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Usage guidelines: All about performance and safety
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The exposure limit takes into consideration the body’s ability
to remove heat from the tissue 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.
What has 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 hand sets 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.