a remote
control.
Technical data
Dimensions (HxWxD): 200 x 185 x 70 mm
Weight: 635 g (incl. rechargeable
batteries)
Microphone sensitivity: up to 60 dB
Prim. power supply: 100-240 V 50-60 Hz
Secondary: 16 V DC or via integrated
12 V 1,300 mAH rechargeable battery
Output power: max. 10 W
Technical data
Power supply: 220 - 240 V
Weight: 11 kg
Colour: Silver
Dimensions (HxWxD): 210 x 610 x 360 mm
Power cord: 2 m
Features
Max. power: 4.8 A RMS
Max. voltage: 31 V
Frequency range: 100 - 5,000 Hz ( ± 3 dB)
Distortion: < 1%
Technical data
Dimensions
42 x 180 x 140 mm
(HxWxD):
Weight:
905 g
Colour:silver-metallic
Power supply:
12 – 30 V DC
via adapter (extern)
Audio-input:
2x Micro input /
2x Line In
1x TOSLINK/ S/PDIF
LA-60
LA-240
Induction loop pads
Induction loop pad for the LA-60 or the LA-240
LA-60
Order No.: A-4213-0
Order No.: A-4910-0
The LA-60 induction loop amplifier
The »pad« contains a small loop. It is connected directly to the LA-240
is designed for use in small rooms
or LA-60 induction loop amplifier and placed under the seat cushion or
up to 16 m or for partial signal
behind the back of a chair. The connection cord for the pad is 4.50 m long.
coverage, at information counters,
As a result, the signal coverage can be restricted to a very small area.
2
for example. It is equipped with two
line/mic input jacks, which can be
selected and activated by flipping
a switch. The control switch is used
to individually adjust the volume.
Control lamps help in the operation
of the system by indicating the corresponding status signals.
Technical data
Power supply: 180 – 265 V AC
50 / 60 Hz 10 VA
Dimensions (HxWxD): 65 x 121 x 35 mm
Weight: 146 g
Induction loop system output power
1.3 A RMS, 1.82 A surge output current
100 - 5 kHz – compliant with the
BS6083 pt4 (IECI 18-4) standard for a
loop, with 24 / 0.2 cable (0.75 mm²) at
0.03 Ω/m
Small »Cross-the-counter« induction loop
Cross-the-counter
Induction loop
amplifiers and
components for
small to mediumsized rooms
Order No.: A-4917-0
The small »Cross-the-counter« induction loop has been designed to supply
induction loop signals to small areas, such as individual service points
or reception desks. The system is installed – generally underneath the
table top – using adhesive clamps with a space requirement of approx.
35 x 35 cm; recommended induction loop amplifier: LA-60 or LA-240.
»EH1205« replacement microphone for LA-240 and LA-90
Order No.: EH1205-0
Directly connected to the induction loop amplifier, the microphone (included with the LA-240) provides a speaker with ample freedom of movement
in close dialog with four meters of cable and a clip. It can also be ordered
separately as a replacement microphone or a second microphone to be
Mikrofon »EH1205«
connected to the second microphone jack.
7
PROLOOP C
Induction loop
amplifier
High output current:
4.8 A RMS
PROLOOP C
Order No.: A-4246-0
Short-circuit-proof
Automatic fuse reset
The PROLOOP amplifier family is
Two symmetrical
designed for professional use in
XLR(F) input jacks
medium-sized rooms (up to 170 m²)
One RCA input jack
in private buildings and public
One line output jack
facilities, in which particularly high
Extra-sturdy jacks
Dual action AGC
for excellent speech
recognition
High availability,
operating reliability and
quality assurance
Convenient monitoring of
the magnetic field: Can
be done using headphones or speakers
Treble control to compensate for treble losses
due to reinforcement
dependability and extremely reliable
operation are required.
Thanks to a 100-percent shortcircuit-proof amplifier, switchable,
symmetrical XLR(F) input jacks
and extremely stable output performance, the PROLOOP C is able to
meet these demands.
Automatic Gain Control (AGC)
guarantees consistent field strength
and reproduces stable sound with a
special emphasis on clear speech,
even under acoustically demanding
conditions.
Corresponding test equipment
can be used to evaluate the sound
quality via the integrated monitor
out jack.
8
Technical data for the PROLOOP C
Mains connection: 115 / 230 V AC (main transfer switch)
50 / 60 Hz, 7-200 W, 10 A fuse
Coverage: 170 m² acc. to IEC 60118-4, single-loop, free field
Induction loop output
Max. current: 4.8 A RMS, 13.6 A peak, 1-5 ms, 1 kHz,
short-circuit-proof
Max. voltage: 11 V RMS, 15.5 V peak
Output AGC: Sets voltage and power for steady signals like oscillation and
sine curves after 0.6-1 seconds to -10 dB. Short pulses and
normal program signals are not limited.
Frequency response: 100 - 5,000 Hz ( ± 3 dB)
Distortion: < 1%
Cable connection: Screw connection on rear panel of the amplifier
Outputs
1. LINE OUT: 0 dBm-RCA out (with AGC function)
Inputs
IN 1 und 2: 0.5 mV-100 mV / 10 kΩ (mic.) alt. 25 mV - 4 V/ 10 kΩ (line)
AGC, switchable phantom voltage, XLR(F) connections
IN 3: 50 mV-10 V / 10 kΩ, RCA connection
AGC
Dynamics: > 70 dB
Rise time: 2 - 500 ms
Fall time: 0.5 - 20 dB/s
Controls and displays
Treble control: 0 - +9 dB, potentiometer
Induction loop
adjustment: 0 - 170 m², potentiometer
Displays: Mains connection: 1 green LED
Input level: 1 green LED
Induction loop power: 1 green LED
Induction loop monitoring
6.3 mm jack for headphone connection
Enclosure
Dimensions: 64 x 295 x 205 mm (H x W x D)
Weight: 3.6 kg
Colour: black
PROLOOP DCCplus PROLOOP DCCplus Technical data
Main connection
230 V AC, 45-60 Hz, 150 Watt
Passive protection
Fuse 1.5 A
Surface coverage
1000 m² acc. to IEC 60118-4
Induction loop output
Max. current
12 A RMS, 34 A from peak to peak, 1-5 ms, 1 kHz
Max. voltage 32 V RMS, 45 V peak
Output-AGC Keeps the audio signal level constant within the connected loop. AGC reaction time: Sinus -10 db at 8 msec to 2 sec.
Frequency range
100 – 5.000 Hz (±3 dB)
Distortion
< 1 % at nominal output, 1KHz
Cable connection
2 screw terminals on the reverse of the device
Outputs
Slave
LINE OUT 0° / 90° Phase shift adjustable, 6.3 mm jack plug
Inputs
IN 1
XLR (F) socket,
MIC IN (symmetric, sensitivity 1 mV )
IN 2
XLR(F) socket, can be switched as a microphone or line input
100-V priority input for connection to PA systems
Slave
SLAVE-IN (6,3 mm jack plug)
AGC
Dynamics
> 36 dB
Control and display
Induction loop setting
Rotary knob
Input level
IN 1 and IN 2 can be adjusted separately
Display
Main connection: 1 green LED AGC / Compression
Input level 6 differently coloured LEDs
Current: 6 differently coloured LEDs
Induction loop monitoring
1 headphone output
Housing
Dimensions
90 x 430 x 270 mm (H x W x D),
19-inch rack (2 height units)
Attachment
4 attachment points on the front plate
for installation in 19-inch rack
Colour
black
Weight
7,8 kg
PROLOOP DCCplus
Order No.: A-4264-0
The PROLOOP DCCplus is designed for rooms of up to 1000 m²
with loop signals and is the ideal
solution for events and meeting
venues.
We gave the PROLOOP DCCplus
a complete overhaul and the revised model for 2015 is better than
ever!
Each of the two XLR(F) inputs
can be configured as LINE (symmetrical) or as microphone input
(asymmetrical).
The equipment provides an output
of up to 12 A RMS and guarantees
secure audio transmission. The
Automatic Gain Control hereby
ensures good sound reproduction
at constant field strength and high
stability.
Loop amplifier –
also for low overspill installations
Simple and safe handling
High output current:
12 A RMS
Main transfer switch 115 /
230 V AC
Active protection against
short circuits
Two XLR(F)-sockets, one
configurable as
Microphone input (amplifier setting, phantom feed)
or
LINE-input (amplifier
setting)
100-V-priority input for the
connection of ELA systems
Separate treble/base
regulation
Display of loop current
3,5-mm-headset socket to
monitor audio signals
Control to reduce metal
losses
Suitable for the set-up of
low overspill systems
19” rack casing
For standard and low overspill
supply
Beyond the standard application
the PROLOOP DCCplus is also
suitable for the realisation of low
overspill loop systems. This requires two PROLOOP DCCplus
devices.
9
Standard induction loop systems
An LOS system consists of two
HUMANTECHNIK service for
produce a magnetic field that
induction loop amplifiers that are
planning low-overspill systems
usually exceeds the »core service
operated out of phase. This con-
area«. This »overspill«, which travels
figuration prevents overspill and
horizontally and vertically, might
makes it possible to operate several
still be audible three to four loop
induction loop systems in adjacent
widths away. This limits the use of
rooms without having their signals
this technology.
interfere with each other:
Low-overspill systems
expand the application options
Low-overspill systems
(LOS): Induction
loop systems with low
overspill
of induction loop systems.
