Transmission technology

To transmit acoustic signals from one place to another, they are converted into electrical signals. These can then be processed, amplified and distributed to be converted back into acoustic signals at their "destination".

If we consider an infrared interpreter system, a transmission takes place as follows:

The interpreter's words are converted into electrical signals via a microphone. These are fed to an infrared transmitter via a control center as well as being made available to other interpreters for listening in the case of multilingual events. The IR transmitter converts the low-frequency signals into high-frequency signals and feeds them to infrared emitters. These in turn convert the high-frequency signals into optical signals and illuminate a room with infrared light. With an IR receiver, which each listener can handle freely, the infrared signals are converted into low-frequency electrical signals and then back into acoustic signals with an earphone.