Hearing loops consist of a thin strand of copper wire radiating magnetic signals, that can be picked up by a tiny receiver already built into most hearing aids and cochlear implants.  When the receiver is turned on, the hearing aid receives only the sounds coming directly from a microphone, not the background noise.

WHAT IS A HEARING LOOP VIDEO

Video courtesy of Ampetronic

Below is the universal symbol for Hearing Loop.  The “T”, signifies an available telecoil compatible system is in place at the venue.