Palm TREO 800W User Manual page 305

The wireless telephone industry has developed ratings for some of
their mobile phones, to assist hearing-device users in finding phones
that may be compatible with their hearing devices. Not all phones
have been rated. Phones that have been rated have a label on the
box. Your Palm Treo 800 phone has an M4 and T4 rating.
W
These ratings are not guarantees. Results will vary, depending on the
level of immunity of your hearing device and the degree of your
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 with 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 contain telecoils.)
The more immune your hearing aid device is, the less likely you are to
experience interference noise from your wireless phone. Hearing aid
devices should have ratings similar to those of phones. Ask your
hearing health-care professional for the rating of your hearing aid. Add
the rating of your hearing aid and your phone to determine probable
usability:
• Any combined rating equal to or greater than six offers best use.
• Any combined rating equal to five is considered normal use.
• Any combined rating equal to four is considered usable.
Thus, if you pair an M3 hearing aid with an M3 phone, you will have a
combined rating of six for "best use. " This is synonymous for T
ratings.
Palm further suggests that you experiment with multiple phones
(even those not labeled M3/T3 or M4/T4) while in the store to find the
one that works best with your hearing aid device. If you experience
interference or find the quality of service unsatisfactory after
purchasing your device, promptly return it to the store within 30 days
of purchase. With the Palm 30-day Risk-Free Guarantee, you may
return the device within 30 days of purchase for a full refund, and you
will only be responsible for charges based on your actual usage.
Getting the Best Hearing Device Experience With Your
Smartphone
To further minimize interference:
There is usually less interference on the microphone setting than on
the telecoil setting.
Set the phone's screen and keyboard backlight settings to ensure the
minimum time interval.
Move the phone around to find the point with the least interference.
If your hearing aid is equipped with a telecoil, turn on the HAC setting
on your smartphone.
Turning on the HAC Setting
When the HAC setting is on, your smartphone sends the audio from
your phone calls to the telecoil rather than to the microphone of your
hearing aid. You are likely to hear calls much better because volume is
increased and background noise and feedback are diminished. The
HAC setting improves only the calls you listen to through the
earpiece. Turn off BT. Turn off WiFi. It does not affect calls heard on
the speakerphone or with a car kit or headset. HAC requires extra
battery power, so watch your battery consumption when it's turned
on.
CAUTION Do not turn on the HAC setting unless you use a hearing
aid with a telecoil. Using this setting without a hearing aid or with a
hearing aid without a telecoil may be harmful to your hearing.
1 Make sure your phone is turned on (see "Turning Your Device's
Phone On and Off" on page 55).
2 Press Phone .
3 Press Menu .
4 Select Options and then select Phone Preferences.
5 Check the Hearing Aid Compatibility box.
6 Select OK.
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