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Safety Guidelines
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Safety Guidelines
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 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.
To ensure that the Hearing Aid
Compatibility rating for your
phone is maintained, secondary
transmitters such as Bluetooth
®
and WLAN components must be
disabled during a call.