This article analysеs the Specific Absorption Rate (SAR) and outlines the thermal effect in depth of the human head. SAR is the most important dosimetric value when the human body is irradiated with signals in the radio frequency range. For this purpose, a computer model is created using COMSOL Multiphysics software, taking into account the specific characteristics of the human head and the parameters of a working smartphone. This model is suitable for studying the effects of radio waves on humans
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