Comparisons of Computed Mobile Phone Induced SAR in the SAM Phantom to That in Anatomically Correct Models of the Human Head

Abstract

The specific absorption rates (SAR) determined computationally in the specific anthropomorphic mannequin (SAM) and anatomically correct models of the human head when exposed to a mobile phone model are compared as part of a study organized by IEEE Standards Coordinating Committee 34, SubCommittee 2, and Working Group 2, and carried out by an international task force comprising 14 government, academic, and industrial research institutions. The detailed study protocol defined the computational head and mobile phone models. The participants used different finite-difference time-domain software and independently positioned the mobile phone and head models in accordance with the protocol. The results show that when the pinna SAR is calculated separately from the head SAR, SAM produced a higher SAR in the head than the anatomically correct head models. Also the larger (adult) head produced a statistically significant higher peak SAR for both the 1- and 10-g averages than did the smaller (child) head for all conditions of frequency and position.

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New Algorithms for the Specific Absorption Rate Numerical Evaluation Based on Spherical Averaging Volumes

“…More specifically, apart from some regional lows and the previous IEEE standard [3], which refer to rm = 1 g, both [1,2] refer to rm = 1 g. Safety limits are accurately fixed distinguishing among different categories of workers and different body parts, and they are also frequently updated as a consequence of the results produced by the scientific community. For instance, a confirmation of that is given by the introduction for the first time in a guideline [1] of specific safety limits for the pinna which take into account the anatomic details of the ear and their effects in the exposure to cellular phones [4][5][6]; such diversification had not been considered neither in the previous IEEE standards [3,7] nor in ICNIRP guideline.…”