【英文标准名称】:Acoustics-Determinationofsoundpowerlevelsofnoisesourcesusingsoundpressure-Precisionmethodsforreverberationrooms
【原文标准名称】:声学声压法测定噪声源声功率级混响室精密法
【标准号】:ISO3741-1999
【标准状态】:作废
【国别】:国际
【发布日期】:1999-08
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC43
【标准类型】:()
【标准水平】:()
【中文主题词】:混响;测定;声学试验;声级;声学;试验;噪声(环境的);声源;声强;响度
【英文主题词】:Absorption;Acousticmeasurement;Acoustictesting;Acoustics;Airbornenoiseemitted;Calibration;Clay;Concentration;Definitions;Determination;Earprotectors;Environment;Filters;Frequencies;Handling;Hearingabilitytests;Humidity;Indications;Information;Loudnesslevels;Loudspeakers;Machines;Mathematicalcalculations;Measurement;Measuringenvironment;Measuringincertainity;Measuringinstruments;Measuringrooms;Measuringtechniques;Microphones;Noise;Noise(environmental);Noisemeasurements;Noisesources;Observation;Operatingconditions;Position;Powerlevels;Precision;Reverberation;Reverberationroommethod;Reverberationrooms;Rooms;Safetyofmachinery;Sound;Soundabsorption;Soundintensity;Soundlevel;Soundlevels;Soundpower;Soundpressure;Soundsources;Specification(approval);Standarddeviation;Surfaces;Temperature;Testing;Tests;Volume(sound)
【摘要】:1ThisInternationalStandardspecifiesadirectmethodandacomparisonmethodfordeterminingthesoundpowerlevelthatwouldbeproducedbyasourceoperatinginanenvironmentatstandardmeteorologicalconditionscorrespondingtoacharacteristicimpedanceofρc=400N·s/m(whereρisthedensityofairandcisthespeedofsound).Itspecifiestestroomrequirements,sourcelocationandgeneralrulesforoperatingconditions,instrumentationandtechniquesforobtaininganestimateofmean-squaresoundpressurelevelsfromwhichthesoundpowerlevelsofthesourceinoctaveorone-third-octavebandsarecalculatedwithagrade1accuracy.Thequantitiestobemeasuredaretime-averagedsoundpressurelevelsinfrequencybands.Thequantitiestobedeterminedaresoundpowerlevels,A-weightedandinfrequencybands.Otherquantities,whichareoptional,aresoundpowerlevelswithotherfrequencyweightingscalculatedfromthemeasurementsinfrequencybands.Thisstandarddoesnotprovidethemeanstodeterminedirectivityandtemporalvariationofsoundfromasource.Ingeneral,thefrequencyrangeofinterestincludestheone-third-octavebandswithmidbandfrequenciesfrom100Hzto10000Hz.GuidelinesfortheapplicationofthespecifiedmethodsinanextendedfrequencyrangeinrespecttolowerfrequenciesaregiveninannexC.ThisInternationalStandardisnotapplicabletofrequencyrangesabovethe10000Hzone-third-octaveband.ForhigherfrequenciestheuseofmethodsgiveninISO9295isrecommended.2ThemethodspecifiedinthisInternationalStandardissuitableforsteadynoisewithbroad-band,narrow-bandanddiscrete-frequencycomponentsasdescribedinISO12001.Thenoisemaybeemittedfromadevice,machine,componentorsub-assembly.ThisInternationalStandardisapplicabletonoisesourceswithvolumeswhicharepreferablynotgreaterthan2%ofthevolumeofthereverberationroomusedforthetest.Forsourceswithvolumesgreaterthan2%oftheroomvolume,thestandarddeviationsgivenbyTable2couldbeexceeded.
【中国标准分类号】:Z32
【国际标准分类号】:17_140_01
【页数】:32P;A4
【正文语种】:英语


【英文标准名称】:Digitalaudiointerface-Part3:Consumerapplications(IEC60958-3:2006);GermanversionEN60958-3:2006
【原文标准名称】:数字音频接口.第3部分:家用
【标准号】:DINEN60958-3-2007
【标准状态】:作废
【国别】:德国
【发布日期】:2007-02
【实施或试行日期】:2007-02-01
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:适配器;音频设备;音频信号;广播接收机;广播;类别;频道编码;数据交换;数字的;数字声频的;数字工程;数字信号;电气工程;电声学;电子工程;电子仪器;娱乐电子学;(数据)格式;家用;信息技术;互连接;界面;电器连接器接口;特性;无线电接收机;串音;信号传输;声音广播;声道;录音;声技术;声传输;规范(验收);立体声;双道记录;结构;同步;电视广播;传输协议;视频设备
【英文主题词】:Acousticsignals;Adapters;Audioappliances;Audiosignals;Broadcastreceivers;Broadcasting;Categories;Channelcoding;Dataexchange;Digital;Digitalaudio;Digitalengineering;Digitalsignals;Electricalengineering;Electroacoustics;Electronicengineering;Electronicinstruments;Entertainmentelectronics;Formats;Householduse;Informationtechnology;Interconnection;Interfaces;Interfacesofelectricalconnections;Multichannelsound;PCM;Properties;Radioreceivers;Serial;Signaltransmission;Soundbroadcasting;Soundchannels;Soundrecording;Soundtechniques;Soundtransmission;Specification(approval);Structure;Structuring;Synchronization;Televisionbroadcasting;Transmissionprotocol;Videoequipment
【摘要】:ThispartofIEC60958specifiestheconsumerapplicationoftheinterfacefortheinterconnectionofdigitalaudioequipmentdefinedinIEC60958-1.
【中国标准分类号】:M72
【国际标准分类号】:33_160_30
【页数】:64P.;A4
【正文语种】:德语