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【英文标准名称】:Roadtrafficnoisereducingdevices-Testmethodfordeterminingtheacousticperformance-Intrinsiccharacteristics-Insituvaluesofsoundreflectionandairbornesoundinsulation
【原文标准名称】:道路交通降噪设备.声学性能测定的试验方法.固有的特征.声音反射和空气载声隔绝的原地测定值
【标准号】:BSCEN/TS1793-5-2003
【标准状态】:现行
【国别】:英国
【发布日期】:2003-04-25
【实施或试行日期】:2003-04-25
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:Thepresentdocumentdescribesatestmethodformeasuringtwoquantitiesrepresentativeoftheintrinsiccharacteristicsoftrafficnoisereducingdevices:thereflectionindexforsoundreflectionandthesoundinsulationindexforairbornesoundinsulation.Thetestmethodisintendedforthefollowingapplications:—determinationoftheintrinsiccharacteristicsofsoundreflectionandairbornesoundinsulationofnoisereducingdevicestobeinstalledalongroads,tobemeasuredeitherinsituorinlaboratoryconditions;—determinationoftheinsituintrinsiccharacteristicsofsoundreflectionandairbornesoundinsulationofnoisereducingdevicesinactualuse;—comparisonofdesignspecificationswithactualperformancedataafterthecompletionoftheconstructionwork;—verificationofthelongtermperformanceofnoisereducingdevices(witharepeatedapplicationofthemethod).Thetestmethodcanbeappliedbothinsituandonbarrierspurposelybuilttobetestedusingthemethoddescribedhere.Inthesecondcasethesampleshallbebuiltasfollows(seeFigure1):—apart,composedofacousticelements,thatextends4mandis4mhigh;—apost4mhigh(ifapplicableforthespecificnoisereducingdeviceundertest);—apart,composedofacousticelements,thatextendsatleast2mandis4mhigh;NOTEForqualifyingthereflectionindexonly,itisonlynecessarytohaveacousticelementsthatextend4mormore.NOTEForqualifyingthesoundinsulationindexofpostsonly,itisonlynecessarytohaveacousticelementsthatextend2mormoreoneithersideofthepost(seeFigure1).Resultsareexpressedasafunctionoffrequency,inone-thirdoctavebandsbetween100Hzand5kHz.Ifitisnotpossibletogetvalidmeasurementsresultsoverthewholefrequencyrangeindicated,theresultsshallbegivenintherestrictedfrequencyrangeandthereasonsoftherestriction(s)shallbeclearlyreported.
【中国标准分类号】:P66
【国际标准分类号】:17_140_30;93_080_30
【页数】:46P;A4
【正文语种】:英语


【英文标准名称】:Testingoftextiles;determinationoflineardensityofsingleandpliedyarns;elasto-yarnsincludingcorespunyarnsfromelastofibres;shortlengthmethod
【原文标准名称】:纺织品的检验.单根纱线和合股线的线密度的测定.弹性纱线.包括由弹性纤维纺成的包芯纱线.用分段法
【标准号】:DIN53830-4-1981
【标准状态】:现行
【国别】:德国
【发布日期】:1981-05
【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】:试验;纺织材料;尺寸;绳;定义;细度;纱;弹性纤维
【英文主题词】:testing;elastofibres;textiles;yarn;fineness;dimensions;twine;definitions
【摘要】:Testingoftextiles;determinationoflineardensityofsingleandpliedyarns;elasto-yarnsincludingcorespunyarnsfromelastofibres;shortlengthmethodEssaisdestextiles;déterminationdutitredesfilsetretors;filsélastiques,ycomprisfilsg
【中国标准分类号】:W10
【国际标准分类号】:59_080_20
【页数】:5P;A4
【正文语种】:德语