Introduction. The issues of radiofrequency electromagnetic field in near field human body exposure correct assessment and control methods improvement actualization determined the need to develop a predictive model that provides different exposure conditions in terms of their biological equivalence comparison.Materials and methods. The problem of laboratory rats and humans equivalent EMF exposure assessment in near and far fields was considered. It is proposed to use a set of criteria that include both the power absorption in the irradiated objects values and the exposure time, allowing to take into account the peculiarities of human body and animals species sensitivity to this factor to solve this problem.Results. Relations for RF EMF equivalent levels values calculation for concrete biological object in near and far fields are presented. There are presented the ratio to calculate EMF levels in terms of power density and energy exposure to case of human body exposure that is equivalent to experimental conditions of rats exposure.Discussion. The developed model can be used to compare the experimental conditions of exposure in the near field with PD values for far field (formed electromagnetic wave), which is most important for >300 MHz frequencies, as well as for the interpretation of EMF biological effects obtained in animal experiments to human exposure conditions assess. This provides a biologically based approach to control RF EMF intensity at any distance from the source and the comparison of the field strength levels with the PD values in the zone of the formed electromagnetic wave.Conclusion. The proposed model takes into account the physical patterns of energy absorption in different objects and differences of organisms species sensitivity to factor exposure; provides the ability to predict critical levels of irradiation for different human body organs and systems, taking into account the time of the factor exposure too.
New and necessary improvements of electromagnetic exposure assessment principles and methods are considered and presented. The electromagnetic field exposure assessment is the physical basis for hygienic and biological research and needs s to consider the new technological features of emerging 5G mobile systems in addition to existing 2-4G systems. The new generation of telecommunication networks will cause significantly novel electromagnetic field exposure, in particular for time-frequency and spatial parameters. A complex exposure assessment based on refined broadband measurements seems to be the proper and necessary approach to the enhancement of Russian EMF assessment guidelines. Simple broadband EMF measurements are the common approach for present exposure assessment and cannot be used any longer as the only measure for multiple 5G sources exposure evaluation. Then again broadband measurements are the simple and practical approach for mm wave in-situ exposure assessment. Frequency-selective and code-selective measurements provide detailed EMF level distribution in separate frequency channels, telecommunication services or sources and are a promising approach for objective exposure assessment.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.