Abstract
Abstract The determination of levels of safe exposure of humans to radiofrequency fields is based principally on relating the threshold for harmful effects in exposed animals to the whole-body mass averaged absorbed energy density or specific absorption rate (SAR). The SAR, given in units of watts per kilogram, is a complex function of the source configuration, shape, and size of the exposed subjects, their orientation of the subject with respect to the source, and the frequency. To relate observed biological effects in exposed laboratory animals to safe exposure levels for humans, both the fields within the environment and the SAR within the exposed tissues must be determined. A combination of experimental and theoretical techniques, each valid for a particular model over a particular frequency range, has been used to determine whole-body average and peak SAR in humans and animals exposed to plane-wave radiation. Based on a review of the literature on animal research, the American National Standards Inst...
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