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At 03:22 PM 5/27/00 -0400, Ludwik Kowalski wrote:
There was a TV program about the brain cancer
danger from cell phones last night. They said that
the measured dose rates (of electromatgetic radiation
absorbed in the head tissue) from common cell
phones exceeds the FCC recommended limit of
1.6 W/kg.
I am puzzled.
...as well you should be.
Let's see. My phone has a rated Tx power of 600 mW MAX at a frequency of
840 MHz or so. A typical human brain is about 1 liter, 1 kg. ...
Suppose half the Tx power gets absorbed by the brain. Then in round
numbers we have 0.3 W/kg, MAX, under conservative assumptions.
To put this in perspective, note that the normal metabolism of the human
brain is about 50 W.
It's hard to believe that 0.1% extra heat load is a health risk.
... Even the plaintiff'sbrian whatcott <inet@intellisys.net>
expert had to concede that the hat heated his brain far more than the phone
did.