Analysis of the electroencephalograms under the effect of mobile phone radiation and protection screens using the dyna­mic chaos
It is proposed to study the clinical electroencephalograms, subjected to the effect of mobile phone radiation and influ­enced by protection screens based on radiation absorbing materials, with the use of the nonlinear dynamics methods. The clinical electroencephalograms recorded for healthy volunteers were processed and analyzed using the specially developed information-measuring system. The performed analysis of electroencephalograms shows that the structural changes in signals are different for GSM-sy-stem mobile phones operated in the regimes "phone - no reply"; "phone - reply", and also with the use of protection screens between the mobile phone and human ear. The employment of nonlinear methods considering bioelectric signals of the brain as a deterministic chaos enables one to realize the construction of phase portraits and to introduce such informative parameters as the correlation dimension d and Kol-mogorov entropy Е, making it possible to determine the influence of screens protecting against the electromagnetic radiation.