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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 with 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 contain
telecoils.) The more immune your hearing aid
device is, the less likely you are to experience
interference noise from your wireless phone.
Hearing devices may also be measured for
immunity to this type of interference. Your
hearing device manufacturer or hearing
health professional may help you find results
for your hearing device.
For additional information about the
FCC’s actions with regard to hearing aid
compatible wireless devices and other
steps the FCC has taken to ensure that
