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measuring the radio frequency energy
(RF) exposure from wireless phones
and other wireless handsets with the
participation and leadership of FDA
scientists and engineers. The standard,
‘Recommended Practice for
Determining the Spatial- Peak Specific
Absorption Rate (SAR) in the Human
Body Due to Wireless Communications
Devices: Experimental Techniques,’sets
forth the first consistent test
methodology for measuring the rate at
which RF is deposited in the heads of
wireless phone users. The test method
uses a tissuesimulating 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 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
Safety Guidelines
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