CB 959-1980 埋入式人孔盖
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基本信息
标准名称: | 埋入式人孔盖 |
中标分类: | 船舶 >> 舾装设备 >> 舱面属具 |
ICS分类: | 造船和海上建筑物 >> 船舶和海上建筑物综合 >> 甲板设备和装置 |
替代情况: | CB/T 19-2001已含盖此标准 |
发布日期: | 1900-01-01 |
实施日期: | 1981-10-01 |
首发日期: | 1900-01-01 |
作废日期: | 2010-01-20 |
出版日期: | 1900-01-01 |
页数: | 2页 |
适用范围
没有内容
前言
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目录
没有内容
引用标准
没有内容
所属分类: 船舶 舾装设备 舱面属具 造船和海上建筑物 船舶和海上建筑物综合 甲板设备和装置
下载地址: 点击此处下载
【英文标准名称】:StandardTestMethodforMeasurementofAirborneSoundAttenuationbetweenRoomsinBuildings
【原文标准名称】:建筑物内部空间中空气声隔声测量的标准试验方法
【标准号】:ASTME336-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E33.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:airbornesoundtransmissionloss;apparentsoundtransmissionclass;apparenttransmissionloss;fieldsoundtransmissionclass;fieldtransmissionloss;flankingtransmission;noiseisolationclass;noisereduction;normalizednoiseisolationclass;
【摘要】:Themainpartofthisstandardusesproceduresoriginallydevelopedforlaboratorymeasurementsofthetransmissionlossofpartitions.Theseproceduresassumethattheroomsinwhichthemeasurementsaremadehaveasoundfieldthatreasonablyapproximatesadiffusefield.Soundpressurelevelsinsuchroomsarereasonablyuniformthroughouttheroomandaveragelevelsvaryinverselywiththelogarithmoftheroomsoundabsorption.Notallroomswillsatisfytheseconditions.Practicalexperienceandcontrolledstudies(1)haveshownthatthetestmethodisapplicabletosmallerspacesnormallyusedforworkorliving,suchasroomsinmulti-familydwellings,hotelguestrooms,meetingrooms,andofficeswithvolumeslessthan150cubicmeters.ThemeasuresappropriateforsuchspacesareNR,NNR,andATL.ThecorrespondingsinglenumberratingsareNIC,NNICandASTC.TheATLandASTCmaybemeasuredbetweenlargerspacesthatmeetalimitationonabsorptioninthespacestoprovideuniformsounddistribution.AnnexA2wasdevelopedforuseinspacesthatareverylarge(volumeof150m3orgreater).Soundpressurelevelsduringtestingcanvarymarkedlyacrosslargeroomssothatthedegreeofisolationcanvarystronglywithdistancefromthecommon(separating)partition.Thisprocedureevaluatestheisolationobservednearthepartition.TheappropriatemeasureisNR,andtheappropriatesinglenumberratingisNIC.Itissometimesnecessarytodemonstratethatthesoundinsulationofapartitionmeetsorexceedsaspecificcriterion.AnnexA1providesadditionalrequirements,anddescribeshowshieldingprocedurescanbeusedtoreduceflankingtransmissioninstagestoshowthatapartitionhasachievedaminimumvalueoftheFTLorminimumvalueoftheFSTCwhichmaymeetorexceedthecriterion.Ifitisdemonstratedthatnosignificantflankingexiststhroughshieldingofallpotentialflankingpaths,then,andonlythen,FTLandFSTCmaybereportedwithoutqualification.Note38212;Measuringthesoundtransmissionlosspropertiesofapartitionitselftodemonstratethatitmeetsorexceedsaspecificcriterionisverydifficultinthefieldduetothepresenceofflanking(2,3).Roomvolumeandabsorptionrequirementsmustalsobemet.Severalmetricsareavailableforspecificuses:NoiseReduction(NR)andNoiseIsolationClass(NIC)8212;Describethesoundisolationbetweentwospacesintheconditionfound.Themeasurementmethodvariesdependingonthesizeofthespaces.Wheneachspaceislessthan150cubicmeters,soundlevelsareaveragedoverthespace.NRvaluesforsuchspaceswhenunfurnishedwillusuallybelowerthanvaluesmeasuredwhenthespacesarefurnished.Thesevaluesrelatedirectlytothesoundattenuationexperiencedbyoccupantsofthespacesfortheconditionevaluated,includingtheeffectsofflankingandroomabsorption,andnotjusttotheperformanceofapartition.Thereforeresultsmaybedifferentwhenmeasuredindifferentdirections.Wheneitherofthespacesis150cubicmetersormore,soundlevelsaremeasuredinanareaclosetothepartitiononeachside.Theseresultsincludesomeeffectofroomabsorptionandflanking,buttheeffectofroomabsorptionislesswhenmeasuredclosetothepartition.NormalizedNoiseReduction(NNR)andNormalizedNoiseIsolationClass(NNIC)8212;Givethesoundisolationbetweentworesidentialorofficespacesadjustedtostandardizedroomconditions.Thisnormalizationisusuallydonetocompensateforalackorexcessoffurnishingsintherooms.NNRandNNICshallnotbeusedforspacesof150cubicmetersorlarger.Thesevaluesareintendedtore.........
