User Manual

46
than others to this interference noise,
and mobile devices also vary in the
amount of interference they generate.
The wireless telephone industry has
developed a rating system for wireless
mobile devices to assist hearing device
users find mobile devices that may be
compatible with their hearing devices.
Not all mobile devices have been rated.
Mobile devices that are rated have the
rating on their box or a label located 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 mobile device successfully.
Trying out the mobile device with your
hearing device is the best way to
evaluate it for your personal needs.
M-Ratings
: Wireless mobile devices rated
M3 or M4 meet FCC requirements and
are likely to generate less interference to
hearing devices than mobile devices that
are not labeled. M4 is the better/higher
of the two ratings. M-ratings refer to
enabling acoustic coupling with hearing
aids that do not operate in telecoil mode.