Hearing devices may also be rated. Your
hearing device manufacturer or hearing
health professional may help you find
this rating. Higher ratings mean that the
hearing device is relatively immune to
interference noise. The hearing aid and
wireless phone rating values are then
added together. A sum of 5 is considered
acceptable for normal use. A sum of 6 is
considered for best use.
In the above example, if a hearing
aid meets the M2 level rating and the
wireless phone meets the M3 level rating,
the sum of the two values equal M5. This
should provide the hearing aid user with
“normal usage” while using their hearing
aid with the particular wireless phone.
“Normal usage” in this context is defined
as a signal quality that is acceptable for
normal operation.
The wireless telephone industry has
developed a rating system for wireless
phones, to assist hearing device users
find 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
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 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.
SAFETY AND
WARRANTY
FCC HEARING-AID
COMPATIBILITY (HAC)
REGULATIONS FOR
WIRELESS DEVICES
FCC HEARING-AID
COMPATIBILITY (HAC)
REGULATIONS FOR
WIRELESS DEVICES
SAFETY AND
WARRANTY
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