BS EN 62458-2011 音响系统设备.声电变换器.大信号参数的测定

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【英文标准名称】:Soundsystemequipment.Electroacoustictransducers.Measurementoflargesignalparameters
【原文标准名称】:音响系统设备.声电变换器.大信号参数的测定
【标准号】:BSEN62458-2011
【标准状态】:现行
【国别】:英国
【发布日期】:2011-06-30
【实施或试行日期】:2011-06-30
【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】:Acoustics;Acoustoelectricdevices;Amplifiers;Audioamplifiers;Definitions;Distortionfactors;Electricpower(wattage);Electricalengineering;Electricalmeasurement;Electroacoustics;Electronicinstruments;Entertainmentelectronics;Headphones;Inputpower;Inputvoltage;Interferingnoise;Loudspeakers;Measurement;Measuringaccuracy;Measuringinstruments;Measuringtechniques;Non-linearity;Performance;Physicalproperties;Poweroutput;Properties;Qualityassurance;Ratings;Signalconverters;Signaldistortion;Signals;Soundtransducer;Specification(approval);Testsignals;Testing;Transformers;Voltage
【摘要】:ThisInternationalStandardappliestotransducerssuchasloudspeakerdriveunits,loudspeakersystems,headphones,micro-speakers,shakersandotheractuatorsusingeitheranelectro-dynamicalorelectro-magneticmotorcoupledwithamechanicalsuspension.Thelargesignalbehaviourofthetransducerismodelledbyalumpedparametermodelconsideringdominantnonlinearitiessuchasforcefactor,stiffnessandinductanceasshowninFigure1.Thestandarddefinesthebasictermsandparametersofthemodel,themethodsofmeasurementsandthewaytheresultsshouldbereported.
【中国标准分类号】:M72
【国际标准分类号】:33_160_50
【页数】:28P.;A4
【正文语种】:英语


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【英文标准名称】:
【原文标准名称】:热水器用安全阀
【标准号】:JISB8414-1990
【标准状态】:作废
【国别】:日本
【发布日期】:1990-08-01
【实施或试行日期】:1990-08-01
【发布单位】:日本工业标准调查会(JISC)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:减压阀;水加热器;供热水系统
【英文主题词】:
【摘要】:
【中国标准分类号】:J16
【国际标准分类号】:
【页数】:
【正文语种】:


【英文标准名称】:StandardPracticeforDeterminationofOdorandTasteThresholdsByaForced-ChoiceAscendingConcentrationSeriesMethodofLimits
【原文标准名称】:用强制选择提升浓度限值系列法测定气味和味道阈限的标准实施规程
【标准号】:ASTME679-2004
【标准状态】:现行
【国别】:
【发布日期】:2004
【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】:E18.04
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:最终制品;工艺;浓度;嗅觉分析;品尝检验;最大值;试验
【英文主题词】:airpollution;ascendingmethodoflimits;odor;panel;sensoryevaluation;taste;threshold;waterpollution
【摘要】:Sensorythresholdsareusedtodeterminethepotentialofsubstancesatlowconcentrationstoimpartodor,taste,skinfeel,etc.tosomeformofmatter.Thresholdsareused,forexample,insettinglimitsforairpollution,innoiseabatement,inwatertreatment,andinfoodsystems.Thresholdsareusedtocharacterizeandcomparethesensitivityofindividualorgroupstogivenstimuli,forexample,inmedicine,inethnicstudies,andinthestudyofanimalspecies.1.1Thispracticedescribesarapidtestfordeterminingsensorythresholdsofanysubstanceinanymedium.1.2Itprescribesanoveralldesignofsamplepreparationandaprocedureforcalculatingtheresults.1.3Thethresholdmaybecharacterizedasbeingeither(a)onlydetection(awareness)thataverysmallamountofaddedsubstanceispresentbutnotnecessarilyrecognizable,or(b)recognitionofthenatureoftheaddedsubstance.1.4Themediummaybeagas,suchasair,aliquid,suchaswaterorsomebeverage,orasolidformofmatter.Themediummaybeodorlessortasteless,ormayexhibitacharacteristicodorortasteperse.1.5Thispracticedescribestheuseofamultipleforced-choicesamplepresentationmethodinanascendingconcentrationseries,similartothemethodoflimits.1.6Physicalmethodsofsamplepresentationforthresholddeterminationarenotapartofthispractice,andwilldependonthephysicalstate,size,shape,availability,andotherpropertiesofthesamples.1.7Itisrecognizedthatthedegreeoftrainingreceivedbyapanelwithaparticularsubstancemayhaveaprofoundinfluenceonthethresholdobtainedwiththatsubstance(1).1.8Thresholdsdeterminedbyusingonephysicalmethodofpresentationarenotnecessarilyequivalenttovaluesobtainedbyanothermethod.
【中国标准分类号】:X04
【国际标准分类号】:67_240
【页数】:7P.;A4
【正文语种】: