ISO 389-2-1994 声学校正听力设备的基准零级第2部分:纯音和插入式耳机用的基准等效阈声压级

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【英文标准名称】:Acoustics-Referencezeroforthecalibrationofaudiometricequipment-Part2:Referenceequivalentthresholdsoundpressurelevelsforpuretonesandinsertearphones
【原文标准名称】:声学校正听力设备的基准零级第2部分:纯音和插入式耳机用的基准等效阈声压级
【标准号】:ISO389-2-1994
【标准状态】:现行
【国别】:国际
【发布日期】:1994-07
【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】:声学;校正;基准当量;插入式耳机;听力计;阈值;听觉阈;基准面;声压级
【英文主题词】:Acoustics;Audiometers;Audiometry;Auditorythreshold;Calibration;Datum;Definitions;Ears;Electricalengineering;Headphones;Hearing(auditoryperception);Insertearphones;Instruments;Measuringtechniques;Pressure;Pure-toneaudiometers;Referenceequivalent;Referencelevels;Simulators;Sound;Soundpressure;Soundpressurelevel;Thresholdvalue;Types
【摘要】:SpecifieslevelssupplementarytothosespecifiedinISO389:1991(tobere-issuedasISO389-1).ValuesgivenareapplicabletoinsertearphonesoftypeEtymoticResearchER-3A,coupledtothehumanearbyearinsertsoftypeER-3-14.
【中国标准分类号】:A59
【国际标准分类号】:13_140
【页数】:7P.;A4
【正文语种】:英语

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上一篇: ISO 389-4-1994 声学校正听力设备的基准零级第4部分:窄带掩蔽噪声基准级
下一篇: BS EN ISO 11127-3-1998 涂料和其它相关制品应用前钢基质的预处理.喷非金属清理磨料试验方法.表观密度的测定

Product Code:SAE AMS3703
Title:Adhesive, Electrically Non-Conductive, Moderately Rapid Cure (Cancelled Oct 1995)
Issuing Committee:Ams P Polymeric Materials Committee
Scope:【英文标准名称】:StandardTestMethodforDeterminingtheOrientationofaMetalCrystal
【原文标准名称】:测定金属晶体取向的标准试验方法
【标准号】:ASTME82-2009
【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】:E04.11
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:backreflectionLaueX-ray;hyperbolicchart;metalcrystal;orientation;polarchart;standardprojection;X-raydiffraction;Back-reflectionLauemethod;Crystallographiccharacteristics;Lauemethod;Metalcrystals;Nondestructiveevaluation(NDE)
【摘要】:Metalsandothermaterialsarenotalwaysisotropicintheirphysicalproperties.Forexample,Young''smoduluswillvaryindifferentcrystallographicdirections.Therefore,itisdesirableornecessarytodeterminetheorientationofasinglecrystalundergoingtestsinordertoascertaintherelationofanypropertytodifferentdirectionsinthematerial.Thistestmethodcanbeusedcommerciallyasaqualitycontroltestinproductionsituationswhereadesiredorientation,withinprescribedlimits,isrequired.Withtheuseofanadjustablefixedholderthatcanlaterbemountedonasaw,lathe,orothermachine,asinglecrystalmaterialcanbemovedtoapreferredorientation,andsubsequentlysectioned,ground,orprocessedotherwise.Ifgrainsofapolycrystallinematerialarelargeenough,thistestmethodcanbeusedtodeterminetheirorientationsanddifferencesinorientation.1.1Thistestmethodcoverstheback-reflectionLaueprocedurefordeterminingtheorientationofametalcrystal.Theback-reflectionLauemethodfordeterminingcrystalorientation(1,2)maybeappliedtomacrograins(3)(0.5-mmdiameterorlarger)withinpolycrystallineaggregates,aswellastosinglecrystalsofanysize.Themethodisdescribedwithreferencetocubiccrystals;itcanbeappliedequallywelltohexagonal,tetragonal,ororthorhombiccrystals.1.2Mostnaturalcrystalshavewelldevelopedexternalfaces,andtheorientationofsuchcrystalscanusuallybedeterminedfrominspection.Theorientationofacrystalhavingpoorlydevelopedfaces,ornofacesatall(forexample,ametalcrystalpreparedinthelaboratory)mustbedeterminedbymoreelaboratemethods.ThemostconvenientandaccurateoftheseinvolvestheuseofX-raydiffraction.Thex201C;orientationofametalcrystalx201D;isknownwhenthepositionsinspaceofthecrystallographicaxesoftheunitcellhavebeenlocatedwithreferencetothesurfacegeometryofthecrystalspecimen.Thisrelationbetweenunitcellpositionandsurfacegeometryismostconvenientlyexpressedbystereographicorgnomonicprojection.1.3Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H10
【国际标准分类号】:77_040_99
【页数】:13P.;A4
【正文语种】:英语