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User Guide 5
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 Communications Inc.
www.kyocera-wireless.com
To purchase accessories, visit
www.kyocera-wireless.com/store