Health Effects of Mobile Phones ? Rolf Nilsen Sept 10 2008 Contents • Why this subject is important • Who does it concern • Symbols and definitions • Reference levels for general public • Result from field measurements • References • Conclusion Why this subject is important • High exposure levels from transmitters can harm people • Antennas for base stations ”come closer and closer ” every day • We have to be sure that the electromagnetic field from mobile phones and base stations is safe Who does it concern Health authority Public R&D PT Operators & planners Symbols and definitions −2 Wm watt per.sqere.meters power.density • −1 Vm volt per.metre E − field −1 Am ampere.metre H − field P ⋅G power density 4π ⋅ r −1 SAR Specific.absorption.rate W ⋅ kg Reference levels for general public Freq range E-field H-field 10- 400 MHz 28 400-2000 ” 2-300 GHz 0.073 Power density 1.37 61 SAR f= freq In MHz 2W kg 0.16 10 f f 200 Results from measurements • Measurements in Bergen 2000 • Measurements in Oslo 2001 • Measurements in large office buildings 2004 References • COST259 Health effects of Mobile Phones • WHO • Statens Strålevern • ICNIRP 7/1999 • Telenor Guideline on RF field Conclusion • What we know to day! • There is no evidence on brain cancer or other diseases caused by mobile phone • But, there are people who react negatively to electromagnetic field even if the power density is very low ... Measurements in Oslo 2001 • Measurements in large office buildings 2004 References • COST259 Health effects of Mobile Phones • WHO • Statens Strålevern • ICNIRP 7/1999 • Telenor Guideline on RF field Conclusion... every day • We have to be sure that the electromagnetic field from mobile phones and base stations is safe Who does it concern Health authority Public R&D PT Operators & planners Symbols and definitions... Conclusion • What we know to day! • There is no evidence on brain cancer or other diseases caused by mobile phone • But, there are people who react negatively to electromagnetic field even if the power