A telecoil is a small copper coil of wire that can be found in over 70% of all hearing aids currently available and in all
cochlear implants. When turned on it receives an electromagentic signal from a hearing loop and sends it through the
digital circuitry of the hearing device where it becomes sound.  This process, in effect, places the mouth of the speaker
using the microphone right next to the user’s ears, providing dramatically improved clarity and intelligibility.