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Additional safety information
8. What has 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 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.