DIN 20078-10-1982 液压动力.标准压力系列、带对接法兰4螺栓的R型软管管件.尺寸

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【英文标准名称】:Woodendowels;dimensions,specifications
【原文标准名称】:定缝木钉.第1部分:尺寸、技术规范
【标准号】:DIN68150-1-1989
【标准状态】:现行
【国别】:德国
【发布日期】:1989-07
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:交货条件;木材;紧固件;定义;定位销;尺寸;木质板材;规范(审批);验收规范;作标记;锁定装置及定位装置
【英文主题词】:deliveryconditions;acceptancespecification;locatingpins;specification(approval);woodbasedsheetmaterials;fasteners;dowels;dimensions;marking;wood;lockingandlocatingdevices;definitions
【摘要】:Thestandardspecifiesdimensionsandspecificationsforwoodendowelsfortheconnectionbyhandorbymachineofwoodandwoodbasedpanels.
【中国标准分类号】:B69
【国际标准分类号】:79_080
【页数】:4P;A4
【正文语种】:德语


【英文标准名称】:Acoustics-Determinationofsoundpowerlevelsofnoisesourcesusingsoundintensity-Part3:Precisionmethodformeasurementsbyscanning
【原文标准名称】:声学.利用声音强度测定噪声源功率级.第3部分:扫描测量精度法
【标准号】:ISO9614-3-2002
【标准状态】:现行
【国别】:国际
【发布日期】:2002-11
【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】:噪声源;声功率;噪声;噪声测量;方法;声学试验;声学测量;声强;扫描;测定;扫描器;声源;连续的;机器;声学;声级;测量;特性;定义;噪声辐射
【英文主题词】:Acousticmeasurement;Acoustictesting;Acoustics;Calibration;Continuous;Definitions;Determination;Earprotectors;Externalnoise;Intensity;Machinenoise;Machines;Measurement;Measuringenvironment;Measuringincertainity;Measuringinstruments;Measuringsurfaces;Measuringtechniques;Methods;Noise;Noiseemissions;Noise(environmental);Noisemeasurements;Noisesources;Precision;Properties;Scanners;Scanning;Soundfields;Soundintensity;Soundlevel;Soundpower;Soundpressure;Soundsources;Specification(approval);Temperature;Testing;Winds
【摘要】:1ThispartofISO9614specifiesamethodformeasuringthecomponentofsoundintensitynormaltoameasurementsurfacewhichischosensoastoenclosethesoundsource(s)ofwhichthesoundpowerlevelistobedetermined.Surfaceintegrationoftheintensitycomponentnormaltothemeasurementsurfaceisapproximatedbysubdividingthemeasurementsurfaceintocontiguouspartialsurfaces,andscanningtheintensityprobeovereachpartialsurfacealongacontinuouspathwhichcoverstheextentofthepartialsurface.Themeasurementinstrumentdeterminestheaveragednormalintensitycomponentandaveragedsquaredsoundpressureoverthedurationofeachscan.Thescanningoperationcanbeperformedeithermanuallyorbymeansofamechanicalsystem.Theoctavebandorband-limitedweightedsoundpowerleveliscalculatedfromthemeasuredone-third-octave-bandvalues.Themethodisapplicabletoanysourceforwhichaphysicallystationarymeasurementsurfacecanbedefined,andonwhichthesoundgeneratedbythesourceundertestandbyothersignificantextraneoussourcesarestationaryintime.Thesourceisdefinedbythechoiceofmeasurementsurface.ThemethodisapplicableinspecifictestenvironmentsfulfillingallrelevantrequirementsofthispartofISO9614.ThispartofISO9614specifiescertainancillaryprocedures,describedinannexC,tobefollowedinconjunctionwiththesoundpowerdetermination.Theresultsareusedtoindicatethequalityofthedetermination,andhencethegradeofaccuracy.IfthequalityofthedeterminationdoesnotmeettherequirementsofthispartofISO9614,thetestprocedureshallbemodifiedinthemannerindicated.ThispartofISO9614isnotapplicabletoanyfrequencybandinwhichthesoundpowerofthesourceisfoundtobenegativeonmeasurement.2ThispartofISO9614isapplicabletosourcessituatedinanyenvironmentwhichisneithersovariableovertimeastoreducetheaccuracyofthemeasurementofsoundintensitytoanunacceptabledegree,norsubjectstheintensitymeasurementprobetogasflowsofunacceptablespeedorunsteadiness(see5.2.2,5.3and5.4).InsomecasesitwillbefoundthatthetestconditionsaretooadversetoallowtherequirementsofthispartofISO9614tobemet.Forexample,extraneousnoiselevelscanexceedthedynamiccapabilityofthemeasuringinstrumentorcanvarytoanexcessivedegreeduringthetest.InsuchcasesthemethodgiveninthispartofISO9614isnotsuitableforthedeterminationofthesoundpowerlevelofthesource.
【中国标准分类号】:A42
【国际标准分类号】:17_140_01
【页数】:34P;A4
【正文语种】:英语