Motorola i335 - Manual (Page 88)

84 Safety Information
Hearing Aid Compatibility
A number of Motorola phones have been tested for
hearing aid compatibility. When some wireless
phones are used with certain hearing aids, users
may detect a noise which can interfere with the
effectiveness of the hearing aid.
Some hearing aids are more “immune” than others
to this interference noise, and phones can also
vary in the amount of interference noise they may
generate. ANSI standard C63.19 was developed to
provide a standardized means of measuring both
mobile phone and hearing aids to determine
usability rating categories for both.
Ratings have been developed for mobile phones to
assist hearing aid users find phones that may be
compatible with their hearing aid. Not all phones
have been rated for compatibility with hearing
aids. Phones that have been rated have a label
with the rating(s) located on the box, and at
www.motorola.com/accessibility.
These ratings are not guarantees of compatibility.
Results will vary depending on the user's hearing
aid and individual type and degree of hearing loss.
If a hearing aid is particularly vulnerable to
interference, even a phone with a higher rating
may still cause unacceptable noise levels in the
hearing aid Trying out the phone with your hearing
aid is the best way to evaluate it for your personal
needs.
“M” Rating: Phones rated M3 or M4 meet FCC
requirements for hearing aid compatibility and are
likely to generate less interference to hearing aids
than unrated phones. (M4 is the “better” or higher
of the two ratings.) On those models with an
extendable antenna, this rating is determined only
with the antenna extended.
“T” Rating: Phones rated T3 or T4 meet FCC
requirements and are likely to be more usable with
a hearing aid's telecoil (“T Switch” or “Telephone
Switch”) than unrated phones. (T4 is the “better”
or higher of the two ratings.) On those models with
a telecoil mode setting, this rating is determined
only with the phone so set. For setting instructions,
see “Features for the Hearing Impaired” in the
section entitled “Advanced Calling Features”.
Note that not all hearing aids have telecoils in
them.
Hearing aids may also be measured for immunity
to interference from wireless phones and may
have ratings similar to wireless phones. Ask your
hearing healthcare professional for the rating of
your hearing aid. Add the rating of your hearing
aid and your phone to determine the estimated
usability:
• Any combined rating equal to or greater
than six offers excellent use.
• Any combined rating equal to five is
considered normal use.