72 Chapter 5 Last, but Not Least
Hearing damagePermanenthearinglossmayoccurifearbudsorheadphonesare
usedathighvolume.Youcanadaptovertimetoahighervolumeofsoundthatmay
soundnormalbutcanbedamagingtoyourhearing.Ifyouexperienceringinginyour
earsormuedspeech,stoplisteningandhaveyourhearingchecked.Thelouderthe
volume,thelesstimeisrequiredbeforeyourhearingcouldbeaected.Hearingexperts
suggestthattoprotectyourhearing:

ÂLimittheamountoftimeyouuseearbudsorheadphonesathighvolume.

ÂAvoidturningupthevolumetoblockoutnoisysurroundings.

ÂTurnthevolumedownifyoucan’thearpeoplespeakingnearyou.

High-risk activitiesThiscomputerisnotintendedforuseintheoperationofnuclear
facilities,aircraftnavigationorcommunicationssystems,airtraccontrolsystems,
orforanyotheruseswherethefailureofthecomputercouldleadtodeath,personal
injury,orsevereenvironmentaldamage.
Laser Information for Optical Disc Drives
WARNING: Makingadjustmentsorperformingproceduresotherthanthosespecied
inyourequipment’smanualmayresultinhazardousradiationexposure.
Theopticaldiscdriveinyourcomputercontainsalaserthatissafeinnormalusebut
thatmaybeharmfultoyoureyesifdisassembled.Foryoursafety,havethisequipment
servicedonlybyanAppleAuthorizedServiceProvider.