【英文标准名称】:WeldedUNSN08800andUNSN08810AlloyTubes
【原文标准名称】:焊接的UNSNO8800和UNSNO8810合金管
【标准号】:ASTMB515-1990
【标准状态】:作废
【国别】:美国
【发布日期】:1990
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:镍;焊接的;铁;有色金属;合金;铬;管;管
【英文主题词】:pipes;alloys;iron;tubes;chromium;welded;nickel;non-ferrousmetals
【摘要】:
【中国标准分类号】:H62
【国际标准分类号】:77_120_40
【页数】:2P;A4
【正文语种】:英语


【英文标准名称】:Acoustics-Audiometrictestmethods-Speechaudiometry
【原文标准名称】:声学.听力测试方法.语言听力测定
【标准号】:BSENISO8253-3-1998
【标准状态】:作废
【国别】:英国
【发布日期】:1998-05-15
【实施或试行日期】:1998-05-15
【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】:听力测定;电声效应;声学测量;信噪比;语言交流;校正;声强;语言识别;维修;声学试验;试验条件;听觉
【英文主题词】:Acoustics;Audiometry;Definition;Definitions;Frequencies;Languages;Levels;Noisetest;Signals;Specification(approval);Speechaudiometers;Speechaudiometry;Testsignals;Testing;Testingconditions
【摘要】:ThispartofISO8253specifiesproceduresandrequirementsforspeechaudiometrywiththerecordedtestmaterialbeingpresentedbyairconductionthroughanearphone,byboneconductionthroughabonevibrator,orfromaloudspeakerforsoundfieldaudiometry.Methodsforusingnoiseeitherformaskingthenon-testearorasacompetingsoundaredescribed.Alltestproceduresarebasedontheuseofopen-settestmaterial.ThispartofISO8253alsocontainsrequirementsonrecordedspeechmaterialandrecommendedproceduresforthemaintenanceandcalibrationofspeechaudiometricequipment.Sometestsubjects,forexamplechildren,mayrequireamendedtestproceduresnotspecifiedinthispartofISO8253.Itisrecognizedthatstandardsforspeechaudiometrycannotbemetusinglivevoicespeechtests,however,guidanceisgiveninaninformativeannexsoastomakesuchtestsasreliableaspossible.ThispartofISO8253doesnotspecifythecontentsofthespeechmaterialbecauseofthevarietyoflanguages.Thetypeoftestmaterialmaysignificantlyinfluencetheresultofspeechaudiometry.SpecializedtestssuchasthoseusedforevaluatingdirectionalhearinganddichotichearingarenotincludedinthispartofISO8253.
【中国标准分类号】:A42
【国际标准分类号】:13_140
【页数】:28P.;A4
【正文语种】:英语