3
media-centre/pr/2010/pdfs/pr200_E.pdf.
WHO’s publication of Interphone is available at
http://ije.oxfordjournals.org/content/39/3/675.
abstract; see also, Interphone Appendix
(http://ije.oxfordjournals.org/content/
suppl/2010/05/06/dyq079.DC1/Interphone_
Appendix2.pdf).
What Does Specific Absorption Rate (SAR) Mean?
In 1996, the FCC, working with the FDA, the U.S.
Environmental Protection Agency (EPA) and other
agencies, established RF exposure safety guidelines for
wireless devices in the United States. Before a wireless
device model is available for sale to the public, it must be
tested by the manufacturer and certified to the FCC that
it does not exceed limits established by the FCC.
One of these limits is expressed as a Specific Absorption
Rate, or “SAR.” SAR is a measure of the rate of
absorption of RF energy in the body. Tests for SAR are
conducted with the wireless device transmitting at its
highest power level in all tested frequency bands. Since
1996, the FCC has required that the SAR of handheld
wireless devices not exceed 1.6 watts per kilogram,
averaged over one gram of tissue. Although the SAR is
determined at the highest power level, the actual SAR
value of a wireless device while operating can be less
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