Sennheiser Infrared System

Infrared

Sennsis RI 150 recievers in charging racks

Sennsis IR-400w Infra-red radiator with UHF radio microphone receiver fitted and DC input modification (up to 400 square meter coverage)

Sennsis RI-150 LL infra red induction loop receiver

Sennsis SZI 1015-TW white infra-red radiator mounted on wall

1. The input to an infrared system can be interpreter’s microphone, a conference/sound system or any other audio system. They all produce an electrical signal which contains the audio information.

2. This signal is fed to the modulator which prepares the audio signal for the subsequent infrared (IR) transmission.

3. This processed electrical signal is then fed to the radiator. The radiator diodes produce the (invisible) infrared light and radiate it into the room.

Within the room the light signal can be received by any amount of wireless receivers.

4. The receiver converts the light signal back into an electrical signal and the receiver’s headphones make it an audio signal again (or an induction loop if used by a hearing aid wearer).

For single channel systems, radiators with in-built modulators are used (like the model shown-right. Please note this is a Sennsis modified version with radio microphone receiver fitted).

For multi channel infrared systems an external modulator is installed which then feeds the radiators via a special cable. A typical example where a 2 channel system is installed is in a council chamber. This system is used to transmit the floor language on 1 channel for hearing impaired people and the other channel for Welsh/English translation. This example is using a wide band infrared system. If more than 2 channels are needed a narrow band infrared system can be installed allowing up to 32 channels.

Receivers are available in 3 types. A stethoset, an neck worn induction loop and a belt worn version used with headphones (the belt worn version is only used in narrow band applications).

The stethoset and neck loop versions are lightweight (only 45g), comfortable to wear and easy to use. The stethoset has arms with soft rubber ends which simply sit in the ears allowing the receiver to hang below the users chin. The user then controls the volume with the on/off/volume control (and channel if selector switch is fitted). The neck loop version is worn around the neck and used with the users hearing aid “T” position. This allows the hearing impaired person to hear directly through their own hearing aid. For an overview of infrared receivers-click here!

All receivers use NiMH accupack rechargeable batteries which are charged in 10 way racks (as seen above).

The easiest way to look at radiators is to think of them as spot lights of invisible light. Radiators are available in different sizes depending on the area of coverage and channels need. From 80 sq.m to a massive 1600 sq.m! In some applications multiple radiators are used to ensure an even coverage of the light so the user doesn’t experience blind spots. With the exception of the smallest model, radiators are available in two finishes. black (as shown above) and white (left).

As well as installing infrared systems, Sennsis builds portable systems built to suit the individual customers requirements. From a simple system to cover a small area with 1 receiver to large multi-channel systems. We also offer a radio microphone option which allows the translator/speaker the freedom to move away the from the equipment so they don’t feel conspicuous sat at the front in a meeting.