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storage facilities, vehicles using liquefied
petroleum gas (such as propane or butane),
areas where the air contains chemicals or
particles, such as grain, dust, or metal
powders, and any other area where you
would normally be advised to turn off your
vehicle engine.
When your Device is Wet
Do not turn on your device if it is wet. If your
device is already on, turn it off and remove
the battery immediately (if the device will not
turn off or you cannot remove the battery,
leave it as-is). Then, dry the device with a
towel and take it to a service center.
FCC Hearing Aid
Compatibility (HAC)
Regulations for Wireless
Devices
The U.S. Federal Communications
Commission (FCC) has established
requirements for digital wireless mobile
devices to be compatible with hearing aids
and other assistive hearing devices.
When individuals employing some assistive
hearing devices (hearing aids and cochlear
implants) use wireless mobile devices, they
may detect a buzzing, humming, or whining
noise. Some hearing devices are more
128
immune than others to this interference
noise, and mobile devices also vary in the
amount of interference they generate.
The wireless telephone industry has
developed a rating system for wireless mobile
devices to assist hearing device users find
mobile devices that may be compatible with
their hearing devices. Not all mobile devices
have been rated. Mobile devices that are
rated have the rating on their box or a label
located on the box.
The ratings are not guarantees. 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 mobile device
successfully. Trying out the mobile device
with your hearing device is the best way to
evaluate it for your personal needs.
M-Ratings: Wireless mobile devices rated M3
or M4 meet FCC requirements and are likely
to generate less interference to hearing
devices than mobile devices that are not
labeled. M4 is the better/higher of the two
ratings. M-ratings refer to enabling acoustic
coupling with hearing aids that do not operate
in telecoil mode.
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