标准资料网-标准资料免费资源平台

【英文标准名称】:Acoustics.Determinationofsoundpowerlevelsofnoisesourcesusingsoundpressure.Precisionmethodsforanechoicandsemi-anechoicrooms
【原文标准名称】:声学.用声压法测定噪声源声功率级.消声室和半消声室精密法
【标准号】:BSENISO3745-2009
【标准状态】:作废
【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】:声学测量;声学;封闭式试验室;定义;包络面法;实验室测试;实验室试验;数学计算;测量;测量技术;噪声(环境的);噪声测量;噪声源;反射;混响室;声能;声强;声级;声功率;声压;声压级;声源
【英文主题词】:Acousticmeasurement;Acoustics;Closedtestrooms;Definitions;Envelopingsurfacemethods;Laboratorytesting;Laboratorytests;Mathematicalcalculations;Measurement;Measuringtechniques;Noise(environmental);Noisemeasurements;Noisesources;Reflection;Reverberationrooms;Soundenergy;Soundintensity;Soundlevels;Soundpower;Soundpressure;Soundpressurelevel;Soundsources
【摘要】:ThisInternationalStandardspecifiesmethodsformeasuringthesoundpressurelevelsonameasurementsurfaceenvelopinganoisesourceinanechoicandhemi-anechoicrooms,inordertodeterminethesoundpowerlevelorsoundenergylevelproducedbythenoisesource.Itgivesrequirementsforthetestenvironmentandinstrumentation,aswellastechniquesforobtainingthesurfacesoundpressurelevelfromwhichthesoundpowerlevelorsoundenergyleveliscalculated,leadingtoresultswhichhaveagrade1accuracy.ThemethodsspecifiedinthisInternationalStandardaresuitableformeasurementsofalltypesofnoise.Thenoisesourcecanbeadevice,machine,componentorsub-assembly.Themaximumsizeofthesourceundertestdependsontheradiusofthehypotheticalsphere(orhemisphere)usedastheenvelopingmeasurementsurface.
【中国标准分类号】:Z32
【国际标准分类号】:17_140_01
【页数】:56P.;A4
【正文语种】:英语


【英文标准名称】:SpecificationforHigh-StengthLow-AlloyStructuralSteelPlatewithLowCarbonandRestrictedSulfurforImprovedWeldability,Formability,andToughness
【原文标准名称】:为改良可焊接性、可加工性及粘接性用的低碳限硫高强度低合金结构钢板规范
【标准号】:ANSI/ASTMA945/A945M-2000
【标准状态】:作废
【国别】:美国
【发布日期】:2000
【实施或试行日期】:
【发布单位】:美国国家标准学会(ANSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:组件;可焊性;元部件;造船
【英文主题词】:weldability;shipbuilding;components
【摘要】:
【中国标准分类号】:H46
【国际标准分类号】:47_020_05
【页数】:
【正文语种】:英语