Section 10: Health and Safety Information 149
Using Your Phone Near Other Electronic Devices
Section 10
Pacemakers
Pacemaker manufacturers recommend that a minimum
distance of 15 cm (6 inches) be maintained between a
wireless phone and a pacemaker to avoid potential
interference with the pacemaker.
These recommendations are consistent with the
independent research and recommendations of Wireless
Technology Research.
Persons with pacemakers:
•
should always keep the phone more than 15 cm (6 inches) from
their pacemaker when the phone is switched on.
• should not carry the phone in a breast pocket.
• should use the ear opposite the pacemaker to minimize
potential interference.
If you have any reason to suspect that interference is
taking place, switch your phone off immediately.
Hearing Aid Compatibility with Mobile Phones
When some mobile phones are used near some hearing
devices (hearing aids and cochlear implants), users may
detect a buzzing, humming, or whining noise. Some
hearing devices are more immune than others to this
interference noise, and phones also vary in the amount of
interference they generate.
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 are rated have the rating on their box or a label on the
box.
a630.book Page 149 Tuesday, July 26, 2005 9:08 AM
Section 10
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.
Other Medical Devices
If you use any other personal medical devices, consult the
manufacturer of your device to determine if it is
adequately shielded from external RF energy. Your
physician may be able to assist you in obtaining this
information. Switch your phone off in health care facilities
when any regulations posted in these areas instruct you to
a630.book Page 150 Tuesday, July 26, 2005 9:08 AM
150