Low-overspill systems (LOS) considerably reduce »overspill«. They
use special loop patterns to reduce
the signal strength outside the loop.
For these patterns, two loops have
to be operated out of phase with
each other to achieve an equal
distribution of the desired signal
without creating any undesirable
signal-free areas.
No field strength reduction in
the centre of the loop due to
reinforced concrete,
Greater reproducibility of the
results,
Reduced danger of feedback
due to lower power consumption,
Each individually optimal customisation and configuration depends
on the conditions prevailing in the
area of application, in other words,
on the room floor plans and the
sizes of the coverage areas, the
number of internal loops and the
demands made on low overspill.
Determining the corresponding
values for the »customised« lowoverspill layout and the optimal
level adjustments in each case is
based on a complex method of
calculation and installation. That’s
Extremely low overspill at re-
why we strongly recommend
duced directional sensitivity.
that you take advantage of the
ser­v ices offered by HUMANTECHNIK. We provide competent
support to architects, technicians
and installers in planning LOS
installations.
The overspill
of standard
induction loop systems
works in a horizontal
and vertical direction.
The resulting »eavesdropping effect« is
often still measurable
over distances of up
to three induction loop
widths.
Low-overspill systems
(LOS) that are competently customized and
configured reduce overspill considerably to allow
the operation of induction
loop systems in directly
adjacent rooms.
10
PROLOOP LOS
Technical data
Mains connection: 230 – 240 V AC, 50 Hz, 25 – 700 W
Coverage: 300 m² acc. to IEC 60118-4
Induction loop output
Max. power: 2x 5 A RMS, 2x 14 A from peak to peak, 1-5 ms, 1 kHz,
continuous 1 kHz, short-circuit-proof
Max. voltage:
2x 17 V RMS, 2x 24 V peak
Output AGC: Sets voltage and power for steady signals like
oscillation and sine curves after 0.6-1 seconds
to -10 dB. Short pulses and normal program signals
are not limited.
Frequency range: 100 – 5,000 Hz (±3 dB)
Distortion: <1%
Cable connection: 2 screw connections on rear panel of the amplifier
Outputs
Master OUT: 0 dBm, RCA (with AGC function)
Slave OUT: 0 dBm, RCA (with AGC function)
Inputs
IN 1: Combined XLR(F) / 6.3 mm jack
MIC sensitivity 2.5 mV – 10 V RMS / 10 kΩ,
LINE sensitivity 37 mV – 10 V RMS / 10 kΩ
or phantom voltage 9 – 20 V
IN 2: Dual RCA connections, 45 mV – 10 V RMS / 10 kΩ
IN 3: Dual RCA connections, 45 mV – 10 V RMS / 10 kΩ
AGC
Dynamics: > 70 dB
Rise time: 2 – 500 ms
Fall time: 0.5 – 20 dB/s
Rise and fall times depend on the currently active channel
Controls and displays
Loop setting: 0 – 300 m² (with one potentiometer each for
master and slave outputs)
Input level: IN 1 and IN 2 can be adjusted separately
Displays:
Mains connection:
1 green LED
Input level: 1 green LED
Induction loop power: 2 green LED
Induction loop monitoring
Two 6.3 mm jacks for headphone connection
Enclosure
Dimensions: 88 x 438 x 280 mm (H x W x D)
Colour: Black
Weight:
9.3 kg
PROLOOP LOS
Order No.: A-4252-0
PROLOOP LOS is a complete
system for the operation of lowoverspill systems. It includes the
full range of electronics required
in a single enclosure. Thus, there
is a flexibly sized, reliable lowoverspill solution available to serve
neighbouring event rooms and
Induction loop
amplifier system
for low-overspill
installations
Uniform coverage throughout
the room (no dead spots in the
middle of the room)
No signal fluctuations when
hearing-aid user moves
his/her head
Reduced sensitivity in
respect to architecture-related
steel reinforcements
assembly halls up to 300 square
High efficiency, low power
consumption
metres in size.
19“ design
The system is equipped with Automatic Gain Control (AGC) to produce
stable sound with outstanding
speech reproduction, even under
difficult acoustic conditions. The
Well suited for retrofitted
installation in theatres,
cinemas, concert halls,
schools, conference rooms,
housing, etc.
(Possible for floor
reconstructions only)
integrated monitor output for the
corresponding measurement technology makes it possible to easily
and conveniently test the sound
quality of the induction loop system.
11
PROLOOP LOSplus
Induction loop
amplifier system
for low-overspill
installations in
large rooms
Homogeneous signal supply
PROLOOP LOSplus
Order No.: A-4254-0
As a ready-for use system for
operating low-overspill systems in
to rooms up 1,000 m²
large rooms of up to 1,000 m², the
No signal fluctuation when
induction loop amplifier PROLOOP
hearing aid wearer moves head
LOSplus has all the required elec-
Reduced sensitivity in respect
tronic configurations in one single
to architecture-related steel
reinforcements
High efficiency,
low power consumption
19” model
casing.
The high-performance amplifier has
an Automatic Gain Control (AGC)
that also guarantees stable sound
with excellent speech reproduction
even in difficult acoustic conditions.
For acoustic quality controls on
the induction loop outputs A and
B, the PROLOOP LOSplus has a
monitor output for connection of
headphones.
12
Technical data
Main connection 115 / 230 V AC, 50-60 Hz, 300 Watt
Passive protection Fuse 2.5 A
Surface coverage 1,000 m² acc. to IEC 60118-4
Induction loops output
Max. current
2x 12 A RMS, 2x 34 A from peak to peak, 1-5 ms, 1 kHz
Max. voltage
2x 32 V RMS, 2 x 45 V peak
Output AGC
Keeps the audio signal level constant within the connected loop. AGC reaction time: Sinus -10 db at 8 msec to 2 sec.
Frequency range
100 – 5,000 Hz (±3 dB)
Distortion
< 1 % at nominal output, 1KHz
Cable connection
2 screw terminals on the reverse of the device
Outputs
Slave LINE OUT
6.3 mm jack plug
Inputs
IN 1
XLR(F) socket,
Microphone input MIC sensitivity 2.5 mV – 10 V RMS
IN 2
XLR(F) socket, can be switched as a microphone or line input
100-V priority input for connection to PA systems
Slave
SLAVE IN (6,3 mm jack plug)
AGC
Dynamics
> 36 dB
Control and display
Loop setting
Rotary knob for channel A and B
Input level
IN 1 and IN 2 can be adjusted separately
Display
Main connection: 1 green LED
Input level
6 differently coloured LEDs
Current
6 differently coloured LEDs per loop channel
Induction loop monitoring
1 headphone output (left audio channel for induction loop output A and right audio
channel for induction loop output B)
Housing
Dimensions (H x W x D) 90 x 430 x 270 mm
19-inch rack (2 height units)
Attachment
4 attachment points on the front plate
for installation in 19-inch rack
Colour
black
Weight
9.3 kg
»Induction loop
receiver« and
accessories
LPU-1: Induction loop receiver / Under-the-chin receiver
Order No.: A-4276-0
CRESCENDO 50
Order No.: A-4202-0
The universal CRESCENDO 50
The LPU-1 takes the signals trans-
audio amplifier, which was specially
mitted by the induction loop system
designed for dialogue situations,
directly to the ears of people who
can also be used as a pocket re-
do not wear hearing aids.
ceiver for induction loop systems.
The ear buds of the featherweight,
ergonomically designed underthe-chin receiver can swivel to stay
firmly fixed in the user’s ears even
when he/she moves his or her head.
An under-the-chin receiver serves
S/PDIF Audio converter
Order No.: A-4963-0
The S/PDIF converter (operation
with power supply unit) converts
digital signals of respective audio
sources into analogue signals, allowing their further processing by
systems with analogue input.
as the listening device.
Single-bay recharger for the
LPU-1
Order No.: A-4977-0
The flexible material used to make
Silicone earpieces for LPU-1
under-the-chin receivers
(also for RCI-102)
Standard
the ear buds also nestles gently
When the LPU-1 is not in use, it
Order No.: A-4985-0 (2 sets)
into the auditory canal to effectively
can be placed into the recharger
Order No.: A-4987-0 (24 sets)
subdue any ambient noise.
to recharge.
LPU-1: Technical data
Sound frequency
transmission range: 70 - 5,400 Hz
Distortion factor: < 1 %
Signal-to-noise ratio: Typ. 60 dB
Battery charging time: Approx. 6 h
Operating time: Approx. 6 h
Maximum volume: Approx. 120 dBA
Weight: 47 g
Tapered shape
Order No.: A-4988-0 (2 sets)
Order No.: A-4989-0 (24 sets)
Perforated
Order No.: A-4993-0 (2 sets)
Order No.: A-4992-0 (24 sets)
13
Multiple charge
stations, storage and
transport components
for loop receivers
A100: Additional battery for
the LPU-1
Order No.: A-4970-0
5-bay recharger for
the LPU-1 under-the-chin
receiver
Order No.: A-4976-0
12-battery recharger for the
A100 battery
Order No.: A-4974-0
5-bay recharger for the
PR-20+ combined receiver
Order No.: A-4972-0
Aluminium case designed
to accommodate up to
15 receivers
Order No.: A-4072-0
The tray in the case provides for
the safe and reliable storage and
transport of up to 15 LPU-1, RCI-102
receivers. In addition, the induction
loop receivers can also be conveniently distributed »straight from the
case«.
