Radiation From Cellphones
Underestimated,
Study Says
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Oct. 18, 2011
By Eryn Brown
LOS ANGELES Measuring radiation exposure using current
Federal Communications Commission guidelines underestimates
how much radiation most people receive from their cellphones,
researchers said Monday in a study published in the journal
Electromagnetic Biology and Medicine.
The authors of the study, including several members of the
Environmental Health Trust, a nonprofit organization devoted
to identifying and controlling environmental health risks,
pointed to several reasons why. One is that the current
assessment method bases evaluations of how much radiation
people are exposed to from their phones on measurements
taken using a quite large, liquid-filled plastic model of
the adult human head (known as the Specific Anthropomorphic
Mannequin, or SAM). Smaller people - 97 percent of the
population, the authors wrote - will have higher
proportional exposure than what is assessed.
Children receive twice as much microwave radiation to the
head from phones as adults, the study estimated, and 10
times the amount to bone marrow.
Also, current assessments don't examine exposure to parts of
the body other than the head, the study noted. Even when a
phone is stowed away in a pocket, it continues emitting
radiation that could pose a health concern.
The paper's authors called on the cellphone industry to stop
using the SAM-based system to certify phones for use. A
better method, the authors said, would be to begin using the
computer-based, "virtual family" simulation approach, which
assesses the radiation absorption for 10 different-sized
people: a 5-year-old girl, a 6-year-old boy, an 8-year old
girl, an 11-year-old girl, a 14-year-old boy, a 26-year-old
woman, a 35-year-old man, an obese man and three women at
different stages of pregnancy.
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