This from Cronkite News.
…these places have created an electro-magnetic loop with wire around the perimeter of the room, connected to an amplifier and the public address system. When a person with a hearing aid flips a tiny switch to the telecoil setting, he or she can hear what’s being said into the microphones without any background noise.
Here’s the link to the page:
This appears to use inductive technology – the same concept that makes a transformer work. Essentially, the building in which you’re sitting becomes the primary winding, and the coil in your hearing aid, the secondary.
It represents a major step forward in providing access to HoH individuals who can benefit from hearing aids.
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