A.V. Vagin1

1 St. Petersburg Electrotechnical University “LETI” (St. Petersburg, Russia)
1 av.vagin@bk.ru

The need for practical development of the World Ocean leads to the modernization of existing hydroacoustic equipment in order to increase the efficiency of hydrographic and search and survey work. The main means of studying the seabed and layers of bottom soil are: a multibeam echo sounder, an acoustic profiler.

Some of the main characteristics when performing search and survey work that affect the efficiency of the hydroacoustic equipment are weight and size characteristics, operating depth, range, resolution, and in the case of acoustic profiling – the depth of penetration of the probing signal into the soil (profiling depth). By profiling depth we mean the maximum depth of probing the bottom soil, which is determined by the depth of the lower layer of the bottom soil, which has a high reflection coefficient in the given hydrological conditions at the given levels of hydroacoustic interference, the probabilities of correct detection and false alarm.

One of the directions for improving the above characteristics and eliminating the shortcomings of linear systems is the construction of a hydroacoustic device based on the principles of nonlinear acoustics, the so-called parametric operating mode.

Vagin A.V. Bottom soil profiling using parametric radiation. Nonlinear World. 2025. V. 23. № 4. P. 69–78. DOI: https:// doi.org/10. 18127/j20700970-202504-08 (In Russian)

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