ISO 11821-1997 声学可移动声屏障声衰减的现场测量

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【英文标准名称】:Acoustics-Measurementoftheinsitusoundattenuationofaremovablescreen
【原文标准名称】:声学可移动声屏障声衰减的现场测量
【标准号】:ISO11821-1997
【标准状态】:现行
【国别】:国际
【发布日期】:1997-04
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC43
【标准类型】:()
【标准水平】:()
【中文主题词】:噪声降低;定义;声学测量;试验;声学;遮板(隔墙);就地;现场试验;噪声;噪声抑制
【英文主题词】:Acousticmeasurement;Acousticscreen;Acoustics;Definitions;Fieldtesting;Insitu;Measuringtechniques;Mobile;Noise;Noiseabatement;Noisecontrol(acoustic);Noisereduction;Relocatablepartitions;Screens(partitions);Sonictesting;Soundattenuation;Soundcontrolmeans;Soundpressurelevel;Transportablestructures
【摘要】:ThisInternationalStandardspecifiesmethodsforevaluatingtheinsitusoundattenuationperformanceofaremovablescreen,eitherindoorsoroutdoors.Thisengineeringgrademethodisbasedonaninsertiontossmeasurementthatcanbecarriedouteitherwithshieldingoftheactualsoundsource(s)orusinganartificialsoundsource.Thesoundattenuationperformanceachievedbysuchascreen,asevaluatedbythepresentInternationalStandard,dependson:—diffractionaroundtheedgesofthescreen;—transmissionthroughthecomponentsofthescreen;—absorptionofthepanelsofthescreen,aswellasinitssurroundings;—theroominwhichthescreenstandsifindoors.Whenaspecificworkstationistobeshielded,theinsitusoundattenuationvaluedescribestheeffectofthescreen.However,whenacompleteareaistobeshielded,theperformanceofthescreenwillvarydependingonthepositionsusedformeasurement.Therefore,itisrecommendedthatthemaximumandminimumvaluesofsoundattenuationaregiven.Thesoundattenuationperformanceisdeterminedintermsofinsertionloss.Whenassessingtheperformanceofascreenlocatedindoors,theroomgeometryandreflectionsfromwalls,ceilingsandroomfittingswillinfluencetheperformance.Asaconsequence,thecomparisonofscreenperformancecanonlybemadeifthetestconditionsareidentical.ThisInternationalStandardisapplicabletoscreenswithheightandlengthgreaterthan1,5m.However,itmayalsobeusedforsmallerscreensprovidedthattheinterestedpartiescometoanagreementonthis.Asenvironmentalconditionscanaffectthemeasurementsoutdoors,itisrecommendedthatmeasurementsshouldberestrictedtowithin25mofthescreen.However,measurementsmayalsocoveragreaterdistanceprovidedthattheinterestedpartiescometoanagreementonthis.Differencescanoccurbetweeninsitutestresults.Therefore,comparisonoftheperformanceofdifferentscreenscanbemadeonlyonthebasisofdatabasedonthesamemeasurementmethodperformedatthesamelocation.ThisInternationalStandardappliestoacompletescreenonlyandnottoindividualcomponentsfromwhichitismade.Soundinsulationandsoundabsorptionforscreencomponents(suchaspanelelements,doors,windows)shouldbemeasuredaccordingtootherrelevantstandards.ThisInternationalStandardisnotapplicabletoopenplanofficesscreensnortooutdoorbarriersdealingwithcommunitynoise.Itisalsonotintendedforqualificationpurposes.
【中国标准分类号】:P13
【国际标准分类号】:17_140_99
【页数】:10P.;A4
【正文语种】:英语