Originally posted by KazetNagorra
That is true, but the body also has plenty of internal heat sources (from cell activity) and it can cope with the heat produced from that.
I think there are studies showing damage to cells from longer term exposure to low levels of RF in the >1 to 10 Ghz frequency range, maybe from being localized. There used to be a device called a Diatherm machine, something like that spelling, that used induced RF heating on say, an arm or chest, with supposed medical benefits but I don't think it ever was shown to actually help anyone except make them feel warm inside.
I guess there are therapeutic benefits:
a little piece of an article about it, Diathermy:
the use of high-frequency electrical currents as a form of physical therapy and in surgical procedures.
Diathermy is used in physical therapy to deliver moderate heat directly to pathological lesions in the deeper tissues of the body. Surgically, the extreme heat that can be produced by diathermy may be used to destroy neoplasms, warts and infected tissues, and to cauterize blood vessels to prevent excessive bleeding. The technique is particularly valuable in neurosurgery and surgery of the eye. See also electrosurgery.
However, that is more of a short time frame controlled use of RF, not long term exposure.
Here is another piece of a link about RF damage to human cells:
Moderate level exposures cause heat stress and behavioral changes. The effects are often mistaken for the flu because the symptoms are similar. As the level of exposure increases, the potential for harm increases. Human cells die at 107° Fahrenheit. This is the reason why doctors get concerned if someone’s temperature goes above 105°. The body is constantly replacing cells, so the amount of damage that is done depends on how many cells are killed and the type of cells that are killed. Kill off some cells, and the effects may pass in minutes or hours. Destroy a lot of liver cells for instance, and you will have liver damage. If the damage is not too severe, the body can repair itself. However, if the damage is extensive, the effects may be permanent! Perhaps the most vulnerable organs are the eyes. The eyes have virtually no blood flow that can provide cooling from other parts of the body, and their dimensions make them very good antennas at microwave frequencies.
I didn't know human cells started dying with temps as low as 107 degrees F. I remember having a fever close to that as a child, 106 degrees which caused long lasting eye problems (myopia) So the question becomes, can extended cell phone use in the way we usually use them, next to the ear, produce that kind of temperature in the brain. If so, my own technique of using speakerphone is validated.
Also, as a ham who has a lot of RF equipment, and antennas close to the house, I try to limit my talk time on the air and seldom use walkie talkies (we call them handie talkies), because the power of those devices is like I said some 50 times higher than cell phones so the danger there is a lot higher in terms of brain cell damage.
I found a link to various studies of cell phone brain cell damage:
They seem to be saying 30 minutes of cell phone use could start the process off making brain tumors. There is an excellent drawing of the RF pattern near the head vs that rf reaching the cell phone tower.