Listen Technologies IR LT-82 User Manual

Don’t miss a single sound. Listen.

Listen Technologies Corporation believes in experiencing
every sound, whether it’s the carefully chosen words of a
presiding judge or the subtleties of expression emanating from an
orchestra’s string section. It’s all a part of the experience, and Listen is
dedicated to making sure every individual hears every sound.

Listen’s line of stationary infrared (IR) products deliver on this promise
by providing a carefully tuned system of products. Listen makes the
process of specifying, ordering, installing, and using the system simple
and straight forward. A Listen IR system  lls the room with non-visible
infrared light. Each receiver detects the IR light and turns it into sound
ensuring every individual can be part of the total experience. Because
it’s light, the IR signal never leaves the room and it cannot be received
out of the room, thereby creating a secure environment with no
concern of eavesdropping.

Don’t miss a single sound. Listen.

Places of Worship

Members of a congregation come to their places of worship looking for words
of encouragement and enlightenment. A Listen system ensures that each
individual can fully enjoy this experience. Using IR technology ensures that only
those within the sanctuary receive the signal.

Performing Art Centers

Imagine going to a theater performance and not being able
to understand all that is being said. A Listen system delivers
high quality sound to every listener in the theater, while
ensuring the performance is not recorded outside of the
main hall.

Classrooms

Studies prove that students learn more when they can hear
well. A Listen system delivers the voice of the instructor
directly to their ears. Because IR signals are isolated to each
room, the same receiver can be used for every classroom
with the same settings. With a radio (RF) signal, the receiver
must be tuned to di erent channels for each room.

Language Interpretation

The key witness in a case is a
student from Brazil and only
speaks Portuguese. A Listen
system delivers an interpreter’s
English version of the testimony
to each of the jurors. Since the IR
light will not leave the courtroom,
the judge is not concerned about

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the testimony being heard outside
of the courtroom.

Listen Stationary IR System

There are three main components involved in the Listen Stationary IR system:

Receiver(s)

The IR light from the radiators is detected by
the receivers and turned into sound. Listen
o ers the LR-42 stethoscope and LR-44
lanyard style receivers. The stethoscope is an
“all-in-one” unit, making it easy to keep track of
checked out equipment. The lanyard receiver
accepts any style of 3.5 mm earphone, giving
users more choices.

Radiator(s)/Emitter(s)

The radiator transforms the RF audio signal from the LT-82
transmitters into an IR signal. This is essentially a
“headlight” that illuminates the room with non-visible IR
light. The size and shape of the room will determine how
many radiators or “headlights” you’ll need to  ll the room
for adequate signal coverage. It’s powered by either the
LT-82 transmitter or an LA-205 extension/replacement
power supply. Hardware for most types of mounting
con gurations, comes standard with each radiator, and
the radiator is available in two colors; grey or white.

Highlights

• Simple to specify, install, maintain, and use.

• Secure – the signal will not leave the room.

• Up to four simultaneous mono or stereo channels allows for expanded applications.

• Uses higher modulation (2.3 to 3.8MHz) frequencies thereby decreasing the risk of
light interference from  uorescent lights and other sources.

• Installation is simple using CAT-5 cables for power distribution.

• The radiator mounting hardware is included with each radiator.

• Users will enjoy the simple but re ned look and feel of both the stetho and

lanyard receivers.

• Advanced battery management ensures long battery life.

• Uses standard AAA alkaline batteries or an optional rechargeable pack (LA-364).

• Compatible with other manufacturers.

• Limited lifetime warranty (radiator – 3 years and accessories 90 days).

Transmitter(s)

The LT-82 Stationary IR Transmitter accepts audio
from an audio mixing console or other sources. It then
turns this audio signal into an RF signal and delivers it
to an LA-140 radiator via coaxial cable. The LT-82 also
provides DC power for up to two LA-140 radiators via
standard CAT-5 cabling. For a single channel system
(mono or stereo) use one LT-82. Add more channels
(up to 4 total) by adding more LT-82 units.

Two cables connect the LT-82 Transmitter to the
radiator(s). CAT-5 cable is used for power, and coaxial
cable is used for the signal. When more than one
radiator is needed, they can be daisy-chained using
the same type of cable. One LT-82 can power up to two
radiators.

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