40 NEXUS 4 QUICK START GUIDE
NEXUS 4 QUICK START GUIDE 41
industry, and academic organizations. CTIA funded research is
conducted through contracts with independent investigators. The
initial research will include both laboratory studies and studies
of wireless phone users. The CRADA will also include a broad
assessment of additional research needs in the context of the
latest research developments around the world.
7. How can I nd out how much radiofrequency energy exposure I
can get by using my wireless phone?
All phones sold in the United States must comply with Federal
Communications Commission (FCC) guidelines that limit
radiofrequency energy (RF) exposures. The FCC established these
guidelines in consultation with the FDA and the other federal health
and safety agencies. The FCC limit for RF exposure from wireless
telephones is set at a Specic 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 identication number on your phone
so you can nd your phone’s RF exposure level in the online listing.
8. What has the 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 Specic Absorption Rate (SAR)
in the Human Body Due to Wireless Communications Devices:
Experimental Techniques,’ sets forth the rst 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
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