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Measurement of Cell Phone Users' EMF Energy Exposure with a Human Head Model

Last modified on: Thursday, November 06, 2008 12:12:30
Copyright © 1994-2009, Information Ventures, Inc.

The authors described a method for quantifying radiofrequency (RF) radiation exposures of users of portable cellular telephones in terms of Specific Absorption Rate (SAR) using a simple model of the human head. The authors concluded that their method can quantify "worst-case" RF exposures of cellular telephone users in terms of the SAR. Peak localized SARs predicted by the model are substantially below the basal metabolic rate of human brain tissue. The results obtained suggest that adverse effects from thermal damage are highly unlikely [BENER 12899]


READER COMMENTS
September 25, 2003 - Robert I have been disabled for four years now because of my over use of a digital cellphone. I know this for a fact. I ran my business from a cellphone for a little over a year as well as talk to my wife for hours on it while out on the road. I began to experience headaches after I used the phone, then I began to get the headaches while on the phone, then multiple other symptoms occured including severe memory problems, chronic fatigue, chronic insomnia, anxiety, panic attacks, and a host of other problems. All my symptoms have been documented to have occured in people who have been exposed to microwave energy. Why is it so hard for medicine to believe people can become ill from a cellphone, even at the so called low level output the phones are supposed to have. What the industry doesn't tell you is if the signal to the tower is weak the phone automatically boosts it's signal making it a more powerful transmitter.

August 26, 2002 - Frank I was talking to my sister last night and was alarmed when she told me her neurologist (who she sees since she slipped and cracked three ribs, plus sustained a minor brain injury) had taken an MRI and found lesions that he said resemble those of patients with multiple sclerosis. She has some minor symptoms, such as weakness in the right hand (which was also injured in the fall), that make her willing to believe she might have "slight" MS. (I told her there's no such thing as "slight" MS; it's like being "a little bit pregnant"!) I happen to know she's been a cell-phone user for at least twelve years, and I wonder if this is considered a factor in her case. I'm naturally very concerned for her, and am hoping the lesions she has are benign.

October 19, 1999 - Bill I have had burning pain and dizziness related to the use of my cell phone. I had a new incident last night that has caused me to begin research on the possible effects and to stop using my cell phone. After a lengthy call on the phone I experienced partial blindness and nausia for about 3 hours. I know the reports say it is unlikly but I wont be using that phone again.

October 12, 1999 - Stacey Sandy - (message from June 15, 1999)- I had similar symptoms before I ever used a cell phone and what I had was labrinthitis. It has something to do with the inner ear (eardrum, I think) and throws your equilibrium off. The doctor gave me some pills to take care of it and after a couple of pills those symptoms were gone. I hope it helps!

September 30, 1999 - Eleyna Olivas Please let me know of any information for research or study being done on cell phones and the diagnosis of Neurocytoma. I have a friend who was diagnosed with this type of tumor and looking for information on the relationship between brain tumors and cell phones.

June 15, 1999 - Sandy Weil I noticed over the last few months that my ears would ache while using my cell phone. It actually starting aching while using it. Over the last few weeks I was on the road a lot and unfortunately used my phone much more than usual. I was also under a great deal of stress. I have had dizzy spells for a period of appx. 8 days, and pain in my ears on and off, I also felt slightly off balance, like I was on a boat, but that seemed to get better also. I believe this is related to the cell phone. I have stopped using my cell phone. The dizzy spells are less frequent, but it worries me. Please forward as many places to gather info. as possible. Thank You.

April 03, 1999 - Dr. N. Davis, Pentagon - Hi / Lo RF Research Group
Comments: Research on the human head model w.r.t. field R.F. transmitters for military purposes yielded results that should direct civilian portable phone research:
1. Rat brains have similar cell structure to human brains, but mutation results of R.F. exposure on X-link and rejaisic families are non-significant as the rat skull/tissue is not scalable to match human skull aspect ratios/densities etc
2. The question of scalability yielded the most significant factors in determining cell damage due to R.F. exposure:
(a) Intensity and duration of incident R.F.
(b) Location of "hot spots" is determined by aspect ratio of skull/brain density. Propensity for standing waves in human skulls with non-ionising short wavelength radiation varies with microscopic variation in skull thickness, dimensions, how the operator holds the handset etc.
(c) Existing tumors and lesions can affect potential for "hot spots"

Conclusions
1. Accurate human head model could not be created for purposes of determing potential for cell damage due to incident localised R.F. exposure; there are too many variables.
2. Computer simulation suggests that 30% of human population has skull dimensions that fall within 5% confidence limits for standing wave damage (2-tail test).
3. Military applications operate on burst technology (exposure times under 5 seconds). There is no significant body of data on the long periods of continuous low-level exposure encountered in civilian 'phone usage, except the current population of portable 'phone users.


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