Sennheiser infrared systems are ideal for wireless, interference-free secure assistive listening and interpretation for theatres, houses of worship, courtrooms, conferences and much more!
Sennheiser Infrared Assistive Listening Systems
With their unique amplitude and frequency modulation process, Sennheiser infrared systems offer high-quality, dependable audio with single, dual or stereo operation. Sennheiser IR systems can be modelled in EASE design software. Sennheiser IR systems are ideal for single-channel systems for assistive listening or two-channel language translation systems. Care must be taken to consider the room’s dimensions and layout (including balconies and side rooms). Consider an infrared emitter as a light source. Panels must be selected in the appropriate size and quantity as per the square footage of the room in which the system will be used. Sennheiser emitter panels all contain the ability to daisy chain multiple panels together to cover wide or odd-shaped rooms.
Sennheiser offers the ability to mount emitters on a variety of ceiling or wall mounts. Smaller emitters such as the SZI30 can even be assembled in an array to create a longer throw or wider spread of the IR beam. When selecting an appropriate position for your emitters, keep in mind that they should be placed in a manner to provide even illumination throughout the room. They should be mounted high (generally 10-14 ft.) pointing down towards those wearing receivers. If emitters are placed on both sides of an altar they should be aimed diagonally across the room. Except in rare occasions, any number of panels can be placed in a room without concern of interference between panels.
The main components of an IR System:
- Modulator – Audio Frequency to Radio Frequency
This part of the system is comprised of a rack-mounted device that will receive audio signals from the Public Address or sound system. Audio signals are superimposed onto a carrier frequency and travel by coaxial cable to the Emitter.
- Emitter – Radio Frequency to Infrared Light
This device and its wall or ceiling mounting hardware are placed in the room where assistive listening is needed. The signal from the Modulator is converted to invisible light by the emitter’s LEDs. This transmits the audio signal to the Receiver.
- Receiver – Infrared Light to Audio Frequency
The receiver section is comprised of a stethophone (headset worn under the chin) or a bodypack receiver with headphones, its rechargeable battery and the battery charger. Here the light from the emitters is converted back to sound for the listener.
- Transmitter – Audio Frequency to Infrared Light
For smaller rooms or portable applications, Sennheiser offers transmitters that combine a modulator and emitter into one device. Here audio frequencies are converted to infrared light directly. Some transmitters facilitate simple set-ups for small boardrooms. Other transmitters include features that make temporary installations simpler.