JIS B2401 ERRATUM 1-2006 勘误

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【英文标准名称】:Acoustics-Measurementofinsertionlossofductedsilencerswithoutflow-Laboratorysurveymethod
【原文标准名称】:声学.无气流管道消声器插入损失的测量.实验室测量法
【标准号】:BSENISO11691-2009
【标准状态】:现行
【国别】:英国
【发布日期】:2010-05-31
【实施或试行日期】:2010-05-31
【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】:
【英文主题词】:Acousticmeasurement;Acoustictesting;Acoustics;Airducts;Cables;Calibration;Canals;Checkingequipment;Classes;Definitions;Ducts;Enginesilencers;Flow;Insertionloss;Laboratorytesting;Laboratorytests;Loudspeakers;Measurement;Measurementcircuits;Measuringenvironment;Measuringequipment;Measuringtechniques;Microphones;Mineralwool;Noiseabatement;Precision;Reverberationrooms;Safetyofmachinery;Sonictesting;Sound;Soundmeters;Soundsources;Testresults;Testing;Testingdevices
【摘要】:ThisInternationalStandardspecifiesalaboratorysubstitutionmethodtodeterminetheinsertionlosswithoutflowofducted,mainlyabsorbent,circularandrectangularsilencers,aswellasotherductelementsforuseinventilatingandair-conditioningsystems.ThisInternationalStandardisapplicabletosilencerswherethedesignvelocitydoesnotexceed15m/s.Asthemethoddoesnotincludeselfgeneratedflownoise,thisInternationalStandardisnotsuitablefortestsonsilencerswherethistypeofnoiseisofgreatimportancefortheevaluationofthesilencerperformance.TheinsertionlossdeterminedaccordingtothisInternationalStandardinalaboratorywillnotnecessarilybethesameastheinsertionlossthatwillbeobtainedinaninstallationinthefield.Differentsoundandflowfieldsintheductwillyielddifferentresults.AsthisInternationalStandardrequiresregulartestducts,theresultsmayincludesomeflankingtransmissonviastructuralvibrationintheductwalls,thatsetsanupperlimittotheinsertionlossthatcanbedetermined.ThisInternationalStandardisintendedtobeusedforcircularsilencerswithdiametersof80mmto2000mmorrectangularsilencerswithcross-sectionalareaswithinthesamerange.
【中国标准分类号】:P31
【国际标准分类号】:17_140_20;91_120_20;91_140_30
【页数】:14P.;A4
【正文语种】:英语


【英文标准名称】:Low-voltageswitchgearandcontrolgearassemblies-Part4:particularrequirementsforassembliesforconstructionsites(ACS).
【原文标准名称】:低压开关设备和控制装置组件.第4部分:施工现场用组件的特殊要求
【标准号】:NFC63-424-1991
【标准状态】:作废
【国别】:法国
【发布日期】:1991-09-01
【实施或试行日期】:1991-09-20
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:规范(验收);低压开关设备;开关设备;定义;定义;法语;安全工程;电气工程;电气安全;安全;开关设备成套装置;低电压;英语;工作场所安全;工地电源箱;职业安全;配电;组合;建筑工地;安全要求;临时电力设备;作标记
【英文主题词】:
【摘要】:
【中国标准分类号】:K31
【国际标准分类号】:29_130_20
【页数】:26P;A4
【正文语种】:其他