Plastic tray for 5
under-the-chin receivers
Order No.: A-4955-0
Aluminium case with charging
stations and accomodation
for 10 underchin receivers
Order-No. A-4183-0
This case contains two charging
Transport safe storage system –
stations of type A-4976-0. 10 re-
e.g. as insert for case A-4072-0 for
ceivers LPU-1 or RCI-102 can be
LPU-1 receiver.
charged as well as safely stored
and transported. The power connector is on the outside, the power
supply unit is included.
14
»General accessories
for induction loop
systems«
XLR(M) adapter cord -->
3.5 mm cinch
Order No.: A-4933-0
e.g. to connect to CD players or
Table microphone with
XLR(M) plug connection
Order No.: A-4495-0
needs 2 AA batteries
stereo systems
Induction loop pad
(description, see p. 7)
Order No.: A-4910-0
PROLOOP FSMplus:
Measuring device for induction
loop systems
Order No.: A-4291-0
The PROLOOP FSMplus is a mea­
Cinch connection cord
Order No.: A-4906-0 (length: 3 m)
Order No.: A-4907-0 (length: 6 m)
suring device that measures the
magnetic field strength of induction
loop systems according to IEC
60118-4:2006 and BS 6083, Para.
4. The device delivers reliable RMS
values on the output level, response
frequency, AGC function (Automatic Gain Control), distortion and
background noise in the induction
looped tested. In addition, it enables the user to make an acoustic
evaluation of the sound using signal
reproduction via earphones.
XLR(M) --> 6.3 mm plug
Order No.: A-4939-0
Connection of 1- (UHF101) or
4-channel (UHF401) microphone
systems.
XLR(F) --> 3.5 mm plug
XLR connection cord
XLR(F) --> XLR(M)
Order No.: A-4935-0 (length: 2 m)
Order No.: A-4936-0 (length: 6 m)
Copper ribbon cable
Order No.: A-4937-0 (50 m)
Order No.: A-4948-0 (100 m)
Order No.: A-4934-0
For the connection of the table
microphone to the LA-90 or .
21 x 0.4 mm – insulated
Features
Compliant with IEC 60118-4:006 and BS
for testing equipment used to evaluate
induction loop systems.
True RMS: 125 ms average time
Crest factor: 3
A filter
Measuring range:
+6 dB ...-40 dB (0 dB = 400 mA/m)
Power supply: 2x 1.5 V AA batteries,
long battery life
Display: Battery status control
via LED / field strength: via LED-scale
(approx. 1 dB resolution)
Headphone jack with volume control
Dimensions (W x H x D):
83 x 126 x 35 mm
Weight: approx. 170 g (incl. batteries)
Wireless PLL microphones,
1- or 4-microphone systems –
also recommended as an audio
source for infrared transmission
systems (see p. 18 ff).
(Description, p. 23)
15
How does an infrared audio
for certain large professional
Advantages of infrared
transmission system work?
applications.
transmission technology
An IR audio transmission system
This applies in particular to venues
consists of at least one transmitter
and facilities, ...
and one receiver. The transmitter is
connected to an audio source – to a
microphone system, for example –
and transmits the signals received
in the form of infrared light impulses
wirelessly to the receiver, which
converts the light impulse received
»Function and
use of infrared
transmission
systems«
into electrical audio signals and
feeds them into the reproduction
device connected – into headphones, for example, or a teleloop
for the inductive direct transmission
to hearing aids.
Areas of application
to the receivers of the
transmission system. The
transmitter’s large signal
emission angle or the wide
signal dispersion and the
reflection from walls, ceilings and floors guarantee
reliable reception – for
the most part, even when
smaller obstacles (furniture
or pillars) block the direct
»line of sight« between
the transmitter and the
receiver.
16
there plays a decisive role,
for example in courtrooms or
conference rooms,
and areas, ...
... in which several transmission
in which the transmitter is
installed.
Transmission is reliable and
absolutely free of the interference caused by electromagnetic fields or structural
elements in the building, such
systems are operated parallel
as metal reinforcements. In
to one another in neighbouring
addition, these systems do not
rooms, such as in multiplex
produce any electromagnetic
cinemas or in living quarters
emissions themselves.
in social facilities.
Infrared transmission systems
can be used easily in many dif-
Apart from the home environment,
sion systems have proven valu-
ferent countries; an »obligation
in which the wireless reception of
able in schools and universities,
to register« them, similar to the
audio signals via infrared light has
in large auditoriums with partial
allocation of radio licenses, is
long since become a popular alter-
signal cover­age or in city centres,
not required.
native to the corresponding radio-
in which there is a very high rate of
frequency transmission systems,
radio-frequency emissions.
to all other transmission principles
»infrared signal route«
the information exchanged
pass through walls, which
reduces reception to the room
In addition, infrared audio transmis-
this technology proves superior
The transmitter sets up an
... in which the confidentiality of
Infrared light signals cannot
Coverage
While the range of systems designed for private use is limited
Other factors affecting infrared
Light-coloured floor, wall and
transmission technology:
ceiling areas reflect infrared
energy more strongly. This can
The transmitter does not focus
increase the reception range.
to about 10 or 20 metres, high-
the emission of the infrared
powered infrared transmitters are
light impulses, i.e. it uses a
able to provide coverage for much
very large transmission angle.
ceilings and walls absorb the
larger rooms. The transmitters
As a result, there is generally
energy and can limit reception
described in this product overview,
no need for a specific »line of
ranges as a result.
for example, are able to provide
sight« between the transmitter
coverage for up to 900 m².
and the receiver.
Other characteristics of infrared
audio transmission systems:
Portable/mobile systems are
available.
Multi-channel operation pro-
The carrier frequencies of 2.3
to 3.8 MHz (basic band) mini-
The signals do not only travel
mize the probability of interfer-
directly between the transmit-
ence resulting from powerful
ter and the receiver, but are
lighting. However, functional
also reflected from the walls,
problems due to direct sunlight
cei­lings and floors. Neverthe-
cannot be ruled out altogether.
less, pillars and furniture –
vides for flexible use, making
depending on their size and
it possible to simultaneously
position – can interfere with or
transmit several different lan-
even block reception under
guages, for example.
certain conditions.
Receivers are compatible
Dark, low-reflection floors,
In order to provide coverage
for areas that exceed the maximum range of the individual
transmitters, it is necessary to
install several transmitters at
In any case, a technically
with TV listening systems for
correct, precise positioning
at-home use.
of the transmitters is
Reliable, inconspicuous
audio transmission for
rooms up to 900 m²
in size
different locations and connect
them in parallel.*
required for optimal signal
coverage.
The signals are transmitted to the hearing aid via
a special infrared receiver
with audio amplification
equipped with a teleloop
(induction).
If the receiver is equipped
with an audio output
jack, it is also possible to
use headphones or earphones.
Amplifying infrared audio
receivers are available as
pocket devices, underthe-chin receivers, headphones with reception
diodes or in the LR version
with a teleloop and audio
output.
* If the reception range is the main criterion for the application in this context, it is advisable to consider the use of a radio-frequency system
as an alternative – also taking into consideration the cost factor (p. 30 ff.).
17
PRO IR-202
Infrared transmission
system for medium
range, combined
configuration possible
PRO IR-202 Transmitter
Order-No.: A-4082-0
The transmission energy of PRO
IR-202 Transmission/Modulator unit
spreads club-shaped in the room
in a broad aperture angle (see illustration bottom right). The audio
transmission is trouble-free due to
the infrared signal modulation on
2.3 and/or 2.8 MHz. The PRO IR202 can be combined with a further
PRO-IR-202 in order of increasing
the range and the dispersion angle
of the infrared signals up to 240°.
18
A set for ceiling and wall mounting
is included in the delivery. A tripod
(Item-No: A-4986-0) is available as
an accessory (page 25).
PRO IR-202 at a glance
Broad exit angle of infrared
signals
Configuration with 1 and 2
channel transmission
Combinable: Two
PRO IR-202 transmitters can
be linked
Power supply of secondary
unit by interconnecting cable
Operation of combined
configuration with a single
power supply unit
Usable as fixed (wall or ceiling
mount) or mobile installation
(e.g. tripod, see page 25).
Specifications
Power supply:
Power supply unit input: 100-240 V AC, 50-60 Hz,
Exit: 24V DC, 0.5 A (2.5 mm barrel plug,
centre contact »positive«
Connection cable:
2 x barrel plug 2,5 mm
Carrier frequency:
2,3 MHz (channel 1) and 2.8 MHz (channel 2)
Infrared transmission power:
0.7 W
Ranges/ Single transmitter: 1-channel operation 180 m²
Supply areas:
Combined mode (2 transmitters): 370 m²
Input
Line-input: Cinch channel 1 and channel 2
Microphone input: 3.5 mm jack plug, sensitivity adjustable via control dial
In- / Outputs for combined mode
Primary transmitter: Power-out 24 V, audio-out “sync out”
Secondary transmitter: Power-in 24 V, audio-in “sync-in”
Display
LED:
Input-level indicator LEDs, 1 per channel.
