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A d d i t i o n a l s a f e t y i n f o r m a t i o n
energy (RF) exposures. FCC established these guidelines in consultation with
FDA and the other federal health and safety agencies. The FCC limit for RF
exposure from wireless telephones is set at a Specific Absorption Rate (SAR)
of 1.6 watts per kilogram (1.6 W/kg). The FCC limit is consistent with the
safety standards developed by the Institute of Electrical and Electronic
Engineering (IEEE) and the National Council on Radiation Protection and
Measurement. The exposure limit takes into consideration the body's ability
to remove heat from the tissues that absorb energy from the wireless phone
and is set well below levels known to have effects.
Manufacturers of wireless phones must report the RF exposure level for each
model of phone to the FCC. The FCC website (http://www.fcc.gov/oet/
rfsafety) gives directions for locating the FCC identification number on your
phone so you can find your phone's RF exposure level in the online listing.
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.
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