GB 5810-1986 钳工锉
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来源:标准资料网
基本信息
标准名称: | 钳工锉 |
中标分类: |
机械 >>
工艺装备 >>
手工工具 |
替代情况: | 调整为QB/T 3845-1999 |
发布日期: | 1900-01-01 |
实施日期: | 1986-10-01 |
首发日期: | 1900-01-01 |
作废日期: | 1900-01-01 |
出版日期: | 1900-01-01 |
页数: | 6页 |
适用范围
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前言
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目录
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引用标准
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所属分类: 机械 工艺装备 手工工具
【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