【英文标准名称】:Fansforgeneralpurposes-Methodsofnoisetesting-Airbornenoiseemittedbysmallair-movingdevices-Section6:Airbornenoiseemittedbysmallair-movingdevices
【原文标准名称】:普通用途风扇.噪声试验方法.小型空气推动装置发出的空气噪声
【标准号】:BS848-2.6-2000
【标准状态】:作废
【国别】:英国
【发布日期】:2000-03-15
【实施或试行日期】:2000-03-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:噪声(环境的);空气噪声测量;通风机;声功率;声压;声学;声学测量;试验结果
【英文主题词】:Acousticmeasurement;Acoustics;Measurementofairbornenoise;Noise(environmental);Soundpower;Soundpressure;Testresults;Ventilators
【摘要】:1ThisInternationalStandardspecifiesamethodformeasuringtheairbornenoiseemittedbysmallair-movingdevicessuchasthoseusedforcoolingelectronic,electricalandmechanicalequipment.Theseair-movingdevicesincludesuchtypesaspropellerfans,tube-axialfans,vane-axialfans,centrifugalblowers,transverseblowers,cabinetblowersandvariationsofthesetypes.ThisInternationalStandarddescribesamethodandthetestapparatusfordeterminingandreportingtheairbornenoiseemittedbysmallair-movingdevicesasafunctionoftheairflowandthefanstaticpressuredevelopedbytheair-movingdeviceonthetestapparatus.Itisintendedforusebyair-movingdevicemanufacturers,bymanufacturerswhouseair-movingdevicesforcoolingelectronicequipmentandsimilarapplications,andbytestinglaboratoriesonbehalfofthesemanufacturers.ResultsofmeasurementsmadeinaccordancewiththisInternationalStandardareexpectedtobeusedforengineeringinformationandperformanceverification,andthemethodmaybecitedinpurchasespecificationsandcontractsbetweenbuyersandsellers.Theultimatepurposeofthenoiseemissionmeasurementsistoprovidedatatoassistthedesignersofelectronic,electricalormechanicalequipmentwhichcontainsoneormoreair-movingdevices.2ThisInternationalStandardisapplicabletosmallair-movingdevicesusedforcoolingelectronicequipmentandforsimilarapplicationswherethetotalsoundpowerleveloftheair-movingdeviceisofinterest.Experimentaldatashowthatthismethodisusefuluptoanairflowof1m/sanduptoafanstaticpressureof750Pa.ThisInternationalStandardissuitablefortypetestsandprovidesamethodforair-movingdevicemanufacturers,equipmentmanufacturersandtestinglaboratoriestoobtaincomparableresults.ThemethoddefinedinthisInternationalStandard,byreferencetoISO7779,providesfordeterminationofsoundpowerlevelsinaqualifiedenvironment,usingeitheracomparisonmethodinareverberationroombasedonISO3741orISO3742oradirectmethodinessentiallyfree-fieldconditionsoverareflectingplanebasedonISO3744orISO3745.ThemethodspecifiedinthisInternationalStandardmaybeappliedtoair-movingdeviceswhichradiatebroad-bandnoise,narrow-bandnoise,ornoisethatcontainsdiscretefrequencycomponents.ThemethodspecifiedinthisInternationalStandardpermitsthedeterminationofnoiseemissionlevelsforanindividualunitundertest.Iftheselevelsaredeterminedforseveralunitsofthesameproductionseries,theresultsmaybeusedtodetermineastatisticalvaluefortheproductionseriesusingmethodsdescribedinISO7574-4orinISO9296.CAUTION-Vibration,flowdisturbances,insertionlossandotherphenomenamayalterradiatedsoundpowerintheactualapplication;therefore,theresultsofmeasurementsmadeinaccordancewiththisInternationalStandardmaydifferfromtheresultsobtainedwhenair-movingdevicesareinstalledinequipment.NOTE1ThisInternationalStandarddoesnotdescribemeasurementofthestructure-bornenoisegeneratedbyair-movingdevices,anditdoesnotcovermeasurementoftheaerodynamicperformanceofsuchdevices.
【中国标准分类号】:J72
【国际标准分类号】:17_140_20;23_120
【页数】:30P.;A4
【正文语种】:英语