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- W2067081657 abstract "The effects of a shallow-water, solitary internal wave on cw and narrow-band acoustic propagation have been studied using computer simulations. Numerous observations have been made of solitary internal waves in shallow water. These internal waves travel along the near-surface thermocline for some distance without loss of coherence. Due to their prevalence, they have been cited as the likely cause of the anomalous effects observed in some recent shallow-water acoustic measurements. In order to test this hypothesis, computer simulations of acoustic propagation through an internal wave have been made using an ocean-acoustic PE propagation computer model (EFEPE), fast Fourier transformations (FFTs), and beamforming algorithms. A narrow band of frequencies was used with the center frequency at 250 Hz. The resulting frequency-dependent fields were then converted into the time domain via an FFT. Beamforming algorithms were used to analyze the field structure. Examples will be shown that contrast the internal wave effects on cw propagation and on narrow-band propagation. [Work supported by ONR and NRL.]" @default.
- W2067081657 created "2016-06-24" @default.
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- W2067081657 date "1993-04-01" @default.
- W2067081657 modified "2023-09-30" @default.
- W2067081657 title "Simulation studies of narrow‐band and cw acoustic propagation through a shallow‐water internal wave" @default.
- W2067081657 doi "https://doi.org/10.1121/1.405857" @default.
- W2067081657 hasPublicationYear "1993" @default.
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