ASTM E336-2009 建筑物内部空间中空气声隔声测量的标准试验方法

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【英文标准名称】:StandardTestMethodforMeasurementofAirborneSoundAttenuationbetweenRoomsinBuildings
【原文标准名称】:建筑物内部空间中空气声隔声测量的标准试验方法
【标准号】:ASTME336-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E33.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:airbornesoundtransmissionloss;apparentsoundtransmissionclass;apparenttransmissionloss;fieldsoundtransmissionclass;fieldtransmissionloss;flankingtransmission;noiseisolationclass;noisereduction;normalizednoiseisolationclass;
【摘要】:Themainpartofthisstandardusesproceduresoriginallydevelopedforlaboratorymeasurementsofthetransmissionlossofpartitions.Theseproceduresassumethattheroomsinwhichthemeasurementsaremadehaveasoundfieldthatreasonablyapproximatesadiffusefield.Soundpressurelevelsinsuchroomsarereasonablyuniformthroughouttheroomandaveragelevelsvaryinverselywiththelogarithmoftheroomsoundabsorption.Notallroomswillsatisfytheseconditions.Practicalexperienceandcontrolledstudies(1)haveshownthatthetestmethodisapplicabletosmallerspacesnormallyusedforworkorliving,suchasroomsinmulti-familydwellings,hotelguestrooms,meetingrooms,andofficeswithvolumeslessthan150cubicmeters.ThemeasuresappropriateforsuchspacesareNR,NNR,andATL.ThecorrespondingsinglenumberratingsareNIC,NNICandASTC.TheATLandASTCmaybemeasuredbetweenlargerspacesthatmeetalimitationonabsorptioninthespacestoprovideuniformsounddistribution.AnnexA2wasdevelopedforuseinspacesthatareverylarge(volumeof150m3orgreater).Soundpressurelevelsduringtestingcanvarymarkedlyacrosslargeroomssothatthedegreeofisolationcanvarystronglywithdistancefromthecommon(separating)partition.Thisprocedureevaluatestheisolationobservednearthepartition.TheappropriatemeasureisNR,andtheappropriatesinglenumberratingisNIC.Itissometimesnecessarytodemonstratethatthesoundinsulationofapartitionmeetsorexceedsaspecificcriterion.AnnexA1providesadditionalrequirements,anddescribeshowshieldingprocedurescanbeusedtoreduceflankingtransmissioninstagestoshowthatapartitionhasachievedaminimumvalueoftheFTLorminimumvalueoftheFSTCwhichmaymeetorexceedthecriterion.Ifitisdemonstratedthatnosignificantflankingexiststhroughshieldingofallpotentialflankingpaths,then,andonlythen,FTLandFSTCmaybereportedwithoutqualification.Note38212;Measuringthesoundtransmissionlosspropertiesofapartitionitselftodemonstratethatitmeetsorexceedsaspecificcriterionisverydifficultinthefieldduetothepresenceofflanking(2,3).Roomvolumeandabsorptionrequirementsmustalsobemet.Severalmetricsareavailableforspecificuses:NoiseReduction(NR)andNoiseIsolationClass(NIC)8212;Describethesoundisolationbetweentwospacesintheconditionfound.Themeasurementmethodvariesdependingonthesizeofthespaces.Wheneachspaceislessthan150cubicmeters,soundlevelsareaveragedoverthespace.NRvaluesforsuchspaceswhenunfurnishedwillusuallybelowerthanvaluesmeasuredwhenthespacesarefurnished.Thesevaluesrelatedirectlytothesoundattenuationexperiencedbyoccupantsofthespacesfortheconditionevaluated,includingtheeffectsofflankingandroomabsorption,andnotjusttotheperformanceofapartition.Thereforeresultsmaybedifferentwhenmeasuredindifferentdirections.Wheneitherofthespacesis150cubicmetersormore,soundlevelsaremeasuredinanareaclosetothepartitiononeachside.Theseresultsincludesomeeffectofroomabsorptionandflanking,buttheeffectofroomabsorptionislesswhenmeasuredclosetothepartition.NormalizedNoiseReduction(NNR)andNormalizedNoiseIsolationClass(NNIC)8212;Givethesoundisolationbetweentworesidentialorofficespacesadjustedtostandardizedroomconditions.Thisnormalizationisusuallydonetocompensateforalackorexcessoffurnishingsintherooms.NNRandNNICshallnotbeusedforspacesof150cubicmetersorlarger.Thesevaluesareintendedtore.........
【中国标准分类号】:P31
【国际标准分类号】:91_120_20
【页数】:12P.;A4
【正文语种】:英语