BS 5677-1979 采用互易技术对1英寸标准电容式传声器进行压力校准的精确方法
时间:2024-05-23 15:09:31 来源: 标准资料网 作者：标准资料网 阅读：9883
【英文标准名称】:Method(precision)forpressurecalibrationofone-inchstandardcondensermicrophonesbythereciprocitytechnique
【原文标准名称】:采用互易技术对1英寸标准电容式传声器进行压力校准的精确方法
【标准号】:BS5677-1979
【标准状态】:现行
【国别】:英国
【发布日期】:1978-12-29
【实施或试行日期】:1978-12-29
【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】:声学;校准;电气工程;传声器
【英文主题词】:Acoustics;Calibration;Electricalengineering;Microphones
【摘要】:Appliestolaboratorystandardcondensermicrophoneswiththehighestobtainableaccuracyforinterchangeofinformationbetweentestingauthorities.
【中国标准分类号】:M72
【国际标准分类号】:33_160_50
【页数】:20P.;A4
【正文语种】:英语
【英文标准名称】:Plastics-Polyoxymethylene(POM)mouldingandextrusionmaterials-Part1:Designationsystemandbasisforspecifications
【原文标准名称】:塑料.聚甲醛模塑和挤塑材料.第1部分:命名体系和基本规范
【标准号】:ISO9988-1-2004
【标准状态】:现行
【国别】:国际
【发布日期】:2004-09
【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/TC61
【标准类型】:()
【标准水平】:()
【中文主题词】:塑料;模制材料;共聚物;聚甲醛;模塑材料;热塑性聚合物;均聚物;挤压;名称与符号;数据块;甲醛
【英文主题词】:Classification;Copolymers;Datablocks;Designations;Extruding;Formaldehyde;Homopolymers;Marking;Mouldingmaterials;Mouldings(shapedsection);Plastics;Polyoxymethylene;POM;Specification;Thermoplasticpolymers
【摘要】:1ThispartofISO9988establishesasystemofdesignationforpolyoxymethylene(POM)thermoplasticmaterials,whichmaybeusedasthebasisforspecifications.Polyoxymethylenematerialsarethermoplasticmaterialscomposedprincipallyoflong-chainsynthetichomopolymersandcopolymersofformaldehyde.Therepeatingunitinthemolecularchainis-CH2O-asanintegralpartofthemainpolymerchainresultingfrompolymerizationofformaldehyde.2Thetypesofpolyoxymethyleneplasticaredifferentiatedfromeachotherbyaclassificationsystembasedonappropriatelevelsofthefollowingdesignatoryproperties:a)meltmass-flowrateormeltvolume-flowrate,b)tensilemodulus,andoninformationaboutbasicpolymerparameters,intendedapplication,methodofprocessing,importantproperties,additives,colorants,fillersandreinforcingmaterials.3ThispartofISO9988isapplicabletoallpolyoxymethylenehomopolymersandtocopolymersofpolyoxymethyleneandblendsofpolymerscontainingpolyoxymethylene.Itappliestomaterialsreadyfornormaluseintheformofpowder,granulesorpelletsandtomaterialsunmodifiedandmodifiedbycolorants,additives,fillers,etc.4Itisnotintendedtoimplythatmaterialshavingthesamedesignationnecessarilygivethesameperformance.ThispartofISO9988doesnotprovideengineeringdata,performancedataordataonprocessingconditionswhichmayberequiredtospecifymaterialsforparticularend-useapplications.Ifsuchadditionalpropertiesarerequired,theyshallbedeterminedinaccordancewiththetestmethodsspecifiedinpart2ofthisInternationalStandard.5Inordertospecifyathermoplasticmaterialforaparticularapplicationortoensurereproducibleprocessing,additionalrequirementsmaybegivenindatablock5(see3.1).
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:6P;A4
【正文语种】:英语
【英文标准名称】:Electroacoustics-Simulatorsofhumanheadandear-Part2:Aninterimacousticcouplerforthecalibrationofaudiometricearphonesintheextendedhigh-frequencyrange
【原文标准名称】:电声学人的头和耳模拟器第2部分:在扩展的高频范围内测听力耳机校正用间歇听力耦合器
【标准号】:IEC60318-2-1998
【标准状态】:作废
【国别】:国际
【发布日期】:1998-08
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/TC29
【标准类型】:()
【标准水平】:()
【中文主题词】:声学;电气工程;校正;头戴送受话器;声耦合器;模拟器;听力测定;耳机
【英文主题词】:Acousticcouplers;Acoustics;Adapters;Audiometry;Calibration;Couplers;Dimensions;Earphones;Ears;Electricalengineering;Environment;Environmentalcondition;Head(anatomy);Headphones;Microphones;Simulators
【摘要】:ThispartofIEC60318specifiestwodifferentadaptersandtheremovableconicalringtobeusedwiththeIEC60318-1earsimulatortoprovideaninterimacousticcouplerforthecalibrationofcertainaudiometricearphonesdesignedforuseintheextendedhigh-frequencyrangefrom8kHzupto16kHz.EnvironmentalconditionsforthecalibrationanduseofthecoupleraregiveninIEC60318-1.
【中国标准分类号】:L31
【国际标准分类号】:17_140_50
【页数】:19P.;A4
【正文语种】:英语