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For Your Safety 145
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 device and is set well below levels known to have effects. Manufacturers
of wireless devices must report the RF exposure level for each model of device to
the FCC. The FCC website (
http://www.fcc.gov/oet/rfsafety
) gives directions for
locating the FCC identification number on your device so you can find your device’s
RF exposure level in the online listing.
8. What has the FDA done to measure the Radio Frequency
energy coming from wireless devices?
The Institute of Electrical and Electronic Engineers (IEEE) is developing a technical
standard for measuring the Radio Frequency (RF) energy exposure from wireless
devices 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 device 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 device.
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 device
complies with safety guidelines.
9. What steps can I take to reduce my exposure to Radio
Frequency energy from my wireless device?
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 Radio
Frequency (RF) energy. Since time is a key factor in how much exposure a person
receives, reducing the amount of time spent using a wireless device will reduce RF
exposure. If you must conduct extended conversations by wireless device 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
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