Sunday, 21 April 2019

Kids aren’t more exposed to radiofrequency energy from mobile phones than adults says international experts

  The graphic from Gandhi's 1996 paper does not support the claim that children absorb more radiation than adults, according to Drs Foster and Chou.


A comprehensive expert review of the scientific evidence has disputed claims, widely published on the internet, that children absorb more radiation from mobile phones than adults.

“In summary, simple generalizations found on the Internet about ‘kids absorbing more RF [Radio Frequency] energy than adults from cell phones’ aren’t supported by available dosimetry studies,” the experts concluded.
“To the extent that children have different usage patterns than adults, there may well be differences in exposure, but such differences are likely to be at exposure levels far below current exposure limits.”
 Two Institute of Electrical and Electronic Engineers (IEEE) Life Fellows, Drs Kenneth Foster and Chung-Kwang Chou, conducted the review to clear up decades of ongoing controversy over the issue.
 “Many websites and other media that address the general public state that children absorb more RF energy from mobile phones than adults, typically in support of arguments that mobile phones pose particular health risks to children,” Drs Foster and Chou said in the review recently published online in IEEE Access.
 “By contrast there have been few if any recent critical examinations of the claim that take into account the considerable technical complexity of the issue.”
 For example, the widely used graphic from Gandhi’s 1996 paper which compares the absorption patterns in the models of adult and children’s’ heads doesn’t support the claim.
 “The plain language meaning of ‘children absorb more microwave radiation than adults’ is that the total absorbed power in the bodies of children from use of a mobile phone will be higher than in the body of an adult. Gandhi’s own work does not support such a claim.” Drs Foster and Chou said.
 “Gandhi’s 1996 study shows that the fraction of the total output power of the antenna that is absorbed by the head and neck in the two child models was actually a bit lower than in the adult head model.”
 “The SAR averaged over the volume of the brain was considerably higher in the child head models. However this average scaled almost exactly as the brain volume, indicating that the total power absorbed in the brain was about the same in all three head models.”
 A previous analysis had concluded that the 1996 Gandhi paper had used unrealistically small models for the children’s heads. The head circumference of children aged 5 and 10 years old are 91% and 95%, respectively, of the size of adult heads. The analysis concluded that the scaled head models were closer in size “…to those of a newborn than to those of a 5 or 10 year old child.”
 Other studies have concluded that the compliance testing method for mobile devices is conservative for both adults and children.


Published 7/4/2015

Bookmark and Share