【中国标准分类号】:P31
【国际标准分类号】:91_120_20
【页数】:12P.;A4
【正文语种】:英语
【原文标准名称】:建筑物内部空间中空气声隔声测量的标准试验方法
【标准号】:ASTME336-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E33.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:airbornesoundtransmissionloss;apparentsoundtransmissionclass;apparenttransmissionloss;fieldsoundtransmissionclass;fieldtransmissionloss;flankingtransmission;noiseisolationclass;noisereduction;normalizednoiseisolationclass;
【摘要】:Themainpartofthisstandardusesproceduresoriginallydevelopedforlaboratorymeasurementsofthetransmissionlossofpartitions.Theseproceduresassumethattheroomsinwhichthemeasurementsaremadehaveasoundfieldthatreasonablyapproximatesadiffusefield.Soundpressurelevelsinsuchroomsarereasonablyuniformthroughouttheroomandaveragelevelsvaryinverselywiththelogarithmoftheroomsoundabsorption.Notallroomswillsatisfytheseconditions.Practicalexperienceandcontrolledstudies(1)haveshownthatthetestmethodisapplicabletosmallerspacesnormallyusedforworkorliving,suchasroomsinmulti-familydwellings,hotelguestrooms,meetingrooms,andofficeswithvolumeslessthan150cubicmeters.ThemeasuresappropriateforsuchspacesareNR,NNR,andATL.ThecorrespondingsinglenumberratingsareNIC,NNICandASTC.TheATLandASTCmaybemeasuredbetweenlargerspacesthatmeetalimitationonabsorptioninthespacestoprovideuniformsounddistribution.AnnexA2wasdevelopedforuseinspacesthatareverylarge(volumeof150m3orgreater).Soundpressurelevelsduringtestingcanvarymarkedlyacrosslargeroomssothatthedegreeofisolationcanvarystronglywithdistancefromthecommon(separating)partition.Thisprocedureevaluatestheisolationobservednearthepartition.TheappropriatemeasureisNR,andtheappropriatesinglenumberratingisNIC.Itissometimesnecessarytodemonstratethatthesoundinsulationofapartitionmeetsorexceedsaspecificcriterion.AnnexA1providesadditionalrequirements,anddescribeshowshieldingprocedurescanbeusedtoreduceflankingtransmissioninstagestoshowthatapartitionhasachievedaminimumvalueoftheFTLorminimumvalueoftheFSTCwhichmaymeetorexceedthecriterion.Ifitisdemonstratedthatnosignificantflankingexiststhroughshieldingofallpotentialflankingpaths,then,andonlythen,FTLandFSTCmaybereportedwithoutqualification.Note38212;Measuringthesoundtransmissionlosspropertiesofapartitionitselftodemonstratethatitmeetsorexceedsaspecificcriterionisverydifficultinthefieldduetothepresenceofflanking(2,3).Roomvolumeandabsorptionrequirementsmustalsobemet.Severalmetricsareavailableforspecificuses:NoiseReduction(NR)andNoiseIsolationClass(NIC)8212;Describethesoundisolationbetweentwospacesintheconditionfound.Themeasurementmethodvariesdependingonthesizeofthespaces.Wheneachspaceislessthan150cubicmeters,soundlevelsareaveragedoverthespace.NRvaluesforsuchspaceswhenunfurnishedwillusuallybelowerthanvaluesmeasuredwhenthespacesarefurnished.Thesevaluesrelatedirectlytothesoundattenuationexperiencedbyoccupantsofthespacesfortheconditionevaluated,includingtheeffectsofflankingandroomabsorption,andnotjusttotheperformanceofapartition.Thereforeresultsmaybedifferentwhenmeasuredindifferentdirections.Wheneitherofthespacesis150cubicmetersormore,soundlevelsaremeasuredinanareaclosetothepartitiononeachside.Theseresultsincludesomeeffectofroomabsorptionandflanking,buttheeffectofroomabsorptionislesswhenmeasuredclosetothepartition.NormalizedNoiseReduction(NNR)andNormalizedNoiseIsolationClass(NNIC)8212;Givethesoundisolationbetweentworesidentialorofficespacesadjustedtostandardizedroomconditions.Thisnormalizationisusuallydonetocompensateforalackorexcessoffurnishingsintherooms.NNRandNNICshallnotbeusedforspacesof150cubicmetersorlarger.Thesevaluesareintendedtore.........
【中国标准分类号】:P31
【国际标准分类号】:91_120_20
【页数】:12P.;A4
【正文语种】:英语
基本信息
标准名称: | 反射式电视测试图 重合测试图A型 |
英文名称: | Test charts of reflection for television?Registration test chart A |
中标分类: | 电子元器件与信息技术 >> 电真空器件 >> 电子束管 |
ICS分类: | 计量学和测量、物理现象 >> 光学和光学测量 >> 颜色和光的测量 |
替代情况: | SJ 2243.8-1982;被GB/T 13170-2011代替 |
发布部门: | 信息产业部(电子) |
发布日期: | 1991-09-04 |
实施日期: | 1992-05-01 |
首发日期: | 1991-09-04 |
作废日期: | 2012-07-01 |
主管部门: | 信息产业部(电子) |
归口单位: | 全国电真空器件标准化技术委员会 |
起草单位: | 机电部南京55所 |
出版日期: | 1900-01-01 |
页数: | 6页 |
适用范围
本标准规定了反射式电视重合测试图(A型)的适用范围、规格、尺寸和光反射系数。本标准测试图主要供黑白及彩色摄像系统调整多路重合、配准用。
前言
没有内容
目录
没有内容
引用标准
没有内容
所属分类: 电子元器件与信息技术 电真空器件 电子束管 计量学和测量 物理现象 光学和光学测量 颜色和光的测量