【英文标准名称】:Measurementofairbornenoiseemittedbymachines;envelopingsurfacemethod,constructionequipment
【原文标准名称】:机器空气噪声的测量.包络面法.建筑设备
【标准号】:DIN45635-33-1979
【标准状态】:现行
【国别】:德国
【发布日期】:1979-07
【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】:声级计;风;频率响应;噪声;操作台;测量仪器;坐标(数学);机械工程;定义;声源;建筑机械;数学计算;噪声测量;声学;布置;传声器;测量
【英文主题词】:
【摘要】:Measurementofairbornenoiseemittedbymachines;envelopingsurfacemethod;constructionequipmentDieseNormlegtdieGer?uschmessunganBaumaschinennachdemHüllfl?chen-Verfahrenfest,dasinDIN45635Teil1?Ger?uschmessunganMaschinen;Lu
【中国标准分类号】:Z32
【国际标准分类号】:17_140_20;91_220
【页数】:9P;A4
【正文语种】:德语


【英文标准名称】:Methodsofmeasurementforconsumer-usedigitalVTRs-Electronicandmechanicalperformances
【原文标准名称】:消费者使用的数字VTRs的测量方法.电子和机械性能
【标准号】:IEC62122-2002
【标准状态】:现行
【国别】:国际
【发布日期】:2002-03
【实施或试行日期】:
【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】:译码;盒式录像带;质量;娱乐电子学;额定值;视频设备;录像带;家用盒式录象机制式;代码;磁带录像机;电性质和电现象;磁带记录;视频记录;机械性能;录像系统;数字记录法;数字的;数字录制技术;定义;测量技术;评定;规范(验收)
【英文主题词】:Codes;Decoding;Definitions;Digital;Digitalrecordingmethods;Digitalrecordingtechnique;Electricalpropertiesandphenomena;Entertainmentelectronics;Evaluations;Magnetictaperecordings;Measuringtechniques;Mechanicalproperties;Quality;Ratings;Specification(approval);VHS;Videocassettes;Videoequipment;Videorecording;Videorecordingsystems;Videotaperecorders;Videotapes
【摘要】:Thisstandardspecifiesthebasicmethodsofmeasurementforevaluatingtheelectronicandmechanicalperformancesofconsumer-usedigitalVTRs.TheformatsofopenreelVTRs,Beta,VHS,and8mmVTRshavebeenstandardized.MethodsofmeasurementfortheseanalogueVTRshavebeenstandardizedinIEC61041-1,IEC61041-2,IEC61041-3,IEC61041-4,IEC61041-5,andIEC61146-3.DigitalVTR6,35mmDVformatand12,65mmD-VHSformathavenowbeenbroughtonthemarket.Themethodsofmeasurementfortheseconsumer-usedigitalVTRsshouldbespecifiedandstandardized.Withthesemeasurementtechniques,someitemsfortheevaluationofperformancesspecifictodigitalVTRshavealsobeenincluded.Therearetwoobjectivesfortheproposedmethodsofmeasurement.Oneistochecktheinterchangeabilityandcharacteristicsoftheequipmentundertestwhichareindispensabletomanufacturers,andtheotheristoevaluatethequalityofimageandsound,whichconcernsthecustomer.Thelatterisapriorityforconsumersatisfaction.Sinceaconsumercanuseonlygeneral-purposeinstruments,anytestwhichneedsdismantlingofapparatusandrequiresspecialinstrumentsisinprinciplenotspecified.Aserrorrateisimportantfordigitalequipment,anexampleofamethodformeasuringerrorrateisgiveninannexA.
【中国标准分类号】:L04
【国际标准分类号】:33_160_40
【页数】:47P.;A4
【正文语种】:英语