【英文标准名称】:Acoustics-In-situdeterminationofinsertionlossofoutdoornoisebarriersofalltypes
【原文标准名称】:声学各种类型户外声屏障插入损失的现场测定
【标准号】:ISO10847-1997
【标准状态】:现行
【国别】:国际
【发布日期】:1997-08
【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;定义;介入损耗;性能试验;现场试验;声学;噪声降低;空气噪声;防护屏蔽;就地
【英文主题词】:Acoustics;Airbornenoise;Definitions;Determination;Fieldtesting;Insitu;Insertionloss;Noisereduction;Performancetests;Shields
【摘要】:ThisInternationalStandardspecifiesmethodsforthedeterminationofinsertionlossofoutdoornoisebarriersintendedtoshieldvariouskindsofnoisesources.Itspecifiesdetailedproceduresforin-situmeasurementofbarrierinsertionlossincludingmicrophonepositions,sourceconditionsandacousticenvironmentsofthemeasurementsites.ThisInternationalStandardallowsonetomeasuretheinsertionlossofagivennoisebarrierinagivensiteandincludinggivenmeteorologicalconditions.Itdoesnotmakeitpossibletocompareinsertionlossvaluesofanequivalentbarrieronadifferentsite.Itcanbeusedforcomparinginsertionlossvaluesofdifferenttypesofbarriersonasamesiteandundergivenmeteorologicalconditionsbythedirectmethod.ThisInternationalStandardgivesamethodfordetermininginsertionloss:a)fromtheleveldifferencebeforeandaftertheinstallationofnoisebarriersandwhenthisisnotpossiblebecauseabarrierhasalreadybeeninstalled,b)usinganindirectmethodtoestimatethesoundpressurelevelsbeforeinstallationofthebarrierbymeasurementatanothersitewhichhasbeenjudgedtobeequivalent.Forequivalentsites,closematchisrequiredinsourcecharacteristics,microphonelocationsterrainprofilesgroundsurfacecharacteristics,surroundingartificialstructuresandmeteorologicalconditions.ThisInternationalStandardprescribesprinciplesforensuringthatsufficientlyequivalentconditionsaremaintainedbetween"before"and"after"casestopermitcertain,reliableandrepeatabledeterminationofbarrierinsertionloss.ThisInternationalStandarddoesnotcoverthedeterminationoftheintrinsicacousticquantitiesofthebarrier,forexamplethesoundreductionindexandthesoundabsorptioncoefficient.TheequivalentcontinuousA-weightedsoundpressurelevel,theA-weightedsoundexposurelevel,theoctaveorone-third-octavebandsoundpressureleveland/ormaximumsoundpressurelevelareusedasnoisedescriptors.ThisInternationalStandardcanbeusedforroutinedeterminationofbarrierperformanceorforengineeringordiagnosticevaluation.Itcanbeusedinsituationswherethebarrieristobeinstalledorhasalreadybeeninstalled.
【中国标准分类号】:Z32
【国际标准分类号】:17_140_01
【页数】:18P.;A4
【正文语种】:英语