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Hearing Aid Compatibility (HAC) with
Mobile Phones
Some mobile phones and hearing devices (hearing
aids and cochlear implants), when used together,
result in buzzing, humming, or whining noises
detected by the user.
Some hearing devices are more immune than others
to this interference noise, and phones also vary in the
amount of interference they generate.
The wireless telephone industry has developed
ratings for some of their mobile phones, to assist
hearing device users in finding phones that may be
compatible with their hearing devices. Not all
phones have been rated.
Phones that are rated have the rating on their box or
a label on the box. The ratings are not guarantees
and results will vary depending on the user’s hearing
device and hearing loss. If your hearing device
happens to be vulnerable to interference, you may
not be able to use a rated phone successfully. Trying
out the phone with your hearing device is the best
way to evaluate it for your personal needs.
M-Ratings—Phones rated M3 or M4 meet FCC
requirements and are likely to generate less
interference to hearing devices than phones that are
not labeled. M4 is the better/higher of the two
ratings.
T-Ratings—Phones rated T3 or T4 meet FCC
requirements and are likely to be more usable with a
hearing device’s telecoil (“T Switch” or “Telephone
Switch”) than unrated phones. T4 is the
better/higher of the two ratings. (Note that not all
hearing devices have telecoils in them.)
Hearing devices may also be measured for immunity
to this type of interference. Your hearing device
manufacturer or hearing health professional may
help you choose the proper rating for your mobile
phone. The more immune your hearing aid is, the
less likely you are to experience interference noise
from mobile phones.
For more information about hearing aid
compatibility, visit the FCC's Consumer &
Governmental Affairs Bureau Web site at
www.fcc.gov/cgb/dro.
Kyocera Wireless Corp.
www.kyocera-wireless.com
To purchase accessories, visit
www.kyocera-wireless.com/store