简介：Toaimattheproblemthatthehorizontaldirectivityindexofthevectorhydrophoneverticalarrayisnothigherthanthatofavectorhydrophone,thehigh-resolutionazimuthestimationalgorithmbasedonthedatafusionmethodwaspresented.TheproposedalgorithmfirstemploysMUSICalgorithmtoestimatetheazimuthofeachdividedsub-bandsignal,andthentheestimatedazimuthsofmultiplehydrophonesareprocessedbyusingthedatafusiontechnique.Thehigh-resolutionestimatedresultisachievedfinallybyadoptingtheweightedhistogramstatisticsmethod.TheresultsofthesimulationandseatrialsindicatedthattheproposedalgorithmhasbetterazimuthestimationperformancethanMUSICalgorithmofasinglevectorhydrophoneandthedatafusiontechniquebasedontheacousticenergyfluxmethod.Thebetterperformanceisreflectedintheaspectsoftheestimationprecision,theprobabilityofcorrectestimation,thecapabilitytodistinguishmulti-objectsandtheinhibitionofthenoisesub-bands.

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简介：从不同光谱形状在水表面上与非线性的最少平方的回归相结合到份量上估计降雨率的一个方法由雨产生了--在一些频率乐队的秋天被介绍。降雨产生的大约2000min光谱数据被收集了在一在厦门开湖城市。作为结果，在15-30kHz的光谱形状被适合到从没有雨，毛毛雨降雨率10mm/h和大雨降雨评估的光谱斜坡允许雨的分类进三个范畴的木头线性的法律10ram/h。然后，降雨察觉被做，降雨率在2-15的频率乐队与逻辑模型一起在毛毛雨时间被确定kHz，和在重降雨的降雨率也与木头线性的回归确定了。最后，所有测量光谱数据被用来与算法计算降雨率。结果证明估计的降雨率与同时地测量的是可比较地重合的。积聚的降雨的平均错误仅仅每min是1%-4%。

简介：Whenthesignalsreceivedbyanytwoarrayelementsarenotfullycorrelated,theperformanceofDOA(DirectionOfArrival)estimationmethodsmightdegradeiftheplane-wavemodelassumptionisstillused.Fornarrowbanduniformlineararray,byutilizingthepropertyofToeplitzmatrix,itisprovedthatthereceivedsignalscanbeexpressedasthesumofseveralplane-wavesignals,whichcanbeviewedasthe'splitting'partsofthetruesources.The'splitting'ofsourcesmakesitdifficulttoestimatethetruenumberofsources.Asaresult,spuriouspeaksmightoccurinthespatialspectrumwhensubspace-basedhigh-resolutionspatialspectrumestimationtechniqueisused.

简介：用听觉的掩盖的低声说的讲话改进在修改Mel-的模型领域和讲话缺席概率树液被建议。考虑到发声字符--耳语的acteristic，我们修改可伸缩的Mel频率模型。低声说的讲话被建议模型过滤。同时，为每个频率乐队掩盖阀值的价值被讲话缺席概率动态地决定。然后低声说的讲话改进被适应地用不同掩盖的阀值价值修正光谱减法系数进行。提高的低声说的信号上的客观、主观的测试的结果与另外的方法相比显示出那；建议方法能由在掩盖的阀值价值下面减少音乐噪音和背景噪音与更好主观的听觉的质量和更少的失真提高低声说的信号。

简介：Combinedthedecompositionoftimereversaloperatorandthetimereversalre-verberationnulling,anewtimereversalprocessingapproachforecho-to-reverberationratioenhancementisproposed.Inthismethod,a2-dimensionalsignalsubspacefortherangeofthetargetandtwobottomfocusingweightvectorsfortherangesnearthetargetareobtainedbythedecompositionoftimereversaloperator.Fromthesignalsubspaceandfocusingweightvectors,aconstrainedoptimalexcitationweightvectorofsourcereceiverarraycanbededucedtonulltheacousticenergyonthecorrespondingbottomandmaximizetheenergyatthetar-get.Thismethodremediestheshortagesofconventionaltimereversalprocessing,timereversalreverberationnullingandtimereversalselectivefocusingmethod.Itfocusessoundenergyatthetargetandnullstheenergyatthebottomnearthetargetrangesimultaneously,thereforeenhancingtheecho-to-reverberationratiowithoutprobesourceandprior-knowledgeoftherel-ativescatteringintensityoftargetandbottom.Numericalsimulationsintypicalshallowwaterenvironmentsshowedtheeffectivenessoftheproposedmethodanditsimprovedperformanceforecho-reverberationenhancementthanconventionaltimereversalprocessing.

简介：BasedonthenoisesurveyinChina,theformula（H′=H+N-HN/120）ofISO/DIS1999.2（"Acous-tics-DeterminationofOccupationalnoiseexposureandestimationofnoise-inducedhearingimpairment,1985）wasappliedtothecalculationofthehearingthresholdlevelassociatedwithageandnoise（HTLAN）ofthenoise-impairedpeople.AccordingtotheGaussciandistribution,whenthenoise-exposurelevelLEX8hwas85,90,95,100dBandthehearingthresholdfrequencyisfrom0.5kto6kHz,theHTLANofnoise-exposedpeoplewithdifferentdurationofexposureanditsrelationvaluestothehearingthresholdfrequencyassociatedwithage（HTLA）wereobtained.TheISO/DIS1999.2hasbeenprovedtobeapplicableinChina.

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简介：InordertosolvetheproblemofDOA(directionofarrival)estimationofunderwaterremotetargets,anovelsubspace-decompositionmethodbasedonthecrosscovariancematrixofthepressureandtheparticlevelocityofacousticvectorsensorarrays(AVSA)wasproposed.Whereafter,usingspatio-temporalvirtualtapped-delay-line,aneweigenvector-basedcriteriaofdetectionofnumberofsourcesandofsubspacepartitionisalsopresented.ThetheoreticalanalysisshowsthatthenewsourcedetectionanddirectionfindingmethodisdifferentfromexistingAVSAbasedDOAestimationmethodsusingparticlevelocityinformationofacousticvectorsensor(AVS)asanindependentarrayelement.Itisentirelybasedonthecombinedinformationprocessingofpressureandparticlevelocity,hasbetterestimationperformancethanexistingmethodsinisotropicnoisefield.Computersimulationswithdatafromlaketrialsdemonstrate,theproposedmethodiseffectiveandobviouslyoutperformsexistingmethodsinresolutionandaccuracyinthecaseoflowsignal-to-noiseratio(SNR).

简介：以便解决DOA(到达的方向)的问题评价在水下远宽带目标，一个新奇协调signal-subspace方法基于十字光谱压力的矩阵和用声学的向量传感器数组(AVSA)的粒子速度在这份报纸被建议。建议方法与在把声学的向量传感器(AVS)的粒子速度信息用作一个独立人士的基于的DOA评价方法穿的存在AVSA不同元素。也就是，它完全基于压力和粒子速度的联合信息处理P-V生气光谱，在各向同性的噪音比存在方法有更好的DOA评价性能地。由理论分析，基于P-V集中原则和eigendecomposition理论的两个交叉光谱矩阵是given.At一样的时间，为数字察觉也是的来源的相应标准有从湖试用的数据的presented.Computer模拟证明建议方法是有效的并且显然超过存在在分辨率的方法和在低Signal-to-Noise比率(SNR)的情况中的精确性。