BS EN 60268-4-2010 声系统设备.第4部分:麦克风

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【英文标准名称】:Soundsystemequipment.Part4:Microphones
【原文标准名称】:声系统设备.第4部分:麦克风
【标准号】:BSEN60268-4-2010
【标准状态】:现行
【国别】:英国
【发布日期】:2010-08-31
【实施或试行日期】:2010-08-31
【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】:电声器件;波幅;分类;畸变系数;动力学;电声学;环境条件;频率曲线;频率响应;阻抗;影响量;作标记;测量;测量技术;传声器;自然噪声电压;噪声;非线性;使用条件;参数;特性;基准轴;基准曲线;声压;声压级;声传输;对称;试验;转换系数;传输装置;传输系统;电压测量
【英文主题词】:Acoustoelectricdevices;Amplitude;Classification;Distortionfactors;Dynamics;Electroacoustics;Environmentalcondition;Frequencycurve;Frequencyresponse;Impedance;Influencequantity;Marking;Measurement;Measuringtechniques;Microphones;Naturalnoisevoltage;Noise;Non-linearity;Operatingconditions;Parameters;Properties;Referenceaxes;Referencecurve;Soundpressure;Soundpressurelevel;Soundtransmission;Symmetry;Testing;Transfercoefficient;Transmissiondevices;Transmissionsystems;Voltagemeasuring
【摘要】:ThispartofIEC60268specifiesmethodsofmeasurementfortheelectricalimpedance,sensitivity,directionalresponsepattern,dynamicrangeandexternalinfluencesofsoundsystemmicrophones,andalsodetailsthecharacteristicstobespecifiedbythemanufacturer.Itappliestosoundsystemmicrophonesforallapplicationsforspeechandmusic.Itdoesnotapplytomeasurementmicrophones,butitdoesapplytoeachaudiochannelofmicrophoneshavingmorethanonechannel,forexampleforstereoorsimilaruse.Itisalsoapplicabletoflush-mountedmicrophonesandtotheanaloguecharacteristicsofmicrophoneswithdigitalaudiooutput.ForthepurposesofthisInternationalStandard,amicrophoneincludesallsuchdevicesastransformers,pre-amplifiers,orotherelementsthatformanintegralpartofthemicrophone,uptotheoutputterminalsspecifiedbythemanufacturer.NOTEThecharacteristicsspecifiedinthisstandarddonotcompletelydescribethesubjectiveresponseofthemicrophone.Furtherworkisnecessarytofindnewdefinitionsandmeasurementproceduresforalaterreplacementbyobjectivecharacteristicsofatleastsomeofthesubjectivedescriptionsusedtodescribemicrophoneperformance.
【中国标准分类号】:M72
【国际标准分类号】:33_160_50
【页数】:54P.;A4
【正文语种】:英语


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【英文标准名称】:NurserystockPart4:Specificationforforesttrees,poplarsandwillows
【原文标准名称】:苗圃.林木、白杨木和柳木规范
【标准号】:BS3936-4-2007
【标准状态】:现行
【国别】:英国
【发布日期】:2007-06-29
【实施或试行日期】:2007-06-29
【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】:货物保管条件;松柏目;尺寸;林业;作标记;苗圃;包装;记录品(文献);根(植物);杨柳科;种子;苗(植物);灌木;造林学;储存;术语;树木(植物)
【英文主题词】:Conditionofgoods;Coniferales;Dimensions;Forestry;Marking;Nurserystock;Packaging;Records(documents);Roots(plants);Salicaceae;Seeds;Shoots(plants);Shrubs;Silviculture;Storage;Terminology;Trees(plants)
【摘要】:ThispartofBS3936specifiesrequirementsforforestnurserystockofasizesuitableforplantingorreplantingofwoodlands,woodlandlandscapesandlandrequiredforotherpurposesinvolvingtreessuchasproductionofChristmastreesandproductionofbiomass.Italsospecifiesrequirementsforplantingstockofpoplarsandwillows.BS3936-4isrelevanttothesupplyoftheyoungtreesandshrubsforplantinginwoodlandthatfallswithinthescopeoftheForestReproductiveMaterial(FRM)Regulations[1].Itisnotlimitedtosuchusesandcanbeappliedtosimilarplantssuppliedforanywoodlandorlandscapeproject.Itincludesspecificationsforplantdescription,plantdimensions,healthandcondition,labelling,andpackagingandstorage,bothforfield-grownandforcell-grownplants.Requirementsspecifiedforplantsbeinggrownforsaleorfortransferthroughmarketprocessesinclude:namingtheiroriginandprovenanceorvarietyand/orcultivar;ageandtheculturalsystemunderwhichtheyareraised;dimensions,includingheightorlength,diameterataspecifiedpointorinrelationtoagivenheight;condition(health);andcarewhensupplyingstocktotheplanter.
【中国标准分类号】:B05
【国际标准分类号】:65_020_20
【页数】:32P.;A4
【正文语种】:英语


【英文标准名称】:Methodsofanalysisoffatsandfattyoils.Physicalmethods.Determinationofsurface-dryingtime
【原文标准名称】:脂肪和脂肪油的分析方法.第1部分:物理方法.第7节:表面干燥时间的测定
【标准号】:BS684Sec.1.7-1976
【标准状态】:作废
【国别】:英国
【发布日期】:1976-10-29
【实施或试行日期】:
【发布单位】:英国标准学会(BSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:试验条件;试样制备;表面性质;时间测量;动物油;干燥;外观检查(试验);植物油
【英文主题词】:testingconditions;timemeasurement;visualinspection(testing);specimenpreparation;animaloils;surfaceproperties;drying;vegetableoils
【摘要】:
【中国标准分类号】:X14
【国际标准分类号】:
【页数】:2P;A4
【正文语种】:英语