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- W2351827849 abstract "Researches indicate that a visible notch often appears in the horizontal direction of the vertical noise direc-tionality in typical summer sea.In this paper,the three-dimensional sound speed profile-ambient noise model is adopted to analyze the contribution of every mode to the vertical directionality,and the differences of contribution are pointed out.The high order modes are the main cause to the noise notch,while the low order modes can fill the notch.When internal waves are absent,the low order modes are weakly excited,the 'fill' ability is feeble and the notch is visible.In the internal wave field,internal waves change the sound signal propagation paths to cause the conversion between different modes.Low order modes are strengthened and higher order modes are weaken,the notch becomes shallow.Besides,the relation of the 'fill' degree with the strength of internal waves and the variation of the vertical directionality with time are discussed." @default.
- W2351827849 created "2016-06-24" @default.
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- W2351827849 date "2011-01-01" @default.
- W2351827849 modified "2023-09-28" @default.
- W2351827849 title "Effect of internal wave on horizontal notch of ambient noise in shallow water" @default.
- W2351827849 hasPublicationYear "2011" @default.
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