SAE ARP906 Glossary, Aircraft Engine Starting and Auxiliary Power Systems
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来源:标准资料网
Product Code:SAE ARP906
Title:Glossary, Aircraft Engine Starting and Auxiliary Power Systems
Issuing Committee:Ae-6 Starting Systems And Auxiliary Power Committee
Scope:The purpose of this glossary is to present specific definitions of terms commonly encountered and associated with aircraft engine starting systems, and to promote their usage throughout the aviation industry. Usage of the terms presented herein will serve to promote clarity and avoid misunderstandings. Terms have been arranged alphabetically.
【英文标准名称】:Acoustics-Measurementoftheinsitusoundattenuationofaremovablescreen
【原文标准名称】:声学.可移动声屏障声衰减的现场测量
【标准号】:BSENISO11821-1997
【标准状态】:现行
【国别】:英国
【发布日期】:1997-10-15
【实施或试行日期】:1997-10-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:性能试验;可拆卸的;误差修正;现场试验;噪声控制;衰减;吸收(波);声学测量;噪声控制装置;遮板(隔墙);声学试验;隔音;声试验
【英文主题词】:
【摘要】:ThisInternationalStandardspecifiesmethodsforevaluatingtheinsitusoundattenuationperformanceofaremovablescreen,eitherindoorsoroutdoors.Thisengineeringgrademethodisbasedonaninsertionlossmeasurementthatcanbecarriedouteitherwithshieldingoftheactualsoundsource(s)orusinganartificialsoundsource.Thesoundattenuationperformanceachievedbysuchascreen,asevaluatedbythepresentInternationalStandard,dependson:—diffractionaroundtheedgesofthescreen;—transmissionthroughthecomponentsofthescreen;—absorptionofthepanelsofthescreen,aswellasinitssurroundings;—theroominwhichthescreenstandsifindoors.Whenaspecificworkstationistobeshielded,theinsitusoundattenuationvaluedescribestheeffectofthescreen.However,whenacompleteareaistobeshielded,theperformanceofthescreenwillvarydependingonthepositionsusedformeasurement.Therefore,itisrecommendedthatthemaximumandminimumvaluesofsoundattenuationaregiven.Thesoundattenuationperformanceisdeterminedintermsofinsertionloss.Whenassessingtheperformanceofascreenlocatedindoors,theroomgeometryandreflectionsfromwalls,ceilingsandroomfittingswillinfluencetheperformance.Asaconsequence,thecomparisonofscreenperformancecanonlybemadeifthetestconditionsareidentical.ThisInternationalStandardisapplicabletoscreenswithheightandlengthgreaterthan1,5m.However,itmayalsobeusedforsmallerscreensprovidedthattheinterestedpartiescometoanagreementonthis.Asenvironmentalconditionscanaffectthemeasurementsoutdoors,itisrecommendedthatmeasurementsshouldberestrictedtowithin25mofthescreen.However,measurementsmayalsocoveragreaterdistanceprovidedthattheinterestedpartiescometoanagreementonthis.Differencescanoccurbetweeninsitutestresults.Therefore,comparisonoftheperformanceofdifferentscreenscanbemadeonlyonthebasisofdatabasedonthesamemeasurementmethodperformedatthesamelocation.ThisInternationalStandardappliestoacompletescreenonlyandnottoindividualcomponentsfromwhichitismade.Soundinsulationandsoundabsorptionforscreencomponents(suchaspanelelements,doors,windows)shouldbemeasuredaccordingtootherrelevantstandards.ThisInternationalStandardisnotapplicabletoopenplanofficesscreensnortooutdoorbarriersdealingwithcommunitynoise.Itisalsonotintendedforqualificationpurposes.
【中国标准分类号】:A42
【国际标准分类号】:17_140_99
【页数】:20P;A4
【正文语种】:英语
基本信息
| 标准名称： | 未使用过的润滑油基础油及无沥青质石油馏分中稠环芳烃（PCA）含量的测定 二甲基亚砜萃取折光指数法 |
| 发布部门： | 国家能源局 |
| 发布日期： | 2010-05-01 |
| 实施日期： | 2010-10-01 |
| 首发日期： | |
| 作废日期： | |
| 出版社： | 中国石化出版社 |
| 出版日期： | 2010-10-01 |
适用范围
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