Mechanical data
Ambient conditions:
0 – +50 °C ambient temperature (non-condensing, non-corrosive environment)
Mounting types:
Wall or ceiling mount: installation kit included
tripod (optional)
Dimensions:
254 x 79 x 64 mm (W x D x H) incl. front panel
Colour:
black with white lettering, red acrylic strip
Weight:
300 g
Certification:
CE, WEEE, RoHS
Combined mode
Combining two PRO IR-202 with
each other occurs via the supplied
installation kit. All necessary cables
are included.
The units mounted on top of each
other can be freely turned to the
required angles to achieve optimal
signal supply in the room. The
range of the combined units is up
to 370 m² at one-channel transmission - ideal for large rooms.
With the selection of the suitable
receiver type (RCI-102, PR-22+ or
IP-112) the range can be further
influenced, depending on the sensitivity of the receiver diodes.
PRO IR-202: Greater range through
combining two transmitters
Range example
Single transmitter PRO IR-202
PRO IR-202 + one further trans-
mitter PRO IR-202 in identical
orientation
19
PRO IR-400
High-performance
infrared transmitter
Possible application areas:
Cinemas
Parallel transfer of different
languages (channel selection)
Conference and meeting rooms,
multimedia rooms
Courts and lecture halls
Schools, universities
Churches
Infrared transmitter PRO IR-400
Order No.: A-4026-0
The two-channel infrared transmitter
PRO IR-400 combines the modulator
and transmitter in one unit in a single
Housing. This design saves costs
and can be mounted in a spacesaving manner.
The system generates a wide exit
angle for the infrared signal, which is
spread efficiently throughout the supplied areas in the club shape typical
for this transmission technique.
The transmission of the PRO IR-400
is realised securely at a working
bandwidth of 2.3 and 2.8 MHz and
without any interfering ambient light.
Technical data
Dimensions (WxHxD)
Weight
Colour Housing
Power supply adapter
DC-input
Power consumption
Carrier frequencies
Input impedance
Trigger voltage of the
Input level display
Total range at +/- 3 dB
Audio-Inputs
Sync-in / Sync-Out
Microphone input
Audio display
Sender range
Temperature range
Attachment
Conformities
Compatible receiver
41.2 x 32.7 x 7.5 cm
1,100 g
Anthracite / front panel: dark red transparent
Primary 230 V~ 50-60 Hz, secondary 28 V DC
Low-voltage connector, 28 V DC, middle is »+«-Pol
700 mA
2.3 MHz (left or A-channel) and
2.8 MHz (right or B-channel)
Audio-In: 18 kΩ
Mic-In: 1.3 kΩ
Audio-In: 110 mV
Mic-In: 1.5 mV
Lower limit: 400 mV
Upper limit: 6 V
Cinch (RCA) for left and right and/or A and B-channel
Cinch (RCA) for left and right and/or A and B-channel
6.4 mm Stereo-jack plug
Input level-LEDs, one per channel.
30 metre, closed room
0-40°C
Wall attachment with conventional hooks,
Tripod attachment via standard screw attachments
CE, WEEE, RoHS
RCI-102, IP112
In 1-channel mode, the transmitter supplies areas of up to 900 m².
Adding additional transmitters of the
type PRO IR-400 allows the receiving
Main PRO IR-400
system
PRO IR-400
PRO IR-400
PRO IR-400
range to be expanded easily. The
delivery includes an attachment set
for wall and ceiling mounting. There
are also tripods available for freestanding installations.
The reception area can be multiplied by connecting several transmitters.
20
Infrared receivers
compatible with all
infrared transmitters with
the operating frequencies
Two-channel infrared
under-the-chin receiver
RCI-102
Order No.: A-4043-0
The RCI-102 is an ergonomically
designed under-the-chin receiver
that weighs just 52 grams and is
equipped with swivelling earpieces, which means that the earpieces
retain their position in the ear even
when the user turns his/her head.
Technical data RCI-102
Weight:
Colour and material:
Rechargeable battery, battery life:
Modulation processes:
Sound frequency transmission range:
Operating frequencies:
Harmonic distortion:
Signal-to-noise ratio:
Controls:
Maximum volume:
Main switch:
of 2.3 MHz and 2.8 MHz
52 g with battery
ABS plastic, black and red
A100 NiMH battery, approx. 5 h
FM, mono or stereo
15 - 20,000 Hz
2.3 MHz and 2.8 MHz
Possible selections: stereo reception or
either frequency for mono reception
<1%
Typ. 60 dB
Knob to adjust the volume;
Balance can be adjusted with the help
of a screwdriver
Approx. 120 dB
Integrated in the »receiver«
The flexible material used to make
the ear buds also nestles gently
into the auditory canal to effectively
subdue any ambient noise.
Stereo or selective mono reception, e.g. for multi-language
transmissions.
The RCI-102 is equipped with a
switch to select the frequency
Single recharger for
Silicone earpieces for the
the RCI-102 under-the-chin
RCI-102 under-the-chin receiver
receivers
(also for the LPU-1)
Order No.: A-4977-0
Recharger for one under-the-chin
receiver and two separate rechargeable batteries.
Standard
Order No.: A-4985-0 (2 sets)
Order No.: A-4987-0 (24 sets)
Tapered shape
channels. Both channels are con-
Order No.: A-4988-0 (2 sets)
stantly active for stereo transmis-
Order No.: A-4989-0 (24 sets)
sions. If the event organizer uses
both the 2.3 MHz and the 2.8 MHz
frequency ranges to transmit in two
different languages at the same
Perforated
Order No.: A-4993-0 (2 sets)
Order No.: A-4992-0 (24 sets)
time, the listener can select the
channel in his/her preferred language and receive the information
in mono mode.
Cases able to accommodate
under-the-chin receivers – Description: p. 25
21
Infrared
receivers
Headphones with 2-channel IR-receiver »IP112«
Order No.: A-4039-0
IR-receiver »PR-22+«
Order No.: A-4037-0
The wireless headset with 2-channel IR-receiver is suitable for the operation
The »PR-22+« (with AGC, Auto-
with transmitters operating on 2.3 or 2.8 MHz. It reproduces audio signals
matic Gain Control) is a high per-
in excellent sound quality. The easy to operate headset is equipped with
forming 2-channel receiver for
a number of comfort functions including the adaptation of the sound pat-
infrared signals. It allows using the
tern to individual listening preferences. The volume can be individually
range of the respective transmitters
regulated on each side of the headset.
to its fullest. The 3.5 mm audio out-
Technical features IP-112 / PR-22+
Receiver frequency
2.3 MHz & 2.8 MHz (can be switched)
Modulation
FM broadband
Reception
360°
Frequency response
60 Hz to 12 kHz ± 3 dB
Signal-to-noise ratio54 dB not weighted
Power supply
2 AAA alkaline batteries
Usage period, normal
20 hours
Power consumption
25 mA maximum; 20 mA typically
Maximum output
6 mW
Receiver lens
Infrared element with ambient light filter
Operating elements
ON/OFF, volume regulation left and right,
channel selector switch
Colour
black
Weight 200 g
put socket permits the connection
of various audio components, e.g.
under-chin receiver, headset, ear
plugs and headphones, teleloop or
direct cable for hearing aids and/
or CI systems.
Single recharger for the
PR-22+ infrared receiver
Order No.: A-4971-0
Also compatible with previous
model »PR-20+
5-bay recharger for the
PR-22+ infrared receiver
Order No.: A-4972-0
Also compatible with previous
model »PR-20+
22
Wireless UHF101 microphone
Order No.: A-4450-0
Wireless UHF401 microphone
Order No.: A-4455-0
The wireless UHF101 microphone
The 4-channel UHF401 micro-
set (PLL) can be used in combina-
phone system is designed for use
tion with any of the transmission
anywhere where up to four different
systems described in this brochure.
speakers talk from different loca-
The set consists of a handheld
tions, in churches, for example.
transmitting microphone and the
receiver that transmits the signals
via cable to the corresponding
audio output device.
Accessories
for Infrared
Transmission
Systems
Four independent handheld microphones transmit the voices
wirelessly to the stationary receiver,
which in turn feeds the signals via
cable into an audio output device,
such as an induction loop amplifier
or an infrared or a radio-frequency
Portable pocket transmitter
transmitter.
with PLL microphone...
