ISO 10534-2-1998 声学阻抗管中吸声系数和比阻抗率的测量第2部分:传递函数法
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【英文标准名称】:Acoustics-Determinationofsoundabsorptioncoefficientandimpedanceinimpedancetubes-Part2:Transfer-functionmethod
【原文标准名称】:声学阻抗管中吸声系数和比阻抗率的测量第2部分:传递函数法
【标准号】:ISO10534-2-1998
【标准状态】:现行
【国别】:国际
【发布日期】:1998-11
【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】:测定;声学;声音吸收;传输;声学测量;声学试验;吸声系数;建筑声学;吸声;声试验
【英文主题词】:Acousticabsorption;Acousticmeasurement;Acoustictesting;Acoustics;Buildingacoustics;Determination;Soundabsorption;Soundabsorptioncoefficient;Transmission
【摘要】:Thistestmethodcoverstheuseofanimpedancetube,twomicrophonelocationsandadigitalfrequencyanalysissystemforthedeterminationofthesoundabsorptioncoefficientofsoundabsorbersfornormalsoundincidence.Itcanalsobeappliedforthedeterminationoftheacousticalsurfaceimpedanceorsurfaceadmittanceofsoundabsorbingmaterials.Sincetheimpedanceratiosofasoundabsorptivematerialarerelatedtoitsphysicalproperties,suchasairflowresistance,porosity,elasticityanddensity,measurementsdescribedinthistestmethodareusefulinbasicresearchandproductdevelopment.ThetestmethodissimilartothetestmethodspecifiedinISO10534-1inthatitusesanimpedancetubewithasoundsourceconnectedtooneendandthetestsamplemountedinthetubeattheotherend.However,themeasurementtechniqueisdifferent.Inthistestmethod,planewavesaregeneratedinatubebyanoisesource,andthedecompositionoftheinterferencefieldisachievedbythemeasurementofacousticpressuresattwofixedlocationsusingwall-mountedmicrophonesoranin-tubetraversingmicrophone,andsubsequentcalculationofthecomplexacoustictransferfunction,thenormalincidenceabsorptionandtheimpedanceratiosoftheacousticmaterial.Thetestmethodisintendedtoprovideanalternative,andgenerallymuchfaster,measurementtechniquethanthatofISO10534-1.ComparedwiththemeasurementofthesoundabsorptioninareverberationroomaccordingtothemethodspecifiedinISO354,therearesomecharacteristicdifferences.Thereverberationroommethodwill(underidealconditions)determinethesoundabsorptioncoefficientfordiffusesoundincidence,andthemethodcanbeusedfortestingofmaterialswithpronouncedstructuresinthelateralandnormaldirections.However,thereverberationroommethodrequirestestspecimenswhichareratherlarge,soitisnotconvenientforresearchanddevelopmentwork,whereonlysmallsamplesoftheabsorberareavailable.Theimpedancetubemethodislimitedtoparametricstudiesatnormalincidencebutrequiressamplesofthetestobjectwhichareofthesamesizeasthecross-sectionoftheimpedancetube.Formaterialsthatarelocallyreacting,diffuseincidencesoundabsorptioncoefficientscanbeestimatedfrommeasurementresultsobtainedbytheimpedancetubemethod.Fortransformationofthetestresultsfromtheimpedancetubemethod(normalincidence)todiffusesoundincidence,seeannexF.
