MIL-T-6737C, MILITARY SPECIFICATION: TUBING, STEEL, CORROSION AND HEAT RESISTING (18-8 STABILIZED), WELDED (01 DEC 1982) [S/S BY SAE-AMS5575 AND SAE-AMS5576]., This specification prescribes the requirements for welded tubing of stabilized corrosion-resisting and heat-resisting steel in the annealed condition.【英文标准名称】:Acoustics-Laboratorymeasurementproceduresforductedsilencersandair-terminalunits-Insertionloss,flownoiseandtotalpressureloss
【原文标准名称】:声学.风道消音装置和风道末端装置的实验室测量程序.插入损失、流动噪声和总压力损失
【标准号】:BSENISO7235-2009
【标准状态】:现行
【国别】:英国
【发布日期】:2010-04-30
【实施或试行日期】:2010-04-30
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Absorption;Acousticmeasurement;Acoustictesting;Acoustics;Airducts;Airflow;Attenuationconstant;Cables;Calibration;Canals;Checkingequipment;Classes;Corrrections;Damping;Definitions;Ducts;Enginesilencers;Equipment;Externalnoise;Fans;Flow;Graphicsymbols;Handling;Insertionloss;Laboratories;Laboratorytesting;Laboratorytests;Loudspeakers;Measurement;Measurementcircuits;Measuringducts;Measuringenvironment;Measuringequipment;Measuringinstruments;Measuringobjects;Measuringtechniques;Microphonearrangement;Microphones;Mineralwool;Noise;Noiseabatement;Noise(environmental);Noisemeasurements;Performancetests;Precision;Pressuredrops;Reflection;Reverberationrooms;Silencers;Sonictesting;Sound;Soundabsorption;Soundfields;Soundintensity;Soundlevel;Soundlevels;Soundmeters;Soundpressure;Soundpressurelevel;Soundsources;Structure-bornenoise;Symbols;Testfurnaces;Testresults;Testing;Testingset-ups;Transmittances;Ventilationductwork;Ventilationequipment;Walls
【摘要】:ThisInternationalStandardspecifiesmethodsfordetermining?theinsertionloss,infrequencybands,ofductedsilencerswithandwithoutairflow,?thesoundpowerlevel,infrequencybands,oftheflownoise(orregeneratedsound)generatedbyductedsilencers,?thetotalpressurelossofsilencerswithairflow,and?thetransmissionloss,infrequencybands,ofair-terminalunits.Themeasurementproceduresareintendedforlaboratorymeasurementsatambienttemperature.MeasurementsonsilencersinsituarespecifiedinISO11820.ItistobenotedthattheresultsdeterminedinalaboratoryaccordingtothisInternationalStandardwillnotnecessarilybethesameasthoseobtainedinsitu(installation),asdifferentsoundandflowfieldswillyielddifferentresults.Forexample,thepressurelosswillbelowerunderlaboratoryconditionsthaninsitu,butwillbecomparablebetweendifferentlaboratories.ThisInternationalStandardisapplicabletoalltypesofsilencerincludingsilencersforventilatingandairconditioningsystems,airintakeandexhaustoffluegases,andsimilarapplications.Otherpassiveair-handlingdevices,suchasbends,air-terminalunitsorT-connectors,canalsobetestedusingthisInternationalStandard.ThisInternationalStandardisnotapplicabletoreactivesilencersusedformotorvehicles.
【中国标准分类号】:P31
【国际标准分类号】:91_120_20
【页数】:60P.;A4
【正文语种】:英语