... to be used with the
UHF101 set
Order No.: A-4460-0
Technical data for the UHF101
RF transmission frequency:16 frequencies in
the range from 863 to 864 MHz
Frequency stability: ±0.005 %,
PLL synthesized circuit
Modulation:FM
Range:
Up to 100 m
Distortion factor:
0.4%
Audio frequency
response:
60 to 21,000 Hz, -3 dB
Technical data for the UHF401
RF transmitting frequency: 16 frequencies in the
range from 823 to 832 MHz
Frequency stability: ±0.005 %,
PLL synthesized circuit
Modulation:FM
Range:
Up to 100 m
Distortion factor:
0.4%
Audio frequency
response:
60 to 21,000 Hz, -3 dB
Receiver
Reception type:
Noise suppression:
Audio output:
Power supply:
Receiver
Reception type:
Noise suppression:
Audio output:
Power supply:
Dual antenna, PLL
> 90 dB
XLR(M) or 6.3 mm jack
DC 22 V / 400 mA
(AC/DC adapter included)
Transmitter
Transmission power: 10 mW
Power supply: Alkaline / NiMH batteries 2x AA
Operating time: 6 - 8 h
Dual antenna, PLL
> 90 dB
XLR(M) or 6.3 mm jack /
Composite signal:
6.3 mm jack
DC 22 V / 1.2 A
(AC/DC adapter included)
... to be used with the
UHF401 set
Order No.: A-4460-0
The handy transmitters can be worn
directly on the body. The speaker
then simply clips the microphone
to his/her collar to have both hands
free.
Transmitter
Transmitting power: 10 mW
Power supply: Alkaline / NiMH batteries 2x AA
Operating time: 6 - 8 h
23
Accessories for
infrared transmission
systems
Under-the-chin receiver
(closed)
Order No.: A-4903-0
12-battery recharger for
A100 batteries
Order No.: A-4974-0
Under-the-chin receiver weighing
Time-saving recharger for users
less than 30 g, which can be con-
who operate a larger number of the
nected to the PR-22+ receiver. The
receivers (RCI-102)
ergonomically shaped earpieces
fit snugly into the auditory canal.
Due to the 3,5 mm jack plug, this
receiver can be used with a wide
Replacement A100 battery
for RCI-102
Order No.: A-4970-0
Aluminium case designed
to accommodate up to 15
under-the-chin receivers
Order No.: A-4072-0
The tray in the case provides for the
safe and reliable storage and transport of up to 15 LPU-1 or RCI-102
receivers. In addition, the under-thechin receivers can also be conveniently distributed »straight from the
case«.
range of different audio devices
5-bay recharger for RCI-102
receivers
Order No.: A-4976-0
S/PDIF Audio converter
Order No.: A-4963-0
The S/PDIF converter (operation
with power supply unit) converts
Recharger with 5 independent
digital signals of respective audio
recharging bays for the receivers.
sources into analogue signals, allowing their further processing by
systems with analogue input.
24
Plastic tray case for 5 underthe-chin receivers
Order No.: A-4955-0
Safe storage and transport system – for example as insert for the
A-4072-0 case, for example – for
LPU-1 or RCI 102 type eceivers.
Accessories for
infrared transmission
systems
Aluminium case with charging
Tripod for infrared transmit-
stations and accomodation
ters PRO IR-202 and
for 10 underchin receivers
PRO IR-400
Order-No.: A-4183-0
This case contains two charging
stations of type A-4976-0. 10 receivers LPU-1 or RCI-102 can be
charged as well as safely stored
and transported. The power connector is on the outside, a power
supply unit is included.
Order No.: A-4986-0
This height adjustable tripod is
equipped with mounting components matching the respective
receivers.
Pulls out to a maximum of 3 m
Maximum load 20 kg
Aluminium case with charging
stations and accomodation
for IR-receivers PR-22+
Order-No.: A-4189-0
This case also contains two charging stations, but of type A-4972-0
for infrared receiver PR-22+. (Also
useable for previous model PR20+).
10 receivers PR-22+ can be
charged, safely stored and transported. The power connector is on
the outside, the power supply unit
is included.
25
RF transmission systems
Of all the wireless transmission
technologies, radio-frequency
transmission has been around for
the longest time. Not surprisingly,
then, it is also the most common,
and with respect to audio transmission systems for accessible sound,
it proves to be the most powerful
system with the largest ranges of
coverage.
Function and use of
radio-frequency
transmission systems
The basic configuration of a radiotransmission system consists of
a transmitter and at least one
receiver. The transmitter, which is
connected to an audio source – to
a microphone system or any other
signals to the hearing aid.
and independence from
tural structures, radiofrequency transmission
systems are also ideally
suited to open-air
applications.
Radio-frequency signals
are able to easily pass
through walls. The
listeners can leave the
room in which the
transmitter is installed
at any time without any
problem and their RF
receivers will continue
to provide them with the
information they need.
26
alternative to radio-frequency
headphones.
transmission.
Areas of application
Radio-frequency audio transmission
systems have already become
well established as wireless headphones or TV listening systems in
In addition to these stationary applications, portable, so-called tourguide systems have also proven
useful in many areas. Some of the
areas they can be used in include
the home environment.
museums, art galleries,
The systems described in this
tourist attractions and
brochure, however, go above and
beyond this, most importantly because they have been designed
special events
or transportation.
for professional applications – for
The availability and use of several
example:
channels makes it possible to
spacious event venues,
the inductive transmission of the
floor plans and architec-
can be connect to the earphones or
up the audio signals to transmit
with teleloops, which provide for
Due to their ability to
in particular, there is hardly an
in sport arenas or at other
The receivers can be equipped
and for open-air applications
output jacks are also available and
audio system, for example – picks
them wirelessly to the receivers.
provide large coverage
Amplifying receivers with audio
in churches and other
assembly halls,
in lecture or seminar rooms, as
in schools and universities,
pro­v ide different information at
the same time, for simultaneous
interpreting into different languages,
for example, or for the treatment
of different topics for several liste­
ning groups located close to one
another.
Outstanding features of
Sunlight, artificial light and
Some countries charge radio-
radio-frequency transmission
the reflection conditions inside
licensing fees for the use of
technology
rooms do not affect transmission.
these systems. In this context,
Transmitter and receiver do not
RF transmission systems are
require a direct »line of sight«.
easy and convenient to use,
Radio waves can pass easily
they are very portable and,
through normal house and
with multi-channel functionality,
building walls. Listeners take
they are very flexible in their
the sound along, even when
uses and applications.
they leave the room in which
the transmitter is installed.
This means that even very
large areas can be easily
supplied with audio signals.
It is relatively easy to install RF
transmitters, which also makes
it inexpensive. The costs for
installation and hardware do
not increase in proportion to
the size of the area that
requires coverage.
The transmitters can be
installed inconspicuously
(except in metal enclosures)
and do not mar or spoil the
overall architectural picture.
Coverage
With respect to coverage, RF transmission systems are far superior to
the two other transmission technologies described in this brochure.
it cannot be ruled out that the
national regulations in some
countries only release certain
frequency ranges for these
systems (different from the
standard).
More useful information on
the use of radio-frequency
transmission systems
Users of audio radio-frequency
transmission systems should
be aware of the fact that the
With coverage ranges of up to more
coverage ranges or the signal
than 300 metres, it is possible to
scattering go beyond the
easily supply even large arenas
intended coverage areas. As
with audio signals. The trans-
a result, there is no guarantee
mission distances of tour-guide
that the information transmitted
systems with approximately 30
will remain confidential.
metres makes it possible to supply
information even in large groups or
groups in different locations.
When planning the parallel
use of this type of system – in
neighbouring rooms, for ex-
Factors influencing the
ample – the transmission must
operation of radio-frequency
be made on different channels
transmission technology
(compare the number of chan-
Other RF systems or
electromagnetic emissions
An attractively
priced, functional
solution designed
to provide large
areas with audio
signals
nels available with the number
of channels required).
could have a negative effect
on transmission and signal
quality.
Users must make sure that
their transmission channels
are set correctly.
27
The portable
3-channel
transmission system
Transmitter CT-711
Convenient
radio-frequency
transmission
system for
guided tours
simultaneous selective
transmission of different
languages
clear understanding,
even in noisy environments
or under other unfavourable
acoustic conditions
The minimum configuration of a
three-channel audio RF system with
compact, easy-to-use transmission and reception components
includes a transmitter (CT-711)
with a microphone and a receiver
(CR-711).
This system can be used as a
tour-guide system and allows
simultaneous transmission in multiple languages with three different
frequency channels. Audio signal
processing puts emphasis on the
voice frequencies rather than on
the annoying background noise.
CT-711 portable transmitter
Technical data: CT-711 transmitter
Dimensions (H x W x D): 133 x 65 x 33 mm
Weight: 97 g (without batteries)
Colour: Black
Material: ABS / polycarbonate, impact-resistant, unbreakable
Batteries: 2x AA 1.5 V alkaline batteries,
uninterrupted power supply for approx. 20 h
or 2x AA 1.2 V NiMH rechargeable batteries*,
uninterrupted power supply for approx. 15 h
Charging times: Approx. 14 to 16 h when using 2bay charger HC-32
Operating frequencies: 863,000 to 865,475 MHz
Range: 30 metres when using the CR-711 receiver
Stability: ± 0.5 MHz, 0 – 50 °C
FM deviation: 40 kHz ± 5 kHz, transmission input at 1 kHz, 2.5 mV
Noise reduction: 50 µS
Sensitivity: < - 90 dBm at 60 kHz deviation
RF output: 15 dBm
Response frequency: 80 Hz – 15 kHz, ± 3 dB
Distortion: < 2.0 % THD
Transmission antenna: 5 cm
Microphone connector:
Mini-XLR
Recharging contacts: Compliant with HC-32 battery recharger
Certifications: CE, ROHS, WEEE, ETSI EN 301 357-1, ETSI EN 301 357-2
Order No.: A-4176-0
The portable CT-711 broadband
RF transmitter can be clipped to
a belt. An impact-resistant plastic
enclosure protects the audio and
transmission technology. The signals are transmitted via a two-inch
antenna and the device is also
equipped with a Mini-XLR input jack
for the connection of a microphone
or headset microphone*.
