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Safety Guidelines
phones that may be compatible
with their hearing devices. Not
all phones have been rated.
Phones that are rated have the
rating on their box or a label on
the box. 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 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.