MTA Guide to Accessible Transit
Induction Loops at Station Booths 
MTA New York City Transit has installed Induction Loop Technology at all station booths in Queens, Brooklyn, The Bronx, and Manhattan except in a few stations under construction. The new technology filters out noise for customers who wear hearing aids. Switching your hearing aid or cochlear implant to the T-setting (telecoil) will allow you to hear only the speaker. For more information, visit here.
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