Bhargava D. , Leeprechanon N. Rattanadecho P. and Wessapan T., “Specific Absorption Rate and Temperature Elevation in the Human Head Due to Overexposure to Mobile Phone Radiation with Different Usage Patterns”, International Journal of Heat and Mass Transfer, Vol 130, pp. 1178-1188, 2019:
Impact Factor 4.94 (Q1)
Abstract
Accidental overexposure to non-standard mobile phone radiation can occur in many situations. The overpower
limit of mobile phone radiation interacts with the human body which could result in an adverse
effect on human health. It is envisaged that the severity of the physiological effect can take place with
small temperature increase in the delicate organs or tissues such as eyes, brain, skin, etc. However, the
resulting thermo-physiological response of the body tissues to overpower limit of mobile phone radiation
is still not well implemented. The aim of this study is to analyze the effect of overexposure of mobile
phone radiation on the specific absorption rate (SAR) and temperature increase in three-dimensional
heterogeneous human head models. The study focuses attention on the differences in the electromagnetic
(EM) absorption characteristics with higher power level among different usage pattern. The effect
of three different usage patterns – voice calling, video calling, and texting- on SAR and temperature distributions
in different types of head tissues is systematically investigated. This paper also investigates the
effects of different user ages, radiated powers, and gap distances between mobile phone and human
heads, on SAR and temperature distributions. Results obtained from this analysis considering the safety
guidelines show a high impact of mobile phone radiation in the voice calling position. Hence, comparisons
of the absorption of mobile phone radiation are calculated between an adult and a 7-year-old child
head model, for the voice calling position at different gap distances. In addition, the results indicate that
child head always has a higher absorption rate of mobile phone radiation than the adult head. The rate of
absorption in tissue increases as the distance between mobile phone and head decreases and the radiated
power increases, depending on their dielectric and thermal properties. The obtained results can be helpful
in determining exposure limits for the power output of the mobile phone, and the distance a user
should maintain from the mobile phone in thermo-physiological aspects.
