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ID:43998137
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页数:18页
时间:2019-10-17
《AHRI 220-2007 Reverberation Room Qualification and Testing Procedures for Determining Sound Power of HVAC Equipment》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、AHRIStandard220(formerlyARIStandard220)2007StandardforReverberationRoomQualificationandTestingProceduresforDeterminingSoundPowerofHVACEquipmentIMPORTANTSAFETYDISCLAIMERAHRIdoesnotsetsafetystandardsanddoesnotcertifyorguaranteethesafetyofanyproducts,compone
2、ntsorsystemsdesigned,tested,rated,installedoroperatedinaccordancewiththisstandard/guideline.Itisstronglyrecommendedthatproductsbedesigned,constructed,assembled,installedandoperatedinaccordancewithnationallyrecognizedsafetystandardsandcoderequirementsappro
3、priateforproductscoveredbythisstandard/guideline.AHRIusesitsbesteffortstodevelopstandards/guidelinesemployingstate-of-the-artandacceptedindustrypractices.AHRIdoesnotcertifyorguaranteethatanytestsconductedunderitsstandards/guidelineswillbenon-hazardousorfr
4、eefromrisk.Note:ThisisanewAHRIStandard.ThisstandarddescribesthemethodologyfordeterminationofSoundPowerLevelsofbroad-band,and/ordiscrete-frequencynoise,andnarrow-bandnoisesourcesinreverberationrooms.ItisbasedonANSIS12.51/ISO:3741.Themethoddescribedhereinre
5、quiresreverberationroompre-qualificationthroughtestandtheuseoftheComparisonMethodtodetermineSoundPowerLevels.Thisstandardspecifiesthephysicalenvironment,proceduresandequipmenttoqualifythereverberationroombytest.Pre-qualifyingtheroomensuresadequatemodalden
6、sitywiththeuseofonesourcelocationtoobtainacceptableaccuracyandrepeatabilityofresults.TheReferenceSoundSource(RSS)usedfortheComparisonMethodreliesonAHRIStandard250toaccuratelycalibratetheRSSatallfrequenciesofinterest.TheuseoftheComparisonMethodreducesanumb
7、erofpotentialsourcesofdatacollectionandcalculationerrors.Thestandardcontainsinformationoninstrumentation,installationandoperationofthesource,proceduresfordeterminingthenumberofmicrophonepositionsorlengthoftraverse,andproceduresforthecalculationofSoundPowe
8、rLevels.ThisstandardismorerestrictivethanANSIStandardS12.51/ISO:3741,whichallowstheusertotestusingeithertheDirectMethodortheComparisonMethodandalsoallowstheusertoemployaspacewithgeneralcharacteristics.TheintentofANS
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