Internal »mic gain control« guaran-
Depending on the battery type,
tees a well-balanced microphone
the CR-711 receiver provides for
signal. The transmitter is equipped
uninterrupted reception for up to
with three frequency channels that
20 hours.
the user can choose from. The
channel selection switch is also the
When the CR-711 receiver is used,
on/off switch.
the CT-711 transmitter has a range
The »power-on LED« flashes to
of approx. 30 metres.
indicate a low battery early.
* Batteries not included
(Order No.: EG4601-0)
28
CR-711
RF receiver with
channel selection
Technical data for the CR-711 receiver
Dimensions (H x W x D): 133 x 65 x 33 mm
Weight: 97 g (without batteries)
Colour: Black
Material: ABS / polycarbonate, impact-resistant, unbreakable
Batteries: 2x AA 1.5 V alkaline batteries,
uninterrupted power supply for approx. 20 h
or 2x AA 1.2 V NiMH rechargeable batteries*,
uninterrupted power supply for approx. 15 h
Recharging times: Approx. 14 to 16 h when using the 2bay charger HC-32
Operating frequencies: 863,000 to 865,475 MHz
Range: 30 metres using the CT-711 transmitter
Stability: ± 0.5 MHz, 0 – 50 °C
FM deviation: 40 kHz ±5 kHz, transmission input at 1 kHz, 2.5 mV
Noise reduction: 50 µS
Noise cut-off:
-100 dB at 6 kHz
RF output: 15 dBm
Response frequency: 500 Hz – 5 kHz, ±3 dB
Distortion: < 2.0 % THD
Signal-to-noise ratio: > 50 dB (± 5 dB) with transmission input at 1 kHz, 2.5 mV
Connections:
3.5-mm jack headphones or
teleloop (Order No.: A-4928-0)
Recharging contacts: Compliant with the HC-32 battery recharger
Certifications: CE, ROHS, WEEE, ETSI EN 301 357-1, ETSI EN 301 357-2
* Batteries not included (Order No.: EG4601-0)
CR-711 portable RF receiver
Order No.: A-4174-0
The portable RF receiver for the
tour-guide system is equipped
with a belt clip; like the transmitter,
the enclosure is made of impactresistant plastic and has a connection jack for mono or stereo headphones. The volume is controlled
by a knob, which is also the on/off
switch. The LED, which lights up
permanently when the device is
switched on, will begin to flash to
indicate a low battery.
Depending on the type of battery
used, the CR-711 receiver provides uninterrupted reception for
up to 20 h.
In combination with the CT-711
The earphones, headphones or a teleloop can be connected via the 3.5-mm audio
output. As an alternative to the portable transmitter, there is also a transmitter for
stationary installation (see next page), Order No.: A-4171-0.
tour-guide transmitter, the CR-711
receiver guarantees reliable reception over a distance of approx. 30
metres.
29
CT-800
Radio transmitter in
stand enclosure, range
up to 120 metres
Suitable areas of application:
Churches,
assembly halls
Schools and other
educational facilities
Theatres, spectator
and viewer rooms
»CT-800« transmitter
Order No.: A-4171-0
The CT-800 RF transmitter transmits
the speaker’s voice, a music program
or the signals from any other audio
source wirelessly over a distance
of up to 120 m.
Conference and
Installation and operation of the
meeting rooms
transmitter are convenient and
Open-air events,
easy – »plug & play«: connect the
e.g. open-air theatres
microphone or audio system to the
XLR(F) or 6.3 mm plug, switch on
the transmitter – and the system is
ready to go. An LCD display guides
the user through the menu.
The CT-800 operates on three frequency channels: 863.250 / 863.750
and 864.750 MHz. This means that
it is also possible to transmit up to
Technical data
Dimensions (H x W x D): 4.6 x 21.8 x 21.8 cm
Weight:
1,320 g
Colour: Black
Power supply: AC: 100 to 240 V AC, 50-60 Hz, 400 mA
DC: 12 to 13 V DC, 800 mA
Temperature range: 0 °C to 40 °C (storage temperature: -20 °C to 70 °C)
Operating frequencies: Channel 1 = 863.250 MHz / Channel 2 = 863.750 MHz,
Channel 3 = 864.750 MHz
RF output: 5 to 10 dBm
Stability: ±0.5 MHz (0 °C to 40 °C)
FM deviation: 45 kHz (transmission input, L+R, 1 kHz, 0.5 V RMS)
Noise reduction: 50 µsec
Range: Up to approx. 120 metres (for CR-711 receivers)
Response frequency: LINE-IN: 25 to 10.1 kHz ±3 dB
MIC-IN: 110 to 8.5 kHz ±3 dB
Signal-to-noise ratio (1 kHz): LINE-IN: > 50 dB
MIC-IN: > 40 dB
THD + noise (1 kHz):
LINE-IN: < 0.4%
MIC-IN: < 0.5%
Audio processing: 2:1 compression (LINE or MIC-IN)
Audio inputs: LINE: mono, RCA plug (2x)
MIC: Combo XLR (3-pin; F) or 6.3-mm-TRS plug.
Audio level: (for FM deviation) LINE-IN: 0.5 V RMS (-6 dBV)
Microphone input: 10 V RMS (-40 dBV)
Common mode rejection:
MIC-IN: > 22 dB at 1 kHz
Antenna: 22.9 cm long, flexible, adjustable, removable
Certifications:
CE, ROHS, WEEE, ETSI EN 301 357-1, 2
three different languages, which the
listeners using the CR-711 receiver
metres, the transmitter is able to provide even large venues with audio
(see p. 29) can select as they wish.
signals, from conference rooms to lecture halls and from open-air stages
The CT-800 transmits one channel
only. To transmit three different
languages, it would be necessary
to use three CT-800 devices.
With a range of more than 100
30
right on up to sport arenas.
Accessories for system CT
Plug-in microphone MC-16
Order No.: A-4947-0
Technical data
Microphone type: Condenser
Sensitivity: -60 dB (0 dB=1 V/Pa at 1 kHz)
Output impedance: 1 kΩ at 1 kHz
Directionality: Unidirectional
Frequency response: 80~16,000 Hz
Operating voltage: 1.5~10 V
Power consumption: ≤0.5 mA
Signal-to-noise ratio: ≥ 60 dB
Connector: mini-XLR
Weight: 20 g
Headset MC-72
Order No.: A-4954-0
Technical data
Microphone type: Condenser
Sensitivity: -46 dB (0 dB=1 V/Pa at 1 kHz)
Output impendence: 2.2 kΩ at 1 kHz
Directionality: Unidirectional
Frequency response: 100~18,000 Hz
Operating voltage: 1.0~10 V
Connector: mini-XLR
Weight: 26 g
Dual charging station HC-32
(not depicted)
Order No.: A-4945-0
Technical data
Power supply: 9 V DC 2.2 A
Charging time: maximum 12 hours
Idle current: 14 mA ±5 mA
Protection and control:
Fitted in CR-711/CT-711
Operating temperature range:
0 -55°C on cell surface
Suitable batteries:
Only use NiMH rechargeable batteries
Display: Red LED : Current
Device per charger bay: 1
Size (mm): 120 x 100 x 74
Weight: 135.6 g
Housing: ABS plastic
Case HC-330
Order No.: A-4188-0
Technical data
Power supply: 18 V DC 2.7 A
Charging time: maximum 12 hours
Idle current: 14 mA ±5 mA
Protection and control:
Fitted in CR-711/CT-711
Operating temperature range:
0 to 55°C on the cell surface
Suitable batteries:
Only use NiMH rechargeable batteries
No. of charger bays: 30
Size (mm): 542 x 372 x 235
Weight: 5.9 kg
Housing: Aluminium
Case HC-316
Order No.: A-4187-0
Technical data
Power supply: 6.5 V DC 3.1 A
Charging time: maximum 12 hours
Idle current: 14 mA ±5 mA
Protection and control:
Fitted in CR-711/CT-711
Operating temperature range:
0 to 55°C on the cell surface
Suitable batteries:
Only use NiMH rechargeable batteries
No. of charger bays: 16
Size (mm): 467 x 333 x 188
Weight: 3.1 kg
Housing: Aluminium
31
Mobile transmission
system with large
range transmitter
Transmitter SPL-32T
Thanks to its range of up to 90 metres, the mobile audio radio system
can be used for a large number of
applications - from tours guides in
building through to presentations
Application features:
and demonstrations.
Audio transmission system
for mobile and
There are two respective transmit-
stationary or combined applications
ters available for mobile and sta-
Simultaneous selective
tionary applications: the compact
transmission of different languages
portable transmitter SPL-32T with
(32 channels)
a range of approx. 90 metres and
Clear sound even in noisy
the stationary transmitter WT-1600
environments or in other difficult
(page 34) with a range of about
acoustic situations
250 metres. The mobile receiver,
Easy application
SPL-32R, is used in combination
All function and operating states
are displayed in plain text on the
LCD display
High resolution setting of the
microphone amplifier
with the two transmitters.
