Short definition
An induction loop system (hearing loop) wirelessly transmits sound via a magnetic field directly to hearing aids with a T-coil – an important accessibility tool.
Detailed explanation
With an induction loop system, an audio signal is converted into a magnetic field via a wire loop laid around the room. Wearers of hearing aids and cochlear implants switch their device to the telephone or T-coil setting and receive the sound directly, clearly, and without disruptive room reverberation – with no extra receiver or headphones needed.
The big advantage is inclusion: people with hearing aids can hear speakers and, where applicable, interpretation with the best possible intelligibility. Many public buildings and assembly venues have such hearing systems planned or required. Technically, careful planning is needed – loop routing, field strength, and avoiding interference fields must all be right, and neighboring loops must not overlap.
Relevance in this subject area
The induction loop system makes events accessible for people with hearing impairments. It complements language distribution with an accessible reception option – often a legal requirement.
Practical example
A hearing loop is installed in a meeting hall. A participant with a hearing aid switches to the T-coil setting and hears the speaker and interpretation directly in their hearing aid – with no additional device.
Related terms
Transmission technology, Receiver (conference receiver), Portable guide system (PGS), Meeting technology, Event technology