【英文标准名称】:Acoustics-Measurementofsoundinsulationinbuildingsandofbuildingelements-Laboratorymeasurementofroom-to-roomairborneandimpactsoundinsulationofanaccessfloor
【原文标准名称】:声学.建筑物和建筑构件的隔音测量.房间与房间空气和进门处冲击声隔绝的实验室测量
【标准号】:BSENISO140-12-2000
【标准状态】:作废
【国别】:英国
【发布日期】:2000-04-15
【实施或试行日期】:2000-04-15
【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】:精密度;冲击声隔绝;声学测量;隔音;声试验;高度;试验设备;建筑系统构件;混响时间;声音吸收;传声器;楼板;尺寸;频率;空气声隔绝(隔声);试验条件;遮板(隔墙);时间;建筑物;实验室试验;压力
【英文主题词】:
【摘要】:Thisstandardspecifiesalaboratorymethodtomeasuretheairborneandimpactsoundinsulationofanaccessfloorwithaplenumofdefinedheightmountedbelowanacousticalbarrierwhichseparatestworoomsofaspecifiedtestfacility.Thismethodutilizesalaboratoryspacearrangedinsuchamannerthatitsimulatesapairofhorizontallyadjacent,typicalofficesorroomssharingacommonaccessfloorsystem,plenumspaceandadividingwall.Thedividingwallextendsfromtheceilingtotheuppersideofthefloorsystemwhichatthejunctioniseithercontinuousordiscontinuous.Thequantitiesbeingmeasuredaretheairborneandimpactsoundinsulationbetweentworoomsofaspecifiedtestfacilitywhenthesoundtransmittedbypathsotherthantheaccessfloorandcommonplenumspaceisnegligible.Thesequantitiesarecalledthenormalizedflankingleveldifferenceandthenormalizedflankingimpactsoundpressurelevel.Themethodcanbeextendedtothestudyoftheadditionalsoundinsulationthatcanbeachievedbyauxiliarysystems,suchasmaterialusedeitherasplenumbarriersorasbackingforallof,orpartofthefloor.
【中国标准分类号】:P31
【国际标准分类号】:91_120_20
【页数】:18P;A4
【正文语种】:英语


Product Code:SAE J1541
Title:Fuel Injection Nomenclature--Spark Ignition Engines
Issuing Committee:Gasoline Fuel Injection Standards Committee
Scope:This SAE Recommended Practice was developed to provide a common understanding and usage of the technical terms useful in fuel injection systems for spark ignition engines. Additional nomenclature related to specific components is covered in the individual component sections.