2022年第46卷第12期25AcousticsFoundatioN声学基础声学基础文献引用格式:陶芙宇,王曜坤,李勤,等.有限空间下次声源聚能辐射方法分析[J].电声技术,2022,46(12):25-29,35.TAOFY,WANGYK,LIQ,etal.Analysisofinfrasoundsourceconcentratedradiationmethodsinconfinedspace[J].AudioEngineering,2022,46(12):25-29,35.中图分类号:TN912.2文献标识码:ADOI:10.16311/j.audioe.2022.12.006有限空间下次声源聚能辐射方法分析陶芙宇,王曜坤,李勤,陶文波(中国电子科技集团公司第三研究所,北京100015)摘要:声源在开放场通常以点源向四周进行辐射。为了使声源具备指向性发射能力,需要采取一些手段使声源固定方向汇聚。然而,低频声信号波长较长,尤其是次声信号,波长可达到十几米甚至几十米,很难在有限空间内形成指向性。针对低频声信号波长较长,有限空间内不易汇聚形成波束指向的问题,分别对多声源组阵、凹面镜聚能和号筒聚能等方法进行讨论、分析,并通过仿真试验,验证各类方法的聚能辐射性能。关键词:次声源;能量汇聚;声辐射;声学号筒AnalysisofInfrasoundSourceConcentratedRadiationMethodsinConfinedSpaceTAOFuyu,WANGYaokun,LIQin,TAOWenbo(TheThirdResearchInstituteofChinaElectronicsTechnologyGroupCorporation,Beijing100015,China)Abstract:Thesoundsourceusuallyradiatestothesurroundingsasapointsourceinanopenfield.Inordertomakethesoundsourcecapableofdirectionalemission,itisnecessarytotakesomemeasurestomakethesoundsourceconvergeinafixeddirection.However,itisdifficulttoformdirectivityinlimitedspacesincethewavelengthoflow-frequencyacousticsignalsislong,ofwhichitsinfrasoundsignalscanreachmorethantenmetersoreventensofmeters.Aimingattheproblemthatlow-frequencyacousticsignalshavelongwavelengthsandarenoteasytoconvergetoformbeamsinalimitedspace,severalmethodsofmultisoundsourcearray,concavemirrorenergyconvergenceandhornenergyconvergencearediscussedandanalyzedrespectively,andthefocusedradiationperformanceofeachmethodisverifiedbysimulationtests.Keywords:infrasoundsource;energyconvergence;soundradiation;acoustichorn0引言人类对次声发声源的研究由来已久。1939年至1945年间,美国首次尝试使用蒸汽驱动的风琴管产生人工次声。二战期间,英国、日本、...