The very basics of an induction loop system is a length of wire connected to an induction loop amplifier that is connected to a sound source, usually a microphone. The telecoil, in the hearing instrument, picks up the sound.
Induction Loops are also known as AFILS, Audio Frequency Induction Loop Systems, Hearing Loops and even Loops.
An Induction Loop is, at this moment, is still the most freely available assistive technology for people with hearing aids, cochlear implants and Bone Attached Hearing Aids.
Take a look at this video "How does a Hearing Loop work (induction loop, T-loop or AFILS to assist people with hearing loss?"
Please note the video is the property and copyright of Ampetronic Ltd and cannot be used or reproduced without their express written consent.