ANSI/ISO 3743-2-1994 声学.声压法测定噪声源声功率级.混响声场中小型可移动声源的工程检测法.第2部分:专用混响试验室法

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【英文标准名称】:Acoustics-Determinationofsoundpowerlevelsofnoisesourcesusingsoundpressure-Engineeringmethodsforsmall,movablesourcesinreverberantfields-Part2:Methodsforspecialreverberationtestrooms
【原文标准名称】:声学.声压法测定噪声源声功率级.混响声场中小型可移动声源的工程检测法.第2部分:专用混响试验室法
【标准号】:ANSI/ISO3743-2-1994
【标准状态】:现行
【国别】:美国
【发布日期】:1994
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:精密度;混响时间;声学测量;封闭式试验室;传声器;声音;声学;声学试验室;直接测定法;便携的;噪声源;噪声测量;数学计算;声学试验;声级;声压;测量仪器;声源;定义;混响室;试验;测定;测量
【英文主题词】:Absorption;Acousticmeasurement;Acoustictesting;Acoustictestingrooms;Acoustics;Closedtestrooms;Definitions;Determination;Directmethod;Environment;Externalnoise;Handling;Information;Insulations;Mathematicalcalculations;Measurement;Measuringincertainity;Measuringinstruments;Measuringtechniques;Methods;Microphones;Noise(environmental);Noisemeasurements;Noisesources;Portable;Powerlevels;Precision;Pressuremeasurement(fluids);Reverberationrooms;Reverberationtime;Sound;Soundabsorption;Soundlevel;Soundpressure;Soundradiation;Soundsources;Soundspectra;Springs(water);Testing
【摘要】:Specifiesarelativelysimpleengineeringmethodfordeterminingthesoundpowerlevelsofsmall,movablenoisesources.Themeasurementsarecarriedoutwhenthesourceisinstalledinaspeciallydesignedroomhavingaspecifiedreverberationtimeoverthefrequencyrangeofinterest.TheA-weightedsoundpowerlevelofthesourceundertestisdeterminedfromasingleA-weightedsoundpressurelevelmeasurementateachmicrophoneposition,ratherthanasummationofoctave-bandlevels.
【中国标准分类号】:Z32
【国际标准分类号】:17_140_01
【页数】:
【正文语种】:英语

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上一篇: ANSI S12.18-1994 室外测量声压级的程序
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【英文标准名称】:TestingofRubberandElastomers;DeterminationoftheLeadContent;ElectrogravimetricandGravimetricMethodforLeadContentsover1000mg/kg(0.1%)
【原文标准名称】:橡胶和弹性体的检验.铅含量的测定.铅含量超过1000mg/kg(0.1%)的用电控重力分析法和重力分析法测定
【标准号】:DIN53599-2-1978
【标准状态】:作废
【国别】:德国
【发布日期】:1978-05
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:准备;铅;硬橡胶;橡胶;生产;含量测定;含量;弹性体;混合物;分析;抽样方法
【英文主题词】:analysis;lead;production;determinationofcontent;rubber;preparation;ebonite;elastomers;content;mixtures;samplingmethods
【摘要】:
【中国标准分类号】:G34
【国际标准分类号】:83_060
【页数】:3P;A4
【正文语种】:德语

Product Code:SAE AS415
Title:Altimeter, Pressure, Compensated (Turbine Powered Subsonic Aircraft) (NONCURRENT Nov 1997)
Issuing Committee:A-4 Aircraft Instruments Committee
Scope:This Aerospace Standard establishes the essential minimum safe performance standards for Pressure Actuated Compensated Altimeters, primarily for use with turbine powered subsonic transport aircraft, the operation of which may subject the instruments to the environmental conditions specified in paragraph 3.3. This Aerospace Standard covers two types of compensated altimeters which indicate, by visual means, the pressure altitude compensated for the static pressure system errors of the aircraft. TYPE I - Range: - 1,000 to 30,000 feet. Barometric pressure - scale range: at least 28.1 - 30.99 in. Hg (952-1049 millibars). May include markers working in conjunction with the Barometric Pressure Scale to indicate pressure altitude. TYPE II - Range: - 1,000 to 60,000 feet. Barometric pressure - scale range: at least 28.1 - 30.99 in. Hg (952-1049 millibars). May include markers working in conjunction with the Barometric Pressure Scale to indicate pressure altitude.