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Nokia 1100 User Guide 47 Copyright © Nokia 2003
SAR is the measurement of the amount of energy absorbed in tissue, either by the whole
body or a small part of the body. It is measured in watts/kg (or milliwatts/g) of matter. This
measurement is used to determine whether a wireless phone complies with safety guidelines.
9. What steps can I take to reduce my exposure to radiofrequency energy from
my wireless phone?
If there is a risk from these products--and at this point we do not know that there is--it is
probably very small. But if you are concerned about avoiding even potential risks, you can
take a few simple steps to minimize your exposure to radiofrequency energy (RF). Since time
is a key factor in how much exposure a person receives, reducing the amount of time spent
using a wireless phone will reduce RF exposure.
If you must conduct extended conversations by wireless phone every day, you could place
more distance between your body and the source of the RF, since the exposure level drops
off dramatically with distance. For example, you could use a headset and carry the wireless
phone away from your body or use a wireless phone connected to a remote antenna.
Again, the scientific data do not demonstrate that wireless phones are harmful. But if you
are concerned about the RF exposure from these products, you can use measures like those
described above to reduce your RF exposure from wireless phone use.
10. What about children using wireless phones?
The scientific evidence does not show a danger to users of wireless phones, including
children and teenagers. If you want to take steps to lower exposure to radiofrequency energy
(RF), the measures described above would apply to children and teenagers using wireless
phones. Reducing the time of wireless phone use and increasing the distance between the
user and the RF source will reduce RF exposure.Some groups sponsored by other national
governments have advised that children be discouraged from using wireless phones at all. For
example, the government in the United Kingdom distributed leaflets containing such a
recommendation in December 2000. They noted that no evidence exists that using a wireless
phone causes brain tumors or other ill effects. Their recommendation to limit wireless
phone use by children was strictly precautionary; it was not based on scientific evidence that
any health hazard exists.
11. What about wireless phone interference with medical equipment?
Radiofrequency energy (RF) from wireless phones can interact with some electronic devices.
For this reason, FDA helped develop a detailed test method to measure electromagnetic
interference (EMI) of implanted cardiac pacemakers and defibrillators from wireless
telephones. This test method is now part of a standard sponsored by the Association for the
Advancement of Medical instrumentation (AAMI). The final draft, a joint effort by FDA,
medical device manufacturers, and many other groups, was completed in late 2000. This
standard will allow manufacturers to ensure that cardiac pacemakers and defibrillators are
safe from wireless phone EMI. FDA has tested hearing aids for interference from handheld
wireless phones and helped develop a voluntary standard sponsored by the Institute of
Electrical and Electronic Engineers (IEEE). This standard specifies test methods and
performance requirements for hearing aids and wireless phones so that no interference
occurs when a person uses a compatible phone and a accompanied hearing aid at the same
time. This standard was approved by the IEEE in 2000.
FDA continues to monitor the use of wireless phones for possible interactions with other
medical devices. Should harmful interference be found to occur, FDA will conduct testing to
assess the interference and work to resolve the problem.