Induction Loop Systems
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Induction loop systems are most common in large group areas. They can also be purchased for individual use.
Induction loop systems work with hearing aids. An induction loop wire is permanently installed (typically under a carpet or in the ceiling) and connects to a microphone used by a speaker. The person talking into the microphone generates a current in the wire, which creates an electromagnetic field in the room. When you switch your hearing aid to the "T" (telecoil/telephone) setting, your hearing aid telecoil picks up the electromagnetic signal. You can then adjust the volume of the signal through your hearing aid.