International Science Community Association Research Journal of Recent Sciences 2277 - 2502 4 1 2015 January 2 A Study of SAR in Human Head Due to Radiofrequency Radiation from Personal Data Assistant Device with Hands-Free Kits 51 54 EN Mehdi Yousefi 1 Department of Biology, Payam Noor University, Tehran, IRAN Sanaz Toranj 2 SeyedEmad Hosseini 1 ³ Deputy Director of Research, Institute for International Energy Studies (IIES), IRAN Abbasi² Farshad 2 Department of Engineering, Islamic Azad University, Marivan Branch, IRAN AhmadFarmahini Farahani 3 Director of Research, Institute for International Energy Studies (IIES), TEHRAN, IRAN Alidade Bahareh 1 Department of Industrial Engineering, Zahedan Branch, Islamic Azad University, Zahedan, IRAN Mohammad Ghasemi 2 Assistant professor, Department of Agricultural Economics, University of Zabol, Zabol, IRAN Rafiezadeh Mojtaba 1 Department of Management, Rasht Branch, Islamic Azad University, Rasht, Iran Badri Abassi 2 Mehrdad Godarzv 3 Chegini 4 Alinezhad Amin 1 Department of Studies in Linguistics, University of Mysore, INDIA Alipour Mohammad 1 Department of English, Khorasgan Branch, Islamic Azad University (IAU), Isfahan, IRAN Reza HaghverdiHamid 2 Biria Reza 3 ForoughiAbari1 Afsaneh 1 Department of English, Khorasgan Branch, Islamic Azad University, Isfahan, IRAN AhmadReza Lotfi 2 MuhammadIrfan Khattak 1 University of Engineering and Technology Peshawar, PAKISTAN J. Ma 2 School of Electronic, Electrical and Systems Engineering, Loughborough University, UK Shafi Muhammad 3 Faculty of Computer Science and Engineering, GIKI Topi, PAKISTAN Mohammad Saleem 4 > Research Paper 2013 12 28 2015 January 2 This paper deals with the absorption of RFenergy in human head caused by hands-free accessories compared to the handset alone. It was reported by others that hands-free kit may bring different influences to the SAR value in human head. The results of this study show the measurements results taken by the DASY4 system. The operating frequency is 1.8 GHZ and a particular designed SIM card is used. Two different mobile phones includingiphone 3GS are used in the measurements. Results presented here are useful in defining the radiation rate caused by adding hands-free close to human body. Research also indicates that using PDAs in front of human head can decrease the SAR value in human head. Copyright@ International Science Community Association