【英文标准名称】:Electroacoustics-Hearingaids-Part4:Inductionloopsystemsforhearingaidpurposes-Magneticfieldstrength
【原文标准名称】:电声学.助听器.第4部分:助听器的声频感应线圈.磁场强度
【标准号】:IEC60118-4-2006
【标准状态】:现行
【国别】:国际
【发布日期】:2006-10
【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;音频;听力测定;定义;电气工程;电声学;电磁感应;场强(电);频率;助听器;感应;感应环路;磁场测量;磁场强度;磁场;测量;测量技术;无线电话;规范(验收);声频
【英文主题词】:Acoustics;Audiofrequencies;Audiometry;Definitions;Electricalengineering;Electroacoustics;Electromagneticinduction;Electromagnetism;EMC;Fieldstrength(electric);Frequencies;Hearingaids;Induction;Inductionloops;Interferingnoise;Languages;Magneticfieldmeasurement;Magneticfieldstrength;Magneticfields;Magnetism;Measurement;Measuringtechniques;Noiselevels;Radiotelephony;Specification(approval);Voicefrequency
【摘要】:Thisinternationalstandardisapplicabletoaudio-frequencyinductionloopsystemsproducinganalternatingmagneticfieldataudiofrequenciesandintendedtoprovideaninputsignalforhearingaidsoperatingwithaninductionpick-upcoil.Thestandardspecifiesrequirementsforthefieldstrengthinaudio-frequencyinductionloopsforhearingaidpurposes,whichwillgiveadequatesignal-to-noiseratiowithoutoverloadingthehearingaid.Thestandardalsospecifiestheminimumfrequencyresponserequirementsforacceptableintelligibility.Methodsformeasuringthemagneticfieldstrengtharespecified,andinformationisgivenonappropriatemeasuringequipment(seeAnnexB),informationthatshouldbeprovidedtotheoperatorandusersofthesystem(seeAnnexC),andotherimportantconsiderations.Thestandarddoesnotspecifyrequirementsforloopdriveramplifiersorassociatedmicrophoneoraudiosignalsources,orforthefieldstrengthproducedbyequipment,suchastelephonehandsets,withinthescopeofITU-TP.370.
【中国标准分类号】:L31
【国际标准分类号】:11_180_15
【页数】:81P.;A4
【正文语种】:英语