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IEC 60268-4-2004 声系统设备.第4部分:传声器

作者:标准资料网 时间:2024-05-17 06:51:06  浏览:9163   来源:标准资料网
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【英文标准名称】:Soundsystemequipment-Part4:Microphones
【原文标准名称】:声系统设备.第4部分:传声器
【标准号】:IEC60268-4-2004
【标准状态】:作废
【国别】:国际
【发布日期】:2004-02
【实施或试行日期】:2004
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/TC100
【标准类型】:()
【标准水平】:()
【中文主题词】:作标记;电压测量;测量;声传输;分类;电声器件;非线性;特性;噪声;畸变系数;影响量;传输系统;频率曲线;传声器;动力学;频率响应;对称;波幅;传输系数;声压;声压级;电气工程;参数;电声学;环境条件;传输装置;自然噪声压力;参考弧线;参考坐标系;测量技术;阻抗;电气设备;试验
【英文主题词】:Acoustoelectricdevices;Amplitude;Classification;Distortionfactors;Dynamics;Electricalengineering;Electricalequipment;Electroacoustics;Environmentalcondition;Frequencycurve;Frequencyresponse;Impedance;Influencequantity;Marking;Measurement;Measuringtechniques;Microphones;Naturalnoisevoltage;Noise;Non-linearity;Operatingconditions;Parameters;Properties;Referenceaxes;Referencecurve;Soundpressure;Soundpressurelevel;Soundtransmission;Symmetry;Testing;Transfercoefficient;Transmissiondevices;Transmissionsystems;Voltagemeasuring
【摘要】:Specifiesmethodsofmeasurementfortheelectricalimpedance,sensitivity,directionalresponsepattern,dynamicrangeandexternalinfluencesofsoundsystemmicrophones,andalsogivesrecommendationsastocharacteristicstobespecified.Itapplies
【中国标准分类号】:M72
【国际标准分类号】:33_160_50
【页数】:52P.;A4
【正文语种】:英语


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【英文标准名称】:StandardTestMethodforYarnNumberUsingAutomaticTester
【原文标准名称】:用自动试验机测定纱线支数的标准试验方法
【标准号】:ASTMD6587-2000(2006)e1
【标准状态】:现行
【国别】:
【发布日期】:2000
【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】:D13.58
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:lineardensity;yarn;yarnnumber
【摘要】:Thistestmethodforyarnnumberissatisfactoryforacceptanceofcommercialshipmentsandisusedinthetrade.5.1.1IncaseofadisputearisingfromdifferencesinreportedtestresultswhenusingthisTestMethodforacceptancetestingofcommercialshipments,thepurchaserandthesuppliershouldeitherusetherefereeTestMethodD1907foryarnnumberorconductcomparativeteststodetermineifthereisastatisticalbiasbetweentheirlaboratories.Competentstatisticalassistanceisrecommendedfortheinvestigationofbias.Asaminimum,thetwopartiesshouldtakeagroupoftestspecimensthatareashomogeneousaspossibleandthatarefromalotofmaterialofthetypeinquestion.Thetestspecimensshouldthenberandomlyassignedinequalnumberstoeachlaboratoryfortesting.Theaverageresultsfromthetwolaboratoriesshouldbecomparedusingappropriatestatisticalanalysisandaprobabilitylevelchosenbythetwopartiesbeforethetestingisbegun.Ifabiasisfound,eitheritscausemustbefoundandcorrectedorthepurchaserandthesuppliermustagreetointerpretfuturetestresultswithconsiderationtotheknownbias.Thistestmethodisalsousedforthequalitycontrolforbothfilamentandspunyarns.1.1Thistestmethodcoversthemeasurementofyarnnumberoffilamentandspunyarnsusingautomatedtesters.Someoftheinstrumentsarestand-aloneandothersareoptionalmodulesforinstrumentsthatperformadditionaltests.1.1.1Theinstrumentsarecapableofmeasuringyarnnumbersupto4000dtex(3600denier).Note1Fordeterminationofyarnnumberbyuseofreelandbalance,refertoTestMethodD1907.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Withinthetext,theinch-poundunitsareinparentheses.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultininaccuraciesofresults.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W04
【国际标准分类号】:59_080_20
【页数】:6P.;A4
【正文语种】:


【英文标准名称】:SteelU-tubesfortubularheatexchangers;technicaldeliveryconditions
【原文标准名称】:圆管式热交换器用U型钢管.技术规范
【标准号】:DIN28179-1989
【标准状态】:作废
【国别】:德国
【发布日期】:1989-11
【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】:U形管;检验;规范(审批);名称与符号;管式热交换器;验收规范;钢管;作标记;包装件;尺寸;钢;热交换器;管;定单
【英文主题词】:Acceptancespecification;Designations;Dimensions;Heatexchangers;Inspection;Marking;Orders(salesdocuments);Packages;Pipes;Specification(approval);Steelpipes;Steels;Tubeheatexchangers;U-tubes
【摘要】:ThisU-steeltubesapplytotubularheatexchangerswhicharepredominantlyusedinprocessplants.
【中国标准分类号】:G93;H48
【国际标准分类号】:23_040_10
【页数】:12P;A4
【正文语种】:德语



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