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 Wysłany: Sob 22:38, 07 Maj 2011 Temat postu: oakley norge Distinguish between the sound of the |
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Distinguish between the sound of the air mass
struetur ~ borneNoiseinaG0hera1AviationAircFaft, NASACR a 159,[link widoczny dla zalogowanych],099 . Aug. , 1979:2] Lois, A ... RMcgary, M. C. : StudiesofTransmissioninAdvancedCornpositeMateria1Structures, ACEECompositeStructureConference, 1984 [3] Beranek, LLNoiseandVibrationContro1. McGraw-Hill, Inc. [4] Fahy,[link widoczny dla zalogowanych], F ... JSoundandStructuralibration, AcademicPresslnc. [53GadeSSoandIntensity (Theory) andSoundIntensity (InstrumentatlonandApp1icati0ns), accounting & KTechnicalReviews,[link widoczny dla zalogowanych], No. 3andNo. 4,1982 [8] Bockboff, M. : SomeRemarksontheContinuousSweepingMethodinSoundPowerDetermlnation,[link widoczny dla zalogowanych], ProceedingsofINTER-NoIsE, 1984StudyonSeparatingAirborneandStructureborneNoisesHuZhangweiYinJianping (NanjingAeronauticalInstitute) bstractItisimportanttoknowthepredomlnantsourc0COntributedtothecabinnoiseinredutingthenoisein. theaircraft, 5othatthereasonableandeffectienoisecontroltreatmentcanbeused. Thenoiseenteringthecabincftheaircraftismain1Ydividedintotwomajorcategoties, viz, airborneexcitingnoiseandmechanicexcitingnoise. Thefofreeriscalledairhornenoiseforthecoatrihutiontothecabinnseandthelatterstructnrebornenoise. Theformulaeforseparatingthemafederivedusingtwomicropboneaconsticintensitymethodinthetwotypesofexcitati0nintermsofthedifferenceintheairborneandstTucturebofnenoiseradlationefficienciesfortheaircraftfuselage. Theexperimentsseparatingtheairbornenoiseandstruetu-rebornenoiseareperformedusingtbeseformulaeonauniformplateandari'bbedplateseparately. Theagreementbeteenthepredictedandtheexperimenta1resuhsisfairlygood. keywordsIairbornenoise,[link widoczny dla zalogowanych], structurebornenoise, cabinnoise, separating. soundintensitymethod
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