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12•NoiseguidelineNoiselevelPerceptionNoiseleveldB(A)SurroundingnoiseSamenoiseduringmiddayHowtofeel110Klaxon(1mdistance),soundfrompressmachineHearingdysfunction100Underneaththeelevatedrailwaytrackswhentrainsarerunning,soundofpiano90Intrains/AtthebowlingalleyExtremelynoisy80Intersectionofmainavenue/Bustrafficlevel70Onthestreet/TaxitrafficlevelNoisy60Insideofdepartmentstores/Normalconversation50QuietofficesIdeallevelfordailylife40Quietparks30SuburbanareaduringmidnightQuiet20Whisper60dB(A)50dB(A)1/240dB(A)1/4(2)RelationbetweennoiseandresidentialenvironmentTherighttableisshowingsurroundingnoiseenvironmentandhowpeoplefeeltowardthenoises(perception).Forexample,attheintersectionofmainavenue,thenoiselevelis80dB(A)andtheperceptionis“extremelynoisy”,however,T-1classofinsulatorcanlowerthenoiselevelto55dB(A)andtheperceptionbecomes“ideallevelfordailylife”.Tolowerthelevelto“quiet”,itrequiresT-4(40)classofperformance.Perceptiontowardnoisesvariesamongindividuals,however,itissaidthatwhenthenoiselevelisloweredby10dB(A),noiselevelpeoplefeeldownsbyhalf.ResidentialareainthesuburbStreetofofficebuildingsMotorwayResidentialareainthecityBesidetherailwaytracksbibibibihmmhmm
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13•Objective-basedrequiredsoundinsulationclassIndoornoiselevelOutdoornoiseleveldB(A)202530354045505560657075808590NoiselevelNoiseless––Veryquiet––Doesnotbothermuch––Noticeablenoise––Un-ignorablenoiseInfluencesonconversationortelephoneconversation20-30Whisperingcanbeheardat5mdistance31-35Conversationispossibleata10mdistance/Noinfluenceontelephoneconversation36-40Nomalconversation(within3m)/Telephoneconversationispossible41-50Loudconversation(3m)/Feeldifficultiesontelephoneconversation51-55Loudconversation(1m)/Hardtokeeptelephoneconversation56-Loudconversationclosetoeachother/Can'tkeeltelephoneconversationStudioAnechoicroomAnnouncestudioRadiostudioTVstudioMastercontrolroomGeneralofficeAssemblyhallMusichallTheater(medium)StagetheaterMovietheater.PlanetariumHalllobbyHospitalHearingtestroomSpecialpatient’sroomOperatingroom.Patient’sroomExaminingroomDrugstorageWaitingroomHotel.HousingStudyroomGuestroomBanquetroomLobbyGeneralofficeExecutiveroomMainconferenceroomReceptionroomBreakoutroomGeneralofficeroomTyping.computingroomPublicbuildingPublichallArtmuseum/MuseumLibraryGymnasiumwithpublichallIndoorsportsfacilitySchool.ChurchMusicroomAuditorium/ChapelLaboratory.GeneralclassroomCorridorCommercialbuildingMusiccaféJewelrystore.GalleryBookstoreGeneralshopsRestaurantDiningroom(Class15*)(Class20*)T-1(Class25)T-2(Class30)T-3(Class35)T-4(Class40)Inside()isformerclass*ClassforareferenceT-1(Class25)T-2(Class30)T-3(Class35)T-4(Class40)(Howtoreadthetable)(3)SelectionguidelinesSoundinsulationperformanceinwindowsanddoorsshouldbeselectedaccordingtoresidentialenvironments.Basically,thetablebelowandthe“Featureofourproducts”inthenextsectionarereferredforselecting.Pleasenotethateffectsofsoundinsulationvaryonalargescaledependingonsoundsources(e.g.trafficnoise,dog’sbarks)andwallstructures(e.g.wood,concrete).Whenthebuildingstandsonthestreetatwhereoutdoornoiselevelis70dB(A),andyouwouldliketokeepthenoiselevelinageneralofficeroomandabreakoutroomtothe45dB(A)asfollowingtherecommendedlevel,T-1classoffixturesispreferable.Forthecaseoutdoornoiselevelis80dB(A),T-3classoffixturesispreferable.Workplace·GeneralstreetsNoiseatthesubwayorintersectionofmainroadTokaidoLineShinkansen180km/h
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