Anyone have experiences with Audio Induction Loops?

Summary

Assistive listening technology A sign in a railway station to indicate a "Hearing Induction Loop" is available to receive public address system messages through hearing aids with a "T" switch. An audio induction loop system (also called an audio-frequency induction loop or AFIL, or a hearing loop[1]) is an assistive listening device for individuals with reduced ranges of hearing.[2] The first patented magnetic induction loop communication system was invented by Joseph Poliakoff (grandfather of Sir Martyn Poliakoff) in Great Britain in 1937.[3][4][5] The pickup coil in a hearing aid is known as a telecoil (or T-coil) because its early form was to pick up a magnetic field from coils within a telephone. These were included as a part of the method of enabling a two-way conversation over a single pair of wires. The telecoil enabled the hearing aid user to hear the phone conversation clearly without picking up background noise. From this, the natural development was to generate electromagnetic fields representing the audio, which the telecoil could receive. A hearing loop consists of one or more physical loops of cable which are placed around a designated area, usually a room or a building. The cable generates an electromagnetic field throughout the looped space which can be picked up by a telecoil-equipped hearing aid, a cochlear implant (CI) processor, or a specialized hand-held hearing loop receiver for individuals without telecoil-compatible hearing aids. The loops carry baseband audio-frequency currents; no carrier signal is used. The benefit is that it allows the sound source of interest – whether a musical performance or a ticket taker's side of the conversation – to be transmitted to the hearing-impaired listener clearly and free of other distracting noise in the environment.[6] Typical installation sites include concert halls, ticket kiosks, high-traffic public buildings (for PA announcements), auditoriums, places of worship, courtrooms, meeting rooms, and homes....