Israeli Researchers Question Safety Of Cellphones

Headaches, nausea, dizziness, short-term memory problems, fatigue, and other complaints resulting from cellular phone use are not due to low-level heating of the brain; instead, they’re apparently caused by the head serving as an “antenna” and brain tissue as a radio receiver, according to two Jerusalem researchers.

Zvi Weinberger, a physicist who heads the applied physics department at the Jerusalem College of Technology, and Dr. Elihu Richter, head of the occupational medicine unit at the Hebrew University-Hadassah Braun School of Public Health, suggested this in the latest issue of the journal Medical Hypotheses.

Mobile phones, they explained, “broadcast specifically at frequencies at which the head serves as an antenna and brain tissue serves as a demodulating radio receiver.” Thus, precaution must be taken in the use of cellphones, they wrote.

They called for a “reexamination of the assumptions” underlying the US Federal Communications Commission statement that the typical radio frequency exposures to cellphones are safe. Instead, the researchers suggested that past studies on which the FCC based its statement “are not applicable” to the cellphone frequencies for which the head acts as a resonator.

Weinberger suggested that using a stethoscope-like extension device that transmits sound from the cellphone by air to the ear attached to the phone would be safer, as this device does not transmit electromagnetic radiation.

The researchers said the oval-shaped head has a short axis of 16 to 17 centimeters long. This dimension is equal to a half wavelength for frequencies in the 900 megahertz range. It is equal to a complete wavelength at 1800 Mhz. This shape is perfect for making the head serve as a resonator for electromagnetic radiation emitted by the cellphone, which causes it to absorb much of the energy specifically from these wavelengths.

Numerical analysis shows that at 900 Mhz, the adult-sized head absorbs 80 percent of the radiation emitted by a cellular phone, while the head of a seven-year-old child absorbs only 69% of the radiation due to its smaller size, Weinberger told The Jerusalem Post. But because children’s heads are growing, this lower amount of radiation absorption is much more dangerous, he said. Therefore, the British scientific recommendation that children use cellphones as infrequently as possible should be followed, Weinberger added.

http://www.jpost.com

Courtesy Jocelyn Braddell at togethernet