EN 60444-9-2007 石英晶体元件参数的测量.第9部分:压电晶体元件谐振的测量
时间:2024-05-21 07:40:28 来源: 标准资料网 作者：标准资料网 阅读：8273
【英文标准名称】:Measurementofquartzcrystalunitparameters-Part9:Measurementofspuriousresonancesofpiezoelectriccrystalunits(IEC60444-9:2007);GermanversionEN60444-9:2007
【原文标准名称】:石英晶体元件参数的测量.第9部分:压电晶体元件谐振的测量
【标准号】:EN60444-9-2007
【标准状态】:现行
【国别】:
【发布日期】:2007-12
【实施或试行日期】:2007-12-01
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:晶体(电子);电气工程;电子工程;滤波器晶体;阻抗;干扰;测量;测量技术;参数;压电器件;共振频率;谐振器
【英文主题词】:Crystals(electronic);Electricalengineering;Electronicengineering;Filtercrystals;Impedance;Interferences;Measurement;Measuringtechniques;Parameters;Piezoelectricdevices;Resonantfrequency;Resonators
【摘要】:
【中国标准分类号】:L21
【国际标准分类号】:31_140
【页数】:16P.;A4
【正文语种】:英语
【英文标准名称】:Electricclotheswashingmachinesforhouseholduse--Methodsformeasuringtheperformance
【原文标准名称】:家用电动洗衣机.性能测量方法
【标准号】:JISC9811-1999
【标准状态】:现行
【国别】:日本
【发布日期】:1999-06-20
【实施或试行日期】:
【发布单位】:日本工业标准调查会(JP-JISC)
【起草单位】:TechnicalCommitteeonElectricityTechnology
【标准类型】:()
【标准水平】:()
【中文主题词】:洗衣设备;家用洗衣机;电驱动装置;性能试验;家用设备
【英文主题词】:householdequipment;;;;performancetesting
【摘要】:この規格は,日本国において使用する家庭用の電熱素子をもつ,又はもたない衣類用電気洗濯機。脱水機.洗濯脱水機,及び洗濯乾燥機の性能測定方法について規定する。
【中国标准分类号】:Y62
【国际标准分类号】:97_060
【页数】:31P;A4
【正文语种】:日语
【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