【英文标准名称】:Acoustics.Noiseemittedbymachineryandequipment.Determinationofemissionsoundpressurelevelsataworkstationandatotherspecifiedpositionsapplyingaccurateenvironmentalcorrections
【原文标准名称】:声学.机械装置及设备发出的噪声.用精确环境修正测定工作地点和其它试验场所声压级
【标准号】:BSENISO11204-2010
【标准状态】:现行
【国别】:英国
【发布日期】:2010-08-31
【实施或试行日期】:2010-08-31
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:声学测量;声学试验;声学;空气噪声;解剖结构;控制;修正;定义(术语);排放;排放测量;环境;人类工效学;误差修正;外部噪声;固定件;频率;头;安装;仪器;机械噪声;机械;测量;测量条件;测量持续时间;测量环境;测量不确定度;测量仪器;测量技术;方法;传声器;噪声;噪声排放;噪声(环境的);噪声测量;操作台;操作;操作者;人员;位置;辐射;座椅;就坐;声强;噪声值;声压;声压级;声音传播;状态;工作地点
【英文主题词】:Acousticmeasurement;Acoustictesting;Acoustics;Airbornenoise;Anatomicalconfigurations;Control;Corrrections;Definitions;Emission;Emissionmeasurement;Environment;Ergonomics;Errorcorrection;Externalnoise;Fixings;Frequencies;Head(anatomy);Installations;Instruments;Machinenoise;Machines;Measurement;Measurementconditions;Measurementduration;Measuringenvironment;Measuringincertainity;Measuringinstruments;Measuringtechniques;Methods;Microphones;Noise;Noiseemissions;Noise(environmental);Noisemeasurements;Operatingstations;Operation;Operators;Persons;Position;Radiation;Seats;Sitting;Soundintensity;Soundlevels;Soundpressure;Soundpressurelevel;Soundpropagation;Status;Workingplaces
【摘要】:ThisInternationalStandardspecifiesamethodfordeterminingtheemissionsoundpressurelevelsofmachineryorequipment,ataworkstationandatotherspecifiedpositionsnearby,inanyenvironmentwhichmeetscertainqualificationrequirements.Aworkstationisoccupiedbyanoperatorandmaybelocatedinopenspace,intheroomwherethesourceundertestoperates,inacabfixedtothesourceundertest,orinanenclosureremotefromthesourceundertest.Oneormorespecifiedpositionsmaybelocatedinthevicinityofaworkstation,orinthevicinityofanattendedorunattendedmachine.Suchpositionsaresometimesreferredtoasbystanderpositions.EmissionsoundpressurelevelsaredeterminedasA-weightedlevels.Additionally,levelsinfrequencybandsandC-weightedpeakemissionsoundpressurelevelscanbedeterminedinaccordancewiththisInternationalStandard,ifrequired.NOTE1ThecontentsoftheseriesISO11200toISO11205aresummarizedinISO11200.Amethodisgivenfordeterminingalocalenvironmentalcorrection(subjecttoaspecifiedlimitingmaximumvalue)tobeappliedtothemeasuredsoundpressurelevelstoexcludetheeffectsofreflectionsfromreflectingsurfacesotherthantheplaneonwhichthesourceundertestisplaced.Thiscorrectionisbaseduponthemeansoundpressurelevelonameasurementsurface,thesoundpressurelevelmeasuredataspecifiedposition,andeitheranenvironmentalcorrectionortheequivalentabsorptionareaofthetestroom.WiththemethodspecifiedinthisInternationalStandard,resultsofaccuracygrade2(engineeringgrade)oraccuracygrade3(surveygrade)areobtained.Correctionsareappliedforbackgroundnoiseand,asdescribedabove,fortheacousticenvironment.Instructionsaregivenforthemountingandoperationofthesourceundertestandforthechoiceofmicrophonepositionsfortheworkstationandforotherspecifiedpositions.Onepurposeofthemeasurementsistopermitcomparisonoftheperformanceofdifferentunitsofagivenfamilyofmachines,underdefinedenvironmentalconditionsandstandardizedmountingandoperatingconditions.NOTE2ThedataobtainedcanalsobeusedforthedeclarationandverificationofemissionsoundpressurelevelsasspecifiedinISO4871.
【中国标准分类号】:Z32
【国际标准分类号】:17_140_20
【页数】:48P.;A4
【正文语种】:英语


【英文标准名称】:ElectronicandDegreasingGradesof1,1,2-Trichloro1,2,2-TrifluoroethaneSolvent
【原文标准名称】:1,1,2-三氯1,2,2-三氟乙烷溶剂的脱脂等级和电子等级
【标准号】:ASTMD4995-1989
【标准状态】:作废
【国别】:美国
【发布日期】:1989
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:溶剂;三氯三氟乙烷;化学
【英文主题词】:chemistry;trichlorotrifluoroethane;solvents
【摘要】:
【中国标准分类号】:G63
【国际标准分类号】:71_080_20
【页数】:2P;A4
【正文语种】:英语