The system has 32 channels thereby also allowing simultaneous
Technical data: Sender SPL-32T
HF-carrier frequency:
UHF 863-865 MHz (depending on country in which it is used)
Vibration type:
PLL synthesizer
Frequency stability
± 0.005 % (0 - 50 °C)
Display:
96x64 Dot matrix- LCD-Display
Configurable channels: 32
Switching bandwidth:
20 MHz
Configurable steps: 625 kHz
Modulation:
± 45 kHz deviation (nominal)
RF output:
10 mW / 20 mW
Antenna:
1/4-wave point, flexible (or application-specific,
microphone cable serves as antenna)
Harmonic suppression: > 50 dB
Microphone input:
Asymmetric, 3.5-mm connector
Line-input: Asymmetric, 3.5-mm connector (Ring)
Gain-control range: Programmable in 31 levels, -10 dB to +20 dB
Max. microphone
input level: -10 dB to +20 dB (Gain: -10 dB to +20 dB)
Max Line Input Level: 0 dB
Power supply: Integrated lithium-ion-polymer battery 3.6 V/450 mAh
Battery life: 10 hours (HF-Output 10 mW)
Dimensions (HxWxD): 69 x 42 x 14 mm
Unit weight:
Less than 50 g (with battery)
Operating temperature: -10 °C to +60 °C
Housing: Metal-aluminium alloy
multilingual transmission. The
audio logical signal processing
effectively highlights the speech
frequencies above any interfering
ambient noise.
Mobile radio transmitter SPL-32T
Order No.: A-4180-0
The speaker clips the mobile
antees that the microphone signal
is balanced.
radio transmitter SPL-32T with its
The rechargeable battery in the
integrated microphone to his/her
device allows an uninterrupted
clothing. The transmitter has a 3.5
operating time of approx. 10 hours.
mm input socket for connection
The display shows the respective
of any additional microphones or
charging status.
microphone-headsets.
32
An interne »mic gain control« guar-
Receiver SPL-32R
Technical data
HF-carrier frequency:
UHF 863-865 MHz (depending on country)
Vibration type:
PLL synthesizer
Frequency stability
± 0.005 % (0 - 50 °C)
Range:
approx. 90 m (depends on environment)
Display:
96x64 Dot matrix-LCD-Display
Configurable channels: 32
Switching bandwidth:
20 MHZ
Tunable steps:
625 kHz
Sensitivity:
2 uV (60 dB S/N)
Antenna:
Headphones cable (or conventional 1/4 λ flexible)
Noise squelch:
RF-Noise squelch / digital noise squelch: PilotOne
Audio-output:
3.5-mm connector
Audio-output:
100 mW Maximum, 16 levels digital
Minimum load impedance:16 Ω
Power supply:
integrated lithium-ion-polymer battery 3.6 V/450 mAh
Operating time:
approx. 11 hours (depending on volume)
Dimensions:
69 x 42 x 14 mm
Weight:
Less than 50 g (with battery)
Operating temperature: -10 °C to +60 °C
Mobile radio receiver SPL-32R
Order No.: A-4182-0
The listener clips the mobile radio
receiver SPL-32R to his/her clothing. An LCD display shows all functions in plain text for easy operation.
The loudspeaker can be regulated
via 16-level setting.
Like the transmitter, the Housing is
made of impact-resistant plastic.
Its sturdy construction also ensures
the durability of the system.
The receiver has a connection
socket for various hearing components, e.g. headphones, earphones
or neck loops for inductive audio
transmission to correspondingly
equipped hearing aids or CI systems.
Depending on the set volume,
the mobile receiver SPL-32R can
receive continuously for up to 11
hours. The range is around 90
Earphones, headphones or a neck loop are connected via a 3.5-mm audio output.
There is also a transmitter for stationary applications available as an alternative to the portable transmitter (see next page)
metres depending on the ambient
conditions.
33
WT-1600
Transmitter the freestanding enclosure
Application features:
Transmitter in a free-standing
Housing to supply signals within large
event locations
Availability and selective use of
32 channels
ON/OFF function for the
microphone phantom power
Transmitter »WT-1600«
Order No.: A-4181-0
The stationary radio transmitter
WT-1600 transmits the voice of a
speaker or the signals of another
audio source wirelessly over a distance of up to approx. 250 metres.
Quick mute function
The functions and status informa-
Monitoring via headphones
tion is shown in plain text in the
Password-protected operator access
128x64-Dot matrix OLED display
Function and operating status
displayed in plain text on the
OLED display
to facilitate operation.
Due to the fact that 32 channels
are available, the transmitter can
also service several user groups in
parallel/simultaneously. The display
shows the respective user groups,
the selected language, the channel
and the frequency.
Technical data
HF-carrier frequency:
Vibration type:
Frequency stability
Display:
Configurable channels:
Switching bandwidth:
Configurable steps:
Modulation:
HF-Output:
Antenna:
Harmonic suppression:
Microphone-input:
Line-input:
Phantasm voltage: Mic Gain control range:
Max Mic Input Level:
Max Line Input Level:
Max AUX Input Level:
Monitoring output:
Power supply:
Current:
Dimensions (WxHxD):
Weight:
Operating temperature:
Range:
Housing:
UHF 863-865 MHz (depending on country in which it is used).
PLL synthesizer
± 0.005% (0 - 50 °C)
OLED-128x64 Dot matrix-Double Color
32
40 MHz
25 kHz
FM ± 45 kHz deviation (nominal)
1 mW, 10 mW, 100 mW (depending on country)
External antenna, BNC
> 50 dB
Two XLR-1/4 „symmetric MIC-input
Two XLR-1/4 „symmetric line-inputs, a cinch asymmetric input
48 V DC (on / off)
+20 DB max (can be harmonised)
10 dBu
10 dBu
10 dBu
1/4 “asymmetric, 800 m W / 63 Ω
12-15 V DC / 1 A
25 mA max. (Normal RF Power)
217 x 45 x 180 mm
1.3 kg
-20 °C - 70 °C
100 - 250 m (depends on environment)
Metal
Two symmetric inputs allow the
direct connection of two microphones; there is an asymmetric
Thanks to a range of up to 250 metres, the transmitter WT-1600 also sup-
input for signal input from other
plies signals to large event locations, such as lecture halls, open-air stages
audio sources.
through to sports arenas, in an excellent audio signal quality.
The channel selection flexibility
offered by the system means that
several languages can be transmitted in parallel and received
selectively.
34
Accessories for system SPL
Necktie microphone SA-110
Order No.: A-4942-0
Technical data
Directionality: Unidirectional
Frequency response: 50~18,000 Hz
Output impedance: ≤680 Ω
Sensitivity: -48 ±2 dB
Operating voltage: 2 V~10 V
Microphone core dimensions
Ø 9.7 x 5.2 mm
Cable length: 1.0 m
Connector: 3.5 mm plug
(Peak=hot Ring=cold Shield=Brass)
Headset SA-120
Dual charging station SC-02A
(not depicted)
Order No.: A-4929-0
Order No.: A-4186-0
Charging case for up to 32 trans-
Charging station for 2 transmitters
mitters or receivers SPL-32T or
or receivers SPL-32T or SPL-32R.
SPL-32R.
Technical data
Input socket: MINI USB 5Pin
Power supply: 5 V / 1 A
Output: 4.2 V / 300 mA
Charging time: 2 hours
Dimensions: 45 x 33 x 113 mm
Weight: 40 g
Adapter
Power supply:
100-240 V AC 50 / 60 Hz 0.2 A
Output voltage DC 5 V / 1 A
Technical data
Charging time: 4 hours
Dimensions: 52 x 34 x 14 cm
Order No.: A-4941-0
Technical data
Directionality: Unidirectional
Frequency response: 50~18,000 Hz
Output impedance: ≤680 Ω
Sensitivity: -48 ±2 dB
Operating voltage: 2 V~10 V
Microphone core dimensions
Ø 9.7 x 5.2 mm
Cable length: 1.0 m
Connector 3.5 mm plug
(Peak=hot Ring=cold Shield=Brass)
Case SC-32AD
Headphones SA-51
Order No.: A-4943-0
One-sided headphones
SA-211
Case SC-24AD
Order No.: A-4185-0
Charging case for up to 24 transmitters or receivers SPL-32T or
SPL-32R.
Technical data
Charging time: 4 hours
Dimensions: 52 x 34 x 14 cm
Order No.: A-4944-0
Technical data
Material: Soft rubber cover
Loudspeaker diameter: Ø 25 mm
Frequency response: 50~18,000 Hz
Sensitivity: 90 dB/mW at 1 kHz
Impedance: 16 Ω
Cable length: 0.9 m
Output connector: 3.5 mm plug
Colour: black
Neck strap SA-91
Order No.: A-4946-0
Technical data
Length: 50 cm
35
The percentage of people
handicapped people in a general
The equal treatment of the dis-
with impaired hearing is on the
way, without any particular difficulty
advantaged and minorities has,
increase.
and without necessitating the help
however, now become a central
of third parties.«
concern of the European Union
The demographic shift in age has
Accessible sound:
Greater independence
in public life for
people with hearing
disabilities.
had a decided impact on this de-
Needless to say, the term acces-
velopment. Hearing loss – even if
sibility also includes the access of
only slight – can now be detected
the hearing impaired to acoustic
in every fourth 50- to 59-year-old.
information – starting with such
Among people over 70, the number
elementary sounds as alarms and
who are hard of hearing is already
emergency signals to educational
considerably higher at more than
information and communications
fifty percent – with significantly
and right on up to acoustic par-
greater hearing loss. The percent-
ticipation in cultural and sporting
age of people in these age groups
events.
is also expected to increase in the
future.
