guaranteed. 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 this. 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 illustrated above, 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
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