电话发明者贝尔英文介绍演示文稿

电话发明者贝尔英文介绍演示文稿目前一页\总数二十六页\编于二十一点*Born:March3,1847*Parents:AlexanderMelvilleBellandElisaGraceSymonds*Siblings:2brothers,MelvilleandEdwardAlexanderGrahamBell目前二页\总数二十六页\编于二十一点AlexanderGrahamBellgrewupinEdinburgh,Scotlandwithhisfamily.Childhood目前三页\总数二十六页\编于二十一点LearningFromtheFamilyAsachild,Bellinheritedamusicaltalentfromhismother,whowasamusicianandalsoaportraitpainter.Hewastaughtbyhisgrandfatherandfatheraboutpublicspeaking.目前四页\总数二十六页\编于二十一点HelloGrandpa!WhenBellwas13yearsold,hespentayearwithhisgrandfatherinLondon.ToGraham,thisyearwasthe“turningpointofhislife.”目前五页\总数二十六页\编于二十一点

BellreadbooksinthelibraryaboutHermanvonHelmholtz,aGermanscientistwhoexperimentedwithelectricalvibrationstomakevowelsounds.

HermanvonHelmholtz

Heresearchedhisexperimentssothatsomedayhemightbeabletoreconstructtheminhisownhome.

目前六页\总数二十六页\编于二十一点EarlyLife

AttheAgeof16,Grahambegantoteachmusicandspeechataboysschool.Yearslater,Bellstartedteachinghisfathersvisualspeechtodeafandhearingimpairedchildren.Bellatage29目前七页\总数二十六页\编于二十一点Tuberculosis-1870

In1870,Bell’stwobrothersdiedoftuberculosis.

SinceBellwasalsothreatenedhisfamilydecidedtomovetoahealthierenvironment,Canada.

目前八页\总数二十六页\编于二十一点

AfterGrahamwassafefromcatchingthedisease,hisjobledhimtobeaphysiologyprofessoratBostonUniversityintheUnitedStates.HelloBoston!Good-byeCanada!目前九页\总数二十六页\编于二十一点WhileBellwasinMassachusetts,heinventedtheharmonictelegraph,aninstrumentthatmakesitpossibletosendmultipletelegraphsononeline.BostonUniversity目前十页\总数二十六页\编于二十一点

OnMarch7,1876,Bellrecievedhispatentforthetelephone.TheTelephoneisPatented目前十一页\总数二十六页\编于二十一点“Mr.Watson,comehere,Iwantyou.”

OnMarch10,1876,AlexanderGrahamBellwasinhistestingroomwithhispartner,Watson.

目前十二页\总数二十六页\编于二十一点Theexperimenttheywereworkingwithhadreedsthatwerethinandsteel.

OneofthereedswasstucksoWatsonpluckedittotrytofixit.Reeds目前十三页\总数二十六页\编于二十一点Whenhedid,Grahamheardthevibrationclearlythroughthenewlyinvented‘telephone’.Successful!目前十四页\总数二十六页\编于二十一点

TheSimpleTelephone

Therearethreepartstothesimpletelephone.TheSpeaker,theMicrophoneandtheSwitch,alsoknownastheHookSwitch.

目前十五页\总数二十六页\编于二十一点TheHookSwitch

TheHookSwitchconnectsanddisconnectsthephonefromthetelephonenetwork.Thenetworkisconnectedwhenyoupickupthephone.目前十六页\总数二十六页\编于二十一点Thespeakerpicksupthesoundswavesfromtheotherline,andsendsthemthroughthenetworktoyoureardrums.Thesoundsvibrateinyourear,andyouthenhavesound.TheSpeaker目前十七页\总数二十六页\编于二十一点TheMicrophoneThemicrophonehasadiaphragmwherethesoundswavesvibratethearea.Theamplifier,asmallpartofthetelephonethensendsitthroughtotheotherline’sspeaker,reinterpretingthesoundsintophysicalvibrations.

目前十八页\总数二十六页\编于二十一点AMoreModernizedTelephoneTomakeuptherealtelephonetherearethe3majorparts,likethesimplephone,and3morenewparts,theseincludetheDuplexcoil,thekeypadandtheringer.目前十九页\总数二十六页\编于二十一点TheDuplexCoilInthesimplephone,youcanhearyourselfthroughthespeakerwhenyoutalk.TheDuplexcoilisadevicethatenablesyoutospeakintothemicrophonewithouthearingyourvoice.

目前二十页\总数二十六页\编于二十一点TheRingerTheRingerwasalsoanimprovementmadefromthesimpletelephone.Theringerismadeupofabellsothatyouareawarewhenanotherlineiscallingyou.目前二十一页\总数二十六页\编于二十一点KeypadThetouchtonekeypadconsistsoftwelvebuttons.Ithasthedigits1-9,andzero.Totheleftofthezeroisthestarkey.Locatedonit’srightisthepoundkey.

目前二十二页\总数二十六页\编于二十一点TheTelephoneThetelephonemayseemlikeacomplicatedmachine,butitreallyisoneofthesimplestdevicesthatyoumayfindinyourhome,oranywhereelseyoucanimagine.

目前二十三页\总数二十六页\编于二十一点TheTelephoneTodayToday,phoneshavebeenabletogetevensmallerandevenhavenocords.Inthebottomleft,thereisapalmpilotthatcanalsobeusedataphone.Thetelephoneisauniquepieceofequipment.Noonecanimagineourworldwithoutit.

目前二十四页\总数二十六页\编于二十一点ASaddayinHistoryOnAugust2,1922,AlexanderGrahamBelldiedathishomeinBaddekNovaScotia.

目前二十五页\总数二十六页\编于二十一点Bibliography---.“AlexanderGrahamBell.”LucidCafé.---.---.April27,2005</library196mar