用英文介绍爱迪生的一项发明(详细)-查字典问答网
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  用英文介绍爱迪生的一项发明(详细)

  用英文介绍爱迪生的一项发明(详细)

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2020-06-16 01:28
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  Phonograph-History

  ThefirstgreatinventiondevelopedbyEdisoninMenloParkwasthetinfoilphonograph.Whileworkingtoimprovetheefficiencyofatelegraphtransmitter,henotedthatthetapeofthemachinegaveoffanoiseresemblingspokenwordswhenplayedatahighspeed.Thiscausedhimtowonderifhecouldrecordatelephonemessage.Hebeganexperimentingwiththediaphragmofatelephonereceiverbyattachinganeedletoit.Hereasonedthattheneedlecouldprickpapertapetorecordamessage.Hisexperimentsledhimtotryastylusonatinfoilcylinder,which,tohisgreatsurprise,playedbacktheshortmessageherecorded,"Maryhadalittlelamb."

  ThewordphonographwasthetradenameforEdison'sdevice,whichplayedcylindersratherthandiscs.Themachinehadtwoneedles:oneforrecordingandoneforplayback.Whenyouspokeintothemouthpiece,thesoundvibrationsofyourvoicewouldbeindentedontothecylinderbytherecordingneedle.ThiscylinderphonographwasthefirstmachinethatcouldrecordandreproducesoundcreatedasensationandbroughtEdisoninternationalfame.

  August12,1877,isthedatepopularlygivenforEdison'scompletionofthemodelforthefirstphonograph.Itismorelikely,however,thatworkonthemodelwasnotfinisheduntilNovemberorDecemberofthatyear,sincehedidnotfileforthepatentuntilDecember24,1877.Hetouredthecountrywiththetinfoilphonograph,andwasinvitedtotheWhiteHousetodemonstrateittoPresidentRutherfordB.HayesinApril1878.

  In1878,ThomasEdisonestablishedtheEdisonSpeakingPhonographCompanytosellthenewmachine.Hesuggestedotherusesforthephonograph,suchas:letterwritinganddictation,phonographicbooksforblindpeople,afamilyrecord(recordingfamilymembersintheirownvoices),musicboxesandtoys,clocksthatannouncethetime,andaconnectionwiththetelephonesocommunicationscouldberecorded.

  留声机:)

  请给我吧:)

  这里有很多呢:)

2020-06-16 01:31:44

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