An induction loop or hearing loop is a type of Hearing Assistive Technology (HAT)/Assistive Listening Device (ALD) that works in conjunction with hearing instruments (hearing aids) and cochlear implants (CI). Hearing loops pick up the intended signal (music or speech) via a microphone and transmit the signal wirelessly to hearing instruments and cochlear implants. Individuals who use hearing instruments and cochlear implants switch their instruments to T coil mode to receive the signal. While in T coil mode, the listener hears the intended signal that is transmitted directly to the hearing instrument or cochlear implant from the hearing loop. The hearing loop provides a clear signal to the listener that is not degraded by distance, background noise and reverberation.
How does this work?
The Hearing Loop is a type of copper wire that encircles a room, connects to a loop (sound) amplifier, which is then routed to a microphone, TV, or PA system. The loop transmits a wireless signal that is picked up by the telecoil which is included in modern hearing aids and all cochlear implants. When they are set to the T (telecoil) setting, this system provides a clarity to the listener that simply doesn’t exist when users have to rely solely on their hearing instruments. With a certified Hearing Loop System installed, the loop user’s telecoil functions as an antenna, relaying sounds directly into the ear with out the background noise—just like Wi-Fi connects people to the Web.
