noise-pollution-噪音污染

NoisePollution1.Whatisnoise?----itisdefinedas‘unwanted’sound.2.Whatisnoisepollution?dBA85dBAmaycausePermanenthearingloss.Twomajorproperties:thefrequencyorpitch(Hz)theintensityorloudness(dBA)Can’tstandwith：150dB~130dBFeelpain：130dB~110dBAlittlenoisy：110dB~70dBQuiet：70dB~50dBVeryquiet：50dB~30dBExtremelyquiet：30dB~10dBNosound：0dB3.thenoisesourceTransportationnoise;Industrialproductionnoise;Sociallifenoise;Constructionnoise.Transportationnoise:(1)Roadtraffic(2)AirtrafficIndustrialproductionnoise:powerequipment(动力设备焊接、铆、冲床、钻机）;machine(机器柴油机等）;pneumaticnoise(气动噪声风机、电机、泵等）Constructionnoise:sitepreparation,repairsanddemolitionSociallifenoise:marketsisamajorsourceofthenoise;entertainment,sportsvenues,televisionsets,washingmachines,andothernoise.EffectsInthenarrowestsense,soundsareconsiderednoisepollutioniftheyadverselyaffectwildlife,humanactivity,orarecapableofdamagingphysicalstructuresonaregular,repeatingbasis.Noisepollutiondoseharmstopeopleandanimals,instrumentsandbuildings,theextentofthehazardsdependsmainlyonfrequency,intensityandexposuretime.Itharmssomuch.(1)thedamagetohearingThemostimmediateharmofnoisetohumanbodyishearingloss.Peoplewhoareinthestrongnoiseenvironment,exposedaperiodoftime,willfeeltheearsuncomfortable,evenfeelheadache,etc.Researchhasshownthatnoisepollutionisoneimportantcauseofdeaf.Inaddition,thehearingdamagehassomethingwiththelivingenvironmentandalsotheprofessionsyouareengaged.Suchastherateofhearinglossinruralislessthantheirpeerswhoaretextileworkers,Smith.(2)Thenoisecantriggervarietyofdisease(4)TheinterferencetothenormallifeandworkNoisecanleadtoeasytobewakenupwithastart,thedeclineofsleepquality.Asuddennoisehasamoreprominenteffectofsleep.Noisecaninterferewiththeconversation,workandstudy.Experimentsshowthat,whenpeopleweresuddenlyexposedtothenoise,theywilllosefoursecondsofattention.Accordingtostatistics,noisecanmakea10~50%reduceoflaborproductivity.Undernoisycurriculum,moremistakeswouldbemade.Thenoisewillalsomasksafesignals,suchasthealarmsignalandvehicletrafficsignalandsoon,ifso,itwouldcauseaccidents.ExamplePublicsquaredancingmostofthemmiddle-agedandretiredwomentendedtotaketheirdancingtoparks,publicsquares,parkinglotsandotherareasDancingitselfisnothingtocriticize,Butassoonas'groupdancing'becomes'publicnuisancedancing'thatinfringesontherightofotherstorelax,it'sanothermatter.'InWenzhouwarningmessagethrougha$41,900speakersystem.InBeijinggunshotsandTibetansInWuhanfecesGovernment’smeasuresTheLawofthePeople'sRepublicofChinaonPreventionandControlofEnvironmentalNoisePollutionthe22ndMeetingoftheStandingCommitteeoftheEighthNationalPeople'sCongressofthePeople'sRepublicofChinaonOctober29,1996March1,1997.noisesourcerouteoftransmissionreceivernoisesourcerouteoftransmissionreceiverLevelsDaytimeNighttime0504015545260503655547055Thegovernmentwillawardthegroupsandindividualswhohaveremarkableachievementsintheaspectofpreventionandcontrolofenvironmentalnoisepollution.MeasuresofIndividualsHowtoprotectourselvesNolongtimeatnoisyplaceHowtoprotectourselvesEarplugs（耳塞）,earmuffs（耳罩）orhelmetandearprotectorsHowtoprotectourselvessoundinsulation(绝缘)glassesReducepaintoothershighestDBat75to90Homeelectricalappliances,instruments,homeentertainment,indoordecoration.neighborOutRidingDrivingYourcarElectricorhybrid-electricNoalarmStrengtheningthemaintenancePublicplaceNospeakloudlyloudspeakersphone-vibratingThankyou