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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