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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 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 have
telecoils in them.)
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. The more
immune your hearing aid is, the less likely you are to
experience interference noise from mobile phones.
FCC regulatory compliance
FCC Regulatory Compliance
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions: (1)
this device may not cause harmful interference, and
(2) this device must accept any interference received,
including interference that may cause undesired
operation.
Your mobile device is a low power radio transmitter
and receiver. When it is ON, it receives and also sends
out radio frequency (RF) signals. In August 1996, the
Federal Communications Commission (FCC) adopted
RF exposure guidelines with safety levels for mobile
devices. Those guidelines are consistent with safety
standards previously set by both U.S. and international
standards bodies: American National Standard Institute
(ANSI), National Council of Radiation Protection and
Measurements (NCRP), and International Commission
on Non-Ionizing Radiation Protection (ICNRP). Those