1 Introduction
As a result of the enormous increase in mobile phone usage
throughout the world, the effect of mobile phone radiation on
human health has become the subject of recent interest and study.
In recent years, there is an increasing public concern about the
health implications of the use of mobile phones. This concern is
heightened when the power absorption in the brain and the sensation
of warmth for the ear and skin in close proximity to the
telephone induce temperature increase inside it.
For this reason, various public organizations in the world have
established safety guidelines for electromagnetic wave absorption
[1,2]. For electromagnetic wave exposures, these guidelines are
based on peak specific absorption rate (SAR). The power absorption
of electromagnetic energy in human tissues induces temperature
increases inside tissue. Although the safety standards are
regulated in terms of the peak SAR value of tissue, the maximum
temperature increase in the human head caused by electromagnetic
energy absorption is an actual influence of the dominant
factors that induce adverse physiological effects. The severity of
the physiological effect produced by small temperature increases
can be expected to worsen in sensitive organs. Actually, a small
temperature increase in the brain of 3.5 C is noted to be an
allowable limit which does not lead to physiological damage [3].