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95
For Your Safety
is1.6watts/kg(W/kg)averagedoveronegramoftissue.Thestandardincorporatesa
substantialmarginofsafetytogiveadditionalprotectionforthepublicandtoaccount
foranyvariationsinmeasurements.
Caution: Avoid potential hearing loss.
Prolongedexposuretoloudsounds(includingmusic)isthemostcommoncauseof
preventablehearingloss.Somescientificresearchsuggeststhatusingportableaudio
devices,suchasportablemusicplayersandcellulartelephones,athighvolumesettings
forlongdurationsmayleadtopermanentnoise-inducedhearingloss.Thisincludes
theuseofheadphones(includingheadsets,earbudsandBluetooth
®
orotherwireless
devices).Exposuretoveryloudsoundhasalsobeenassociatedinsomestudieswith
tinnitus(aringingintheear),hypersensitivitytosoundanddistortedhearing.Individual
susceptibilitytonoise-inducedhearinglossandotherpotentialhearingproblemsvaries.
Theamountofsoundproducedbyaportableaudiodevicevariesdependingonthe
natureofthesound,thedevice,thedevicesettingsandtheheadphones.Youshould
followsomecommonsenserecommendationswhenusinganyportableaudiodevice:
• Setthevolumeinaquietenvironmentandselectthelowestvolumeatwhichyou
canhearadequately.
• Whenusingheadphones,turnthevolumedownifyoucannothearthepeople
speakingnearyouorifthepersonsittingnexttoyoucanhearwhatyouare
listeningto.
• Donotturnthevolumeuptoblockoutnoisysurroundings.Ifyouchoosetolisten
toyourportabledeviceinanoisyenvironment,usenoise-cancellingheadphonesto
blockoutbackgroundenvironmentalnoise.
• Limittheamountoftimeyoulisten.Asthevolumeincreases,lesstimeisrequired
beforeyourhearingcouldbeaffected.
• Avoidusingheadphonesafterexposuretoextremelyloudnoises,suchasrock
concerts,thatmightcausetemporaryhearingloss.Temporaryhearinglossmight
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