反射還是散射？聲納音場模擬有限長度波串的海床反應SimulationWherethesignalcomesfrom?Weneedalasergun!Whatisthe“footprint”ofsonar?Onelaserisnotenough!當我們希望『火力集中』時我們使用長的縱向槍管，但是希望聲波集中時，是將聲源『橫向展開』！Nothingisperfect,mainandsidelobes.Moresonarelementsinanarray,higherdirectivityobtainedHydrophonesarealso:Themorethebetter!Wrongdirection↓Wrongphase↓SignaldiminishedBeamSteeringMulti-beamreceiverNotprojector!ProjectorMillsCrossSidescan&Multi-beamSyntheticApertureSyntheticApertureforSonarInterferometerMB?Interferometer(IMF)與BeamSteeringMB的差異：MB+IFM=BestSolution聲納研究前景國內聲納研究的幾個問題結論