NF C98-011-1991 电信网络用连接器材安全的特殊规则.(欧洲标准EN41003)

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【英文标准名称】:Acoustics-Determinationofsoundpowerlevelsandsoundenergylevelsofnoisesourcesusingsoundpressure-Precisionmethodsforreverberationtestrooms
【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】:ISO3741-2010
【标准状态】:现行
【国别】:国际
【发布日期】:2010-10-01
【实施或试行日期】:2010-10-01
【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】:吸收;声学测量;声学试验;声学;发出的空气噪声;音频系统;校准;浓缩;定义(术语);测定;护耳器;环境;过滤器;频率;处理;听力试验;湿度;指示;信息;响度级;扬声器;低频;机械;数学计算;测量;测量环境;测量不确定度;测量仪器;测量室;测量技术;传声器;噪声;噪声(环境的);噪声测量值;噪声源;观察;使用条件;位置;功率等级;精密度;混响;混响室法;混响室;房屋;机械安全性;声音;吸声;声强;声级;噪声值;声功率;声压;声源;规范(验收);标准差;表面;温度;测试;音量
【英文主题词】:Absorption;Acousticmeasurement;Acoustictesting;Acoustics;Airbornenoiseemitted;Audiosystems;Calibration;Concentration;Definitions;Determination;Earprotectors;Environment;Filters;Frequencies;Handling;Hearingabilitytests;Humidity;Indications;Information;Loudnesslevels;Loudspeakers;Lowfrequencies;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;Volume(sound)
【摘要】:ThisInternationalStandardspecifiesmethodsfordeterminingthesoundpowerlevelorsoundenergylevelofanoisesourcefromsoundpressurelevelsmeasuredinareverberationtestroom.Thesoundpowerlevel(or,inthecaseofnoiseburstsortransientnoiseemission,thesoundenergylevel)producedbythenoisesource,infrequencybandsofwidthone-third-octave,iscalculatedusingthosemeasurements,includingcorrectionstoallowforanydifferencesbetweenthemeteorologicalconditionsatthetimeandplaceofthetestandthosecorrespondingtoareferencecharacteristicimpedance.Measurementandcalculationproceduresaregivenforbothadirectmethodandacomparisonmethodofdeterminingthesoundpowerlevelandthesoundenergylevel.Ingeneral,thefrequencyrangeofinterestincludestheone-third-octavebandswithmid-bandfrequenciesfrom100Hzto10000Hz.GuidelinesfortheapplicationofthespecifiedmethodsoveranextendedfrequencyrangeinrespecttolowerfrequenciesaregiveninAnnexE.ThisInternationalStandardisnotapplicabletofrequencyrangesabovethe10000Hzone-third-octaveband.NOTEForhigherfrequencies,themethodsspecifiedinISO9295canbeused.
【中国标准分类号】:Z32
【国际标准分类号】:17_140_01
【页数】:68P.;A4
【正文语种】:英语

标准名称：	龙舌兰麻抗病性鉴定技术规程
发布部门：	中华人民共和国农业部
发布日期：	2010-09-21
实施日期：	2010-12-01
首发日期：
作废日期：
出版社：	中国农业出版社
出版日期：	2010-12-01

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