MOBILE PHONE RADIATION AND HEALTH

Theeffect of mobile phone radiation on human healthis the subject of recent interest and study, as a result of the enormous increase inmobile phoneusage throughout the world (as of November 2011, there were more than 5.981 billion subscriptions worldwide). Mobile phones useelectromagnetic radiationin themicrowaverange. Other digital wireless systems, such as data communication networks, produce similar radiation.

EFFECTS

Radiation absorptionPart of the radio waves emitted by a mobile telephone handset are absorbed by thehuman head. The radio waves emittedby aGSMhandset can have a peakpowerof 2watts, and a US analogue phone had a maximum transmit power of 3.6watts. .[citation needed]Other digital mobile technologies, such asCDMA2000andD-AMPS, use lower output power, typically below 1 watt.[dubiousdiscuss]The maximum power output from a mobile phone is regulated by the mobile phone standard and by the regulatory agencies in each country.[citation needed]In most systems the cellphone and thebase stationcheck reception quality and signal strength and the power level is increased or decreased automatically, within a certain span, to accommodate different situations, such as inside or outside of buildings and vehicles.[dubiousdiscuss]The rate at which energy is absorbed by the human body is measured by theSpecific Absorption Rate(SAR), and its maximum levels for modern handsets have been set by governmental regulating agencies in many countries.