Even contemporary hearing aids
are not able to guarantee good
Right to participation in
hearing and clear understanding
cultural life
in every situation. In noisy environ-
This so-called »50plus Generation«
is very active in shaping public
life. They represent a group with
considerable purchasing power,
take advantage of a comprehensive
range of cultural offers and use all
contemporary media. And they
also demand – quite justifiably –
unlimited access to information and
ments or in rooms with extreme
resonance or echoes, for example,
these systems often quickly reach
their limits. That’s why audio transmission systems that effectively
include or supplement hearing aids
are now often used, particularly in
places where interruption-free communication is important.
communication – which constitutes
These systems feed the sound
acoustically accessible infrastruc-
either directly into a hearing aid or
tures in the broadest sense.
a CI system or make it available to
the user via special receivers.
The accessible design of public
and private infrastructures
The German law for the equality of
National laws on equality and
their implementation
disabled persons (BGG) defines
The application of equality guide-
accessibility as follows: »Buildings
lines (anti-discrimination laws) is
and other facilities, means of trans-
as diverse as the cultural attributes
port, technical apparatus, systems
of the individual European states.
for information processing, acous-
While far-reaching measures en­
tic and visual sources of information
abling equal treatment are already
and communication facilities as well
common in France, the Nether-
as all other areas of life are acces-
lands, Great Britain and Scandi-
sible when they are useable by
navian countries, for example, the
provision of accessible infrastructures is lagging behind in other
countries – as in Germany.
36
(EU Basic Treaty). In this respect,
the consistent implementation of
accessible infrastructures – particularly in government offices,
but also in restaurants, at event
venues and in public transportation
systems – will only be a question of
time for all EU nations.
Europe’s self-image
The EU appeals to all its member
states to not discriminate against
anyone because of his/her personal
situation. Article 26 of the Charter of
Fundamental Rights of the European Union, for example, reads: »The
Union recognises and respects the
right of persons with disabilities to
benefit from measures designed to
ensure their independence, social
and occupational integration and
participation in the life of the community.«
Technical solutions for
The table (below) provides a brief
components, list their main techni-
accessible sound
overview of the main selection
cal data and provide you with as-
criteria.
sistance in making your purchasing
In addition to building acoustics
decisionl.
and electro-acoustic public ad-
The main advantage of all these sys-
dress systems (DIN 18041), the
tems is that the sound is delivered to
Special skills or knowledge are often
following systems can be used for
the listeners in a pure, undistorted
required in the planning, project
a significantly higher proportion of
form that is not influenced by the
development and installation of
direct sound:
distance of the listeners to the
sound transmission systems. That’s
sound source or by any annoying
why we offer system operators and
background noise in the room.
architects a comprehensive con-
Induction loop systems
Infrared transmission systems
Radio-frequency transmission
systems
In order to ensure that the listening
sulting and services package in this
AUDIOropa provides
field. From qualified information to
a comprehensive range of
competent support in the planning
assistive listening services.
process and right on up to the
systems provided are effective, it is
The AUDIOropa program is struc-
installation and first-time operation
important to compare the require-
tured in a cross-system manner
of the system, we will accompany
ments of the venue and its architec-
and includes components and the
you every step of the way with our
tural features with the properties of
complete range of accessories
consulting services to ensure the
the transmission systems early in
for transmission systems using
effective implementation of your
the decision-making process.
all three of the physical principles
professional audio transmission
mentioned here. The following
system.
AUDIOropa
offers a compre­hensive
package of technology,
consulting and services
for the professional use
of audio transmission
systems.
pages will present the technical
A comparison of systemsInduction
InfraredRadio-frequency
using different physicalloop
transmissiontransmission
transmission principlessystems
systemssystems
Small to medium-sized conference rooms
Partial provision, e.g. information counters, reception areas, living areas
Cinemas (particularly multiplex cinemas)
*
Courtrooms (data confidentiality), conference rooms
City centres (high radio-frequency emissions)
Auditoriums, theatres
Schools and universities
*
Stadiums, sport arenas
**
Churches
Open-air applications
**
Direct reception in the hearing aid (without a special receiver)
Tour-guide systems available
Locally limited reception range
*
Not susceptible to electromagnetic interference
Interference-free parallel operation in neighbouring rooms
*
Portable systems available
Excellent sound quality
Several channels available
Service provided for very large areas/large range
Easy installation
Inexpensive components and installation
Inconspicuous transmitter positioning (aesthetics)
Transmitter and receiver do not require direct line of sight
Optimally suited or
applicable
Limited suitability
(depending on details
of set-up) or limited
applicability
Suitable in exceptions
or hardly applicable
* For use of low-overspill systems (LOS) – ** Service provision in partial areas (selected seat rows/blocks)
37
Keyword list
A
H
Accessible sound................................................ 36
Headphones.................................................. 22; 35
Aluminium case............................................. 14; 25
Headset............................................................... 31
Audio coverage of large areas...................... 27; 37
High-performance infrared transmitter................ 20
Automatic Gain Control
(AGC).................................. 8; 9; 11; 12; 13; 15; 22
B
Battery........................................................... 14; 24
C
I
Induction loop amplifier..................................6 - 12
Induction loop Cross-the-counter.......................... 7
Induction loop kit................................................... 6
Induction loop pad.......................................... 7; 15
Carrier frequencies.............................................. 17
Induction loop receivers...................................... 13
Case............................................ 14; 21; 25; 31; 35
Induction loop system............................... 6; 11; 12
Charger..................... 13; 14; 21; 22; 24; 25; 31; 35
Infrared receivers.......................................... 21; 22
Cinch (RCA)........................................ 7; 15; 20; 34
L
CI system......................................... 4; 6; 22; 28; 33
LA-60..................................................................... 7
Coaches................................................................ 6
LA-90..................................................................... 6
Condenser microphone................................... 5; 31
LA-240................................................................... 6
Conducting material.............................................. 5
LOS installations.................................................. 10
Copper ribbon cable........................................... 15
Low-overspill systems (LOS)............................... 10
Crescendo 50...................................................... 13
LPU-1................................................................... 13
CT-800................................................................. 30
CT-711 / CR-711............................................ 28; 29
D
M
Magnetic field............................................ 4; 10; 15
Directional sensitivity........................................... 10
Measuring device for
induction loop systems........................................ 15
Dynamic microphones.......................................... 5
Microphone EH1205.............................................. 7
E
Earpieces...................................................... 13; 21
EH1205.................................................................. 7
Electret microphone.............................................. 5
Emergency signals.............................................. 36
Multi-channel operation................................. 17; 31
N
National laws....................................................... 36
O
Overspill............................................................ 5; 9
P
Equality of disabled persons
law (BGG)............................................................ 36
Plastic tray..................................................... 14; 25
Equality................................................................ 36
PLL microphone............................................ 15; 23
European standards.............................................. 4
Plug-in microphone............................................. 34
European Union................................................... 36
Pocket transmitter................................................ 27
Extraneous light................................................... 20
Portable 3-channel radio-frequency
F
transmission system…………….......................…28
Field strength reduction ..................................... 10
Portable induction loop systems........................... 6
Function of an induction
loop system........................................................... 4
Portable radio-frequency
receiver CR-711.................................................. 29
G
German equality of disabled
persons law (BGG).............................................. 36
Portable radio frequency
transmitter CT-711............................................... 28
PRO IR-202.......................................................... 18
PRO IR-400.......................................................... 20
PROLOOP C.......................................................... 8
PROLOOP DCCplus.............................................. 9
38
PROLOOP FSMplus............................................ 15
Keyword list
PROLOOP LOS................................................... 12
PROLOOP LOSplus............................................. 11
PR-22+................................................................ 13
R
Radio-frequency receiver CR-711....................... 29
Radio frequency transmitter CT-711.................... 28
Radio-frequency transmission systems.............. 26
Radio-frequency transmitter................................ 28
Ranges................................................................ 26
RCI-102............................................................... 21
Reception range.................................................. 17
Rechargeable/replacement
battery..................................................... 14; 24; 33
Recharger.................. 13; 14; 21; 22; 24; 25; 31; 35
S
Silicone earpieces......................................... 13; 21
S/PDIF Audio converter................................. 13; 24
Standards.............................................................. 4
T
Telecoil................................................................... 4
Teleloop................................................... 16; 19; 33
U
UHF101 (wireless microphone) .......................... 23
UHF401 (wireless microphone)........................... 23
Under-the-chin receiver................................. 13; 21
W
Wireless microphone........................................... 23
WT-1600............................................................... 34
X
XLR...................................... 8; 9; 11; 12; 23; 30; 34
XLR connection cord........................................... 15
39
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