Noun
telecoil (plural telecoils)
A coil of wire included within hearing aids and cochlear implants that responds to electromagnetic signals usually generated by an induction loop.
If the listener does not have a telecoil, then he or she must carry a receiver with an earpiece. Source: Internet
The audio induction loop permits the listener with hearing loss to be free of wearing a receiver provided that the listener has a hearing aid or cochlear implant processor with an accessory called a " telecoil ". Source: Internet