TY JOUR TI ACOUSTICAL METHOD FOR ESIMATING WATER BED BIOLOGICAL CONTAMINATION LEVEL KW marine sediments KW phase-velocity dispersion KW intergranular friction KW gas-saturated sediments KW rate of decay KW reflection coefficient KW bottom impedance JO Russian Journal of Biological Physics and Chemisrty AU Lisyutin, V.A. AU Lastovenko, O.R. AU Petrenko, N.V. PY 2018 IS 3 PB Federal State Educational Institution of Higher Education Sevastopol State University