电话发明者贝尔英文介绍PPT课件

AlexanderGrahamBell,InventoroftheTelephone,ByMaryLouiseShore,2005,*Born:March3,1847*Parents:AlexanderMelvilleBellandElisaGraceSymonds*Siblings:2brothers,MelvilleandEdward,AlexanderGrahamBell,AlexanderGrahamBellgrewupinEdinburgh,Scotlandwithhisfamily.,Childhood,LearningFromtheFamily,Asachild,Bellinheritedamusicaltalentfromhismother,whowasamusicianandalsoaportraitpainter.,Hewastaughtbyhisgrandfatherandfatheraboutpublicspeaking.,HelloGrandpa!,WhenBellwas13yearsold,hespentayearwithhisgrandfatherinLondon.ToGraham,thisyearwasthe“turningpointofhislife.”,BellreadbooksinthelibraryaboutHermanvonHelmholtz,aGermanscientistwhoexperimentedwithelectricalvibrationstomakevowelsounds.,HermanvonHelmholtz,Heresearchedhisexperimentssothatsomedayhemightbeabletoreconstructtheminhisownhome.,EarlyLife,AttheAgeof16,Grahambegantoteachmusicandspeechataboysschool.Yearslater,Bellstartedteachinghisfathersvisualspeechtodeafandhearingimpairedchildren.,Bellatage29,Tuberculosis-1870,In1870,Bellstwobrothersdiedoftuberculosis.,SinceBellwasalsothreatenedhisfamilydecidedtomovetoahealthierenvironment,Canada.,AfterGrahamwassafefromcatchingthedisease,hisjobledhimtobeaphysiologyprofessoratBostonUniversityintheUnitedStates.,HelloBoston!Good-byeCanada!,WhileBellwasinMassachusetts,heinventedtheharmonictelegraph,aninstrumentthatmakesitpossibletosendmultipletelegraphsononeline.,BostonUniversity,OnMarch7,1876,Bellrecievedhispatentforthetelephone.,TheTelephoneisPatented,“Mr.Watson,comehere,Iwantyou.”,OnMarch10,1876,AlexanderGrahamBellwasinhistestingroomwithhispartner,Watson.,Theexperimenttheywereworkingwithhadreedsthatwerethinandsteel.OneofthereedswasstucksoWatsonpluckedittotrytofixit.,Reeds,Whenhedid,Grahamheardthevibrationclearlythroughthenewlyinventedtelephone.,Successful!,TheSimpleTelephone,Therearethreepartstothesimpletelephone.TheSpeaker,theMicrophoneandtheSwitch,alsoknownastheHookSwitch.,TheHookSwitch,TheHookSwitchconnectsanddisconnectsthephonefromthetelephonenetwork.Thenetworkisconnectedwhenyoupickupthephone.,Thespeakerpicksupthesoundswavesfromtheotherline,andsendsthemthroughthenetworktoyoureardrums.Thesoundsvibrateinyourear,andyouthenhavesound.,TheSpeaker,TheMicrophone,Themicrophonehasadiaphragmwherethesoundswavesvibratethearea.Theamplifier,asmallpartofthetelephonethensendsitthroughtotheotherlinesspeaker,reinterpretingthesoundsintophysicalvibrations.,AMoreModernizedTelephone,Tomakeuptherealtelephonetherearethe3majorparts,likethesimplephone,and3morenewparts,theseincludetheDuplexcoil,thekeypadandtheringer.,TheDuplexCoil,Inthesimplephone,youcanhearyourselfthroughthespeakerwhenyoutalk.TheDuplexcoilisadevicethatenablesyoutospeakintothemicrophonewithouthearingyourvoice.,TheRinger,TheRingerwasalsoanimprovementmadefromthesimpletelephone.Theringerismadeupofabellsothatyouareawarewhenanotherlineiscallingyou.,Keypad,Thetouchtonekeypadconsistsoftwelvebuttons.Ithasthedigits1-9,andzero.Totheleftofthezeroisthestarkey.Locatedonitsrightisthepoundkey.,TheTelephone,Thetelephonemayseemlikeacomplicatedmachine,butitreallyisoneofthesimplestdevicesthatyoumayfindinyourhome,oranywhereelseyoucanimagine.,TheTelephoneToday,Today,phoneshavebeenabletogetevensmallerandevenhavenocords.Inthebottomleft,thereisapalmpilotthatcanalsobeusedataphone.Thetelephoneisauniquepieceofequipment.Noonecanimagineourworldwithoutit.,ASaddayinHistory,OnAugust2,1922,AlexanderGrahamBelldiedathishomeinBaddekNovaScotia.,Bibliography,-.“AlexanderGrahamBell.”LucidCaf.-.-.April27,2005“Bell,AlexanderGraham.”TheNewBookofKnowledge.B,2000edition“Bell,AlexanderGraham.”AcademicAm