You might already be familiar with infrared technology when you use your TV remote control.
Similarly, an Infrared (IR) Assistive Listening system utilizes light-based technology.
An IR system involves feeding sound from the source into an infrared emitter. Emitters transmit sound via harmless infrared light. A receiver then picks up this infrared light, where it again becomes sound that can be amplified at will by the listener. Headphones, neckloops, or earbuds attach to the receivers, depending on the individual needs of the listener.
Some emitters are very small, such as those used for listening to the television; others are quite large and require professional installation and/or custom support.
To use an infrared system, you need to have a direct line of sight.
The photo shows a ceiling-mounted IR emitter.
