【英文标准名称】:Soundsystemequipment-Headphonesandearphonesassociatedwithportableaudioequipment-Maximumsoundpressurelevelmeasurementmethodologyandlimitconsiderations-Generalmethodfor"onepackageequipment"
【原文标准名称】:音响系统设备.与便携声学设备相连的耳机和头戴送受话器.最大声压水平测量方法学和限制.成套设备通用方法
【标准号】:BSEN50332-1-2000
【标准状态】:现行
【国别】:英国
【发布日期】:2000-11-15
【实施或试行日期】:2000-11-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:声强;声学测量;声学设备;头戴送受话器;便携的;音频系统;耳机;安全措施;音频设备;声学
【英文主题词】:Acousticequipment;Acoustics;Acoustoelectricdevices;Audioappliances;Definition;Definitions;Earphones;Electricappliances;Electricalengineering;Electroacoustics;Entertainmentelectronics;Headphones;High-fidelity;Instruments;Measuredvalue;Measurement;Measurementset-up;Measuringfrequencies;Measuringtechniques;Performance;Portable;Soundintensity;Soundpressurelevel;Testing;Transmissiondevices
【摘要】:Thescopeofthisstandardistosetupasuitablemeasuringmethodologyallowingaccuratemeasurementofthemaximumsoundpressurelevelproducedbyconsumer'sheadphonesandearphoneswhenassociatedwithportableaudioequipment.NOTEThisstandarddoesnotapplytoacousticallyopenoracousticallyclosedheadphonesassociatedwithmainsoperatedHi-Fihomeequipementnordoesitapplytoheadphonesformedicalpurposes(hardofhearing,etc.)ortoheadphonesorsimilarpartsbeingpartofactivehearingprotectionsystems.Wirelessheadphonesareneitherincluded,conditionsforthemmaybederivedaccordingly.Otherrequirementsforsafety,e.g.fornoiseprotectioninofficesandindustryarenotaffectedbythisstandard.Requestedfeatures:-Themethodshouldbereproducibleandeasilyapplicabletoeverytypeandshapeofheadphoneorearphoneavailableonthemarket(goodmechanicaladaptability).-Assafetyandhealthareaddressed,themethodshouldfaithfullyreflectthepressureleveleffectiveattheuser'shearing(goodcorrelationwithsubjectivetests).-Andfinally,itisdesirabletoestablishaglobalmeasuringprocedure,includingeachcomponentinthechain:Portableset+specifictestsignal+associatedheadphoneorearphone.Thestandardissplitintotwoparts:-Part1dealswithsetsprovidedasapackageequipmentbythemanufacturer.Inthiscase,"Portableaudioequipment"meanstheassociationofoneset(compactcassetteplayer,CDplayer,FMradioreceiver,withitsheadphoneorearphone.-Part2(underconsiderationatpresenttime)givesguidelinestoassociateportableaudiosets(compactcassetteplayer,CDplayer,FMradioreceiver,...)withheadphonesorearphonescomingfromadifferentmanufacturer.
【中国标准分类号】:L31
【国际标准分类号】:17_140_50;33_160_50
【页数】:12P.;A4
【正文语种】:英语


Product Code:SAE AMS5587
Title:Nickel Alloy, Corrosion and Heat Resistant, Seamless Tubing, 47.5Ni - 22Cr - 1.5Co - 9.0Mo - 0.60W - 18.5Fe, Solution Heat Treated
Issuing Committee:Ams F Corrosion Heat Resistant Alloys Committee
Scope:This specification covers a corrosion and heat resistant nickel alloy in the form of seamless tubing.