Abstract
Abstract Underwater acoustic modeling in shallow water environment is difficult since sound waves reflect several times between the surface and the water bottom. This article discusses an underwater acoustic characteristics analysis method based on self-similarity. It is found that acoustic signal has good self-similarity in shallow water. The actual towed hydrophone linear array was established and it was used for underwater acoustic signal acquisition experiment in Qilihai Reservoir which is located in the suburb of Tianjin, China. It can be derived that the signals acquired by hydrophones have self-similarity by the analysis of the variance of m-aggregated time series. It is proved that the characteristics of self-similarity can be used for the sound pulse propagation in shallow water.
Highlights
The hydrophone array plays an increasingly important role in access to the ocean information
We discuss the self-similarity of underwater acoustic signals collected by towed hydrophone array in shallow water environment
We have collected the same period for four different channel underwater acoustic signal variance–time plot graphics, verified its stable self-similar characteristics
Summary
The hydrophone array plays an increasingly important role in access to the ocean information. Active acoustic detection methods can be used for real-time monitoring of marine fish density and behavior [1-3]. Compared with the traditional way, the method of ocean acoustic waveguide and hydrophone linear array can implement thousands of square kilometers of real-time imaging, and continuous monitoring in specified sea water. Norwegian Gullfaks oil field went into operation in 1986. In order to improve the efficiency of field collection, the four time-lapse seismic measurements were fulfilled in 1985 (baseline data), 1995, 1996, and 1999, respectively. Through time-lapse seismic data, they carried out analysis and forecasting the movement of water injected. Swanston et al [5] compared the seismic data of a drilling platform in the Gulf of Mexico in before and after 8 years of mining, the difference of sound respond between water and the hydrocarbon
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