olemus
induktsioonsilmusside antenn kuuldeaparaadis

Wiktionary:
a coil of wire included within hearing aids and cochlear implants that responds to electromagnetic signals usually generated by an induction loop

näiteid
http://www.loopnm.com/T-Coil_cutawy.jpg

https://duckduckgo.com/?q=telecoil&t=h_&iax=images&ia=images

ülevaateid
https://en.wikipedia.org/wiki/Hearing_aid#Telecoil

https://www.hearingloss.org/wp-content/uploads/HLAA-Hearing-Loop-brochure-9.21.pdf