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20RelatedcatalogsThisisoneofderivedunits,whichhasaspecificnameintheISOunit.Thisexpressespressureandstresslevel.1Pa=1N/m2=0.101972kgf/m2[9.80665Pa=1kgf/m2]Thismeanswaterintrusionintotheinsidefloororwallduetorainwater.Intermsofwindowsanddoorset,thismeansleaking,splash,blowoutandoverflowtotheoutsideofframes.Thisisperceptionoftheheatflowfromthehighertemperaturesidetothelowertemperatureside,throughwallbody,whenthetemperaturesoftheindoorsideandtheoutdoorsidearedifferent.Thermalconductivityisquantitiesofheatflowpersquaremeterperhour,whenthedifferencebetweenindoorairtemperatureandoutdoorairtemperatureis1ºC.ThisisexpressedbyW/m²•K.Whentheindoorairtemperatureistiandtheoutdoortemperatureisto,thethermalconductivity,K-value,isderivedbythefollowingformula,withthequantitiesofheatflowQandtheareaofwallbodyA(m²)throughwhichtheheattransmits.K-value=Q/A•(ti-to)Thisisaninversenumberofthethermalconductivity(R-value=1/K-value).Unitism²•K/W.DifferencebetweenaverageindoortemperaturesandoutdoortemperaturesforadayiscalledDegreeday.TotalofthisDegreedayoverayeariscalledHeatingDegreeDays.Forexample,whentheaverageoutdoortemperatureis10ºC,andifyouwouldliketoheatuptheindoortemperatureto18ºC,theDegreedayofthedaywillbe18–10=8ºC.Soundisvibration.FrequenciesofvibrationperonesecondarecalledFrequency.Thehigherthevibrationfrequencies(highfrequencies),thehigherthesoundbecomes.Itissaidthattherangeofsoundhumancannoticeisapproximatelybetween20to20.000Hz.Forexample,inthetimetonebyJapanBroadcastingCorporation,NHK,thefirstthreebeepsis440Hzandthelastonebeepis880Hz.Thisisacriterionusedtomeasuresoundlevelphysically(energetically).Soundwavecausessmallpressurechangestotheair(atmosphericpressure).Ourdailyconversationshaveabout60dBsoundpressure,andtheloudestvoicebyasingercanreachto100dBsoundpressure.[Differencesbetweenphoneanddecibel]Lowfrequency-soundsreachtohumanearsassmallersoundthanpracticalsounds.Sound-levelmeterisdesignedtoimitatethisfeatureofhumanears.Valuemeasuredbythissound-levelmeter’sA-featureisphoneordecibel(dB(A)).Nearlyidenticalsoundlevelsassoundsheardbyhumanearsisdisplayedonthemeter.Soundpressurelevel,dB(decibel),usedtomeasuresoundtransmissionlossetc,isdescribedbyphysicalquantities(practicalvolume),andnotbysensoryquantities.*1Pa(Pascal)*2Waterleakage*3Thermalconductivity*4Thermalresistance*5Heatingdegreeday(Degreeday)*6FrequencyUnit:Hz(Hertz)*7SoundpressurelevelUnit:dB(decibel)RelatedcatalogsExplanationofwordsandtermsCatalognameCatalogcode.InstructionmanualMB3800.KnowledgeabouthousingandcondensationTX0900.Explanatoryvideoofair,waterandstructuralperformanceofaluminumwindowsanddoorsVT0600
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