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heads of wireless phone users. The test method uses a
tissue-simulating model of the human head.
Standardized SAR test methodology is expected to
greatly improve the consistency of measurements
made at different laboratories on the same phone. 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 radio
frequency 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 radio frequency 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
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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 radio frequency 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.