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21
8. What has the FDA done to measure the radiofrequency energy
coming from wireless phones?
The Institute of Electrical and Electronic Engineers (IEEE) is developing
a technical standard for measuring the radiofrequency 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 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 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 does 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.
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