standard for compatibility of digital wireless phones with
hearing aids is set forth in American National Standard
Institute (ANSI) standard C63.19. There are two sets of
ANSI standards with ratings from one to four (four being
the best rating): an “M” rating for reduced interference
making it easier to hear conversations on the phone when
using the hearing aid microphone, and a “T” rating that
enables the phone to be used with hearing aids operating
in the tele-coil mode thus reducing unwanted background
noise.
HOW WILL I KNOW WHICH WIRELESS PHONES ARE
HEARING AID COMPATIBLE?
The Hearing Aid Compatibility rating is displayed on the
wireless phone box.
A phone is considered Hearing Aid Compatible for acoustic
coupling (microphone mode) if it has an “M3” or “M4” rating.
A digital wireless phone is considered Hearing Aid
Compatible for inductive coupling (tele-coil mode) if it has a
“T3” or “T4” rating.
HOW WILL I KNOW IF MY HEARING AID WILL WORK
WITH A PARTICULAR DIGITAL WIRELESS PHONE?
You’ll want to try a number of wireless phones so that you
can decide which works the best with your hearing aids.
You may also want to talk with your hearing aid
professional about the extent to which your hearing aids
are immune to interference, if they have wireless phone
shielding, and whether your hearing aid has a HAC ratio.
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