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76
Safety
Engineering in Medicine and Biology Society, Committee on
Man and Radiation (COMAR) of the Institute of Electrical and
Electronics Engineers
http://ewh.ieee.org/soc/embs/comar/
Consumer Information on SAR
(Specific Absorption Rate)
ThismodelphonemeetstheGovernment’srequirementsforexposure
toradiowaves.Yourwirelessphoneisaradiotransmitterandreceiver.
Itisdesignedandmanufacturednottoexceedtheemissionlimitsfor
exposuretoradiofrequency(RF)energysetbytheFederalCommunications
Commission(FCC)oftheU.S.Government.TheseFCCexposurelimits
arederivedfromtherecommendationsoftwoexpertorganizations,the
NationalCounselonRadiationProtectionandMeasurement(NCRP)andthe
InstituteofElectricalandElectronicsEngineers(IEEE).Inbothcases,the
recommendationsweredevelopedbyscienticandengineeringexperts
drawnfromindustry,government,andacademiaafterextensivereviewsof
thescienticliteraturerelatedtothebiologicaleffectsofRFenergy.
Theexposurelimitforwirelessmobilephonesemploysaunitofmeasurement
knownastheSpecicAbsorptionRate,orSAR.TheSARisameasureofthe
rateofabsorptionofRFenergybythehumanbodyexpressedinunitsofwatts
perkilogram(W/kg).TheFCCrequireswirelessphonestocomplywithasafety
limitof1. 6 wattsperkilogram(1.6W/kg).TheFCCexposurelimitincorporates
asubstantialmarginofsafetytogiveadditionalprotectiontothepublicandto
accountforanyvariationsinmeasurements.
TestsforSARareconductedusingstandardoperatingpositionsspecied
bytheFCCwiththephonetransmittingatitshighestcertiedpowerlevel
inalltestedfrequencybands.AlthoughSARisdeterminedatthehighest
certiedpowerlevel,theactualSARlevelofthephonewhileoperating
canbewellbelowthemaximumvalue.Becausethephoneisdesignedto
operateatmultiplepowerlevelstouseonlythepowerrequiredtoreachthe
network,ingeneral,thecloseryouaretoawirelessbasestationantenna,
thelowerthepoweroutput.
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