ASTM E596-1996(2009) 隔音室减少噪音的实验室测量的标准试验方法
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【英文标准名称】:StandardTestMethodforLaboratoryMeasurementofNoiseReductionofSound-IsolatingEnclosures
【原文标准名称】:隔音室减少噪音的实验室测量的标准试验方法
【标准号】:ASTME596-1996(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:1996
【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】:enclosures;noiseisolation;noiseisolationclass;noisereduction;sound-isolating;Acousticaltests;Laboratorysoundtransmissiontesting;Partitions;Reverberationroommethod;Soundabsorbing/insulatingmaterials/applications;Soundtransmission
【摘要】:Thenoisereductionofanenclosureisapropertyoftheenclosure,thelocationofthesoundsourceusedtomeasurenoisereduction,andthespaceinwhichtheenclosureisplaced.Itisnotapropertyoftheenclosurealone,anditsmeasurementunderdifferentconditionscanbeexpectedtogivedifferentresults.Whenthenoisereductionismeasuredinaccordancewiththistestmethod,thesoundsourceisoutsidetheenclosureandthesoundfieldoutsidetheenclosureapproximatesadiffusesoundfield.Measurementsmadeinaccordancewiththistestmethodcanbeexpectedtobereproduciblefromonelaboratorytoanother.Thenoisereductionmeasuredinaccordancewiththistestmethodmaybeusedforthefollowingpurposes:Toranktheorderofsound-isolatingenclosuresaccordingtonoiseisolationclass,NIC.Toestimatethehighestone-thirdoctavebandsoundpressurelevelsthatcanoccuroutsidetheenclosurewithoutexceedingspecifiedsoundpressurelevelsinsidetheenclosure.Toestimatetheone-thirdoctavebandsoundpressurelevelsthatwilloccurinsidetheenclosurewithspecifiedsoundpressurelevelsoutside.Thenoisereductionmeasuredinaccordancewiththistestmethodmaynotestimateaccuratelytheisolationthattheenclosurewillprovidewhenitisusedtoisolateanoisesourceinsideitfromthespaceoutside.Theusershouldbecautiouswhenusingnoisereductionsmeasuredbythistestmethodtoevaluateenclosuresusedtoenclosenoisesources.Sound-isolatingenclosuresarefrequentlymadefromprefabricatedmodularpanels.Thenoisereductionmeasuredbythistestmethodappliestothecompleteenclosureandnottoindividualpanelsfromwhichitismadeandcannotbeusedtoinferthesoundtransmissionlossoftheindividualpanels.Specificationsforsound-isolatingenclosuresmayincludereferencetonoisereductionandnoiseisolationclassmeasuredinaccordancewiththistestmethod.1.1Thistestmethodcoversthereverberationroommeasurementofthenoisereductionofsound-isolatingenclosures.1.2Thenoiseisolationclassmaybedeterminedfromthenoisereductionmeasuredinaccordancewiththistestmethod.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:P31
【国际标准分类号】:71_040_20
【页数】:5P.;A4
【正文语种】:英语
【英文标准名称】:Industrialcommunicationnetworks-Fieldbusspecifications-Part3-19:Datalinklayerservicedefinition-Type19elements
【原文标准名称】:工业通信网络.现场总线规范.第3-19部分:数据链路层设备定义.19型元件
【标准号】:IEC61158-3-19-2010
【标准状态】:现行
【国别】:国际
【发布日期】:2010-08
【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/SC65C
【标准类型】:()
【标准水平】:()
【中文主题词】:总线系统;总线(数据处理);电路网络;通信;控制设备;控制系统;控制工艺学;数据通信;数据链层;数据连接系统;数据处理;数据设备;数据传送;定义;数字数据;数字工程;电子数据处理;电气工程;电子仪器;电子系统;现场总线;制导系统;工业设施;信息交换;信息处理;信息技术;接口(数据处理);链路层;开放系统互连;OSI;过程控制;过程控制工程;过程控制系统;信号;规范;传输媒质
【英文主题词】:Bussystems;Buses(dataprocessing);Circuitnetworks;Communication;Controlequipment;Controlsystems;Controltechnology;Datacommunication;Datalinklayers;Datalinksystem;Dataprocessing;Dataservices;Datatransfer;Definitions;Digitaldata;Digitalengineering;EDP;Electricalengineering;Electronicinstruments;Electronicsystems;Fieldbus;Guidancesystems;Industrialfacilities;Informationinterchange;Informationprocessing;Informationtechnology;Interfaces(dataprocessing);Linklayers;Opensystemsinterconnection;OSI;Processcontrol;Processcontrolengineering;Processcontrolsystems;Signals;Specification;Transmissionmedia
【摘要】:Thisstandardprovidescommonelementsforbasictime-criticalmessagingcommunicationsbetweendevicesinanautomationenvironment.Theterm“time-critical”isusedtorepresentthepresenceofatime-window,withinwhichoneormorespecifiedactionsarerequiredtobecompletedwithsomedefinedlevelofcertainty.Failuretocompletespecifiedactionswithinthetimewindowrisksfailureoftheapplicationsrequestingtheactions,withattendantrisktoequipment,plantandpossiblyhumanlife.ThisstandarddefinesinanabstractwaytheexternallyvisibleserviceprovidedbytheType19fieldbusdata-linklayerintermsofa)theprimitiveactionsandeventsoftheservice;b)theparametersassociatedwitheachprimitiveactionandevent,andtheformwhichtheytake;andc)theinterrelationshipbetweentheseactionsandevents,andtheirvalidsequences.Thepurposeofthisstandardistodefinetheservicesprovidedto?theType19fieldbusapplicationlayerattheboundarybetweentheapplicationanddatalinklayersofthefieldbusreferencemodel,and?systemsmanagementattheboundarybetweenthedata-linklayerandsystemsmanagementofthefieldbusreferencemodel.
【中国标准分类号】:M11
【国际标准分类号】:25_04_40;35_100_20;35_110
【页数】:30P.;A4
【正文语种】:英语
【英文标准名称】:Slottedpanheadscrews-ProductgradeA.
【原文标准名称】:开槽盘头螺钉.A级产品.
【标准号】:NFE25-128-2011
【标准状态】:现行
【国别】:法国
【发布日期】:2011-11-01
【实施或试行日期】:2011-11-26
【发布单位】:法国标准化协会(FR-AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Designations;Dimensions;External-threadfasteners;Fasteners;Materials;Metric;Panheadscrews;Pan-headfasteners;Productgrades;Screws(bolts);Slottedscrews;Slotted-headfasteners;Specification(approval);Threads
【摘要】:
【中国标准分类号】:J13
【国际标准分类号】:21_060_10
【页数】:12P;A4
【正文语种】:其他