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Safety Guidelines
8. What has the FDA done to measure the radio
frequency energy coming from wireless
phones?
The Institute of Electrical and Electronic Engineers
(IEEE) is developing a technical standard for
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
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 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.