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1、AHRIStandard260(formerlyARIStandard260)2001StandardforSoundRatingofDuctedAirMovingandConditioningEquipmentIMPORTANTSAFETYRECOMMENDATIONSItisstronglyrecommendedthattheproductbedesigned,constructed,assembledandinstalledinaccordancewithnationallyrecognizedsafetyrequirementsapp
2、ropriateforproductscoveredbythisstandard.AHRI,asamanufacturers'tradeassociation,usesitsbesteffortstodevelopstandardsemployingstate-of-the-artandacceptedindustrypractices.However,AHRIdoesnotcertifyorguaranteesafetyofanyproductsorsystemsdesigned,tested,rated,installedoroperat
3、edinaccordancewiththesestandardsorthatanytestsconductedunderitsstandardswillbenon-hazardousorfreefromrisk.Note:Thisisanewstandard.Foreword:DuctedEquipmentmustbesoundratedinrelationtoitsvariousindividualSoundComponentstodescribeitacousticallyandtoprovidethenecessaryinformati
4、onforpredictingapplicationsoundlevels.ThisstandardaddressesthesoundratingofthesevariousSoundComponents.Ductedair-conditioningequipmentcanhaveducteddischarge,ductedinlet,freeinlet(orfreedischarge)combinedwithcasingradiated,orcasingradiatedSoundComponentsdependingonitsspecifi
5、cmanufacturedconfiguration.AllSoundComponentsareacousticallydescribed/ratedbyutilizinga"Mapped"SoundRatingapproachthatistypicallyreferencedtotheproduct'ssupplyfanoperatingmap.ThesupplyfaniscontainedintheBaseUnitoftheproduct.Inaddition,thisstandarddefinesanapproachtoaccountf
6、orandaddtheacousticaleffectsofproductAppurtenances(suchasmodulationdevicesorinlet/dischargeplenums)andOtherSoundSources(suchastherefrigerationcircuit,exhaustfans,etc.)totheBaseUnitMappedSoundRating.Thus,MappedSoundRatingscanbedevelopedforagivenproductconfigurationandeachofi
7、tsvariousSoundComponents.AllductedproductSoundComponentsareratedutilizingaReverberationRoomTechnique,modeledafterAMCAStandard300.ReverberationroomtestsareconductedusingaComparisonMethodandaReferenceSoundSourcecalibratedinaccordancewithAHRIStandard250.Soundratingsareinthefor
8、mofOctaveBandSoundPowerLevels(dB)from125to8,000HzderivedfromOne-ThirdOctaveBand(dB
