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Human RF Radiation Risks

January 25th Fact-of-the-Day

Radiant RF energy is non-ionizing and is believed to not have cumulatively damaging effects like ionizing radiations such as x-rays have, if radiation doses are small enough to not cause biological cell damage due to heating. The amount of human heating from radiant RF energy is highly dependent upon both field-strength and frequency. A human body absorbs only very small percentages of radiant RF energy below 30 MHz. However, the absorption percentage rises at higher frequencies. About half the energy in a 400 MHz electromagnetic wave passing through a human is absorbed. Between 1 and 3 GHz the RF energy absorption of human flesh is nearly 100 percent (microwave ovens operate at 2.4 GHz, because the same is true for many foods). Human RF radiation absorption decreases above 3 GHz and is down to about 50 percent at 10 GHz, because about half the energy is reflected. ©2005 Martek International All rights reserved.


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