【中国标准分类号】:A42
【国际标准分类号】:17_140_01
【页数】:27P;A4
【正文语种】:英语
【英文标准名称】:Radiationprotectioninstrumentation-Ambientand/ordirectionaldoseequivalent(rate)metersand/ormonitorsforbeta,Xandgammaradiation(IEC60846:2002,modified);GermanversionEN60846:2004
【原文标准名称】:辐射防护仪.β、X和γ辐射的环境和(或)定向剂量当量(率)测量仪和(或)监测仪
【标准号】:EN60846-2004
【标准状态】:现行
【国别】:
【发布日期】:2005-03
【实施或试行日期】:2005-03-01
【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】:输出测量器;辐射防护;剂量计;剂量当量率计;电气工程;定义;电性质和电现象;监督(认可);γ辐射;辐照率表;功能特性;电性能;β粒子;X射线;机械性能;剂量当量;仪器装置;使用说明;波动;核技术;辐射;核电厂;监视器;测量仪器;核辐射;规范(验收);辐射测量;安全工程;剂量;试验条件;β辐射;试验;特性;测量
【英文主题词】:Betaradiation;Beta-particles;Characteristics;Definition;Definitions;Dose;Doseequivalent;Doseequivalentratemeters;Dosimeters;Electricalengineering;Electricalproperties;Electricalpropertiesandphenomena;Exposure-ratemeters;Fluctuation;Functionalproperties;Gamma-radiation;Instructionsforuse;Instrumentation;Measurement;Measuringinstruments;Mechanicalproperties;Monitors;Nuclearpowerplants;Nuclearradiation;Nucleartechnology;Outputmeters;Properties;Radiation;Radiationmeasurement;Radiationprotection;Safetyengineering;Specification(approval);Surveillance(approval);Testing;Testingconditions;X-rays
【摘要】:
【中国标准分类号】:F84
【国际标准分类号】:17_240
【页数】:53P.;A4
【正文语种】:英语
【英文标准名称】:Postalservice-Qualityofservice-Measurementofthetransittimeofend-to-endservicesforsinglepieceprioritymailandfirstclassmail(includesAmendmentA1:2007);EnglishversionofDINEN13850:2007-06
【原文标准名称】:邮政服务.服务质量.单件有优先权邮件和一级邮件点到点服务运送时间的测量(包括修改件A1:2007)
【标准号】:DINEN13850-2007
【标准状态】:现行
【国别】:德国
【发布日期】:2007-06
【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】:定义;边境跨越;信函;邮政;方法学;方法;邮寄;优先顺序;质量保证;质量检查;质量控制;质量要求;随机试样;表示法;运转时间;服务;时间测量
【英文主题词】:
【摘要】:ThisEuropeanStandardspecifiesmethodsformeasuringtheend-to-endtransittimeofthedomesticandcross-borderprioritysinglepiecelettermail,collected,processedanddistributedbypostalserviceoperators.Itconsidersmethodsusingarepresentativeend-to-endsampleofalltypesofsinglepieceaddressedlettermail.End-to-endisdefinedasfromthepointmailisplacedintothecollection/acceptancesystemundertheresponsibilityofthepostaloperators,tothefinaldeliverypointundertheresponsibilityofthepostaloperators.Theoveralltransittimequality-of-serviceresultistobeexpressedaspercentageofmaildeliveredwithinJ+ndaysend-to-endaccordingtotheECpostaldirective.Thisqualityofserviceindicatordoesnotmeasurethepostaloperator'soverallperformanceinawaythatprovidesdirectcomparisonofpostalserviceoperators,anddoesnotincludeotherserviceperformanceindicatorsthanthoserelatedtotransittime.InparticularthisEuropeanStandarddoesnotmeasurewhetherthetimingofthelastcollectionofthedaymeetscustomer'srequirements.Itspecifiesasetofrequirementsforthedesignofaqualityofservicemeasuringsystemforsinglepieceprioritymail,involvingtheselectionanddistributionoftestitemsentandreceivedbyselectedpanellists.Thesampledesigngivesthespecificationsfortheitemtoberepresentativeoftherealmailflows.ThisEuropeanStandardrelatestothemeasurementoftheso-called"normal"servicesgiventoprivatepersons/householdsandbusinessesthatpostmailatstreetletterboxes,overthecounteratpostoffices,havepickupsattheirofficesorgivetheirmaildirectlyatpostalserviceoperatorssortingcentres.FortechnicalreasonsthisEuropeanStandardmaynotinallpartsbesuitableforthemeasuringofverysmallvolumesofmailandforoperatorswithlimitedcoverage.ThisEuropeanStandardisnotapplicableformeasuringtheend-to-endtransittimedistributionoflargebulkmailers'servicesandhybridmail,whichrequiredifferentmeasurementsystemsandmethodologies,iThisEuropeanStandardincludesspecificationsforthequalitycontrolandauditingofthemeasurementsystem.
【中国标准分类号】:M80
【国际标准分类号】:03_240
【页数】:62P;A4
【正文语种】:英语