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95
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.
T-Ratings: Phones rated T3 or T4 meet FCC requirements and are likely to
generate less interference to hearing devices than phones that are not labeled. T4
is the better/ higher of the two ratings.
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 example to the left, 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’s acceptable for normal operation.
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