Study on the effect of seafloor sound speed dispersion on sound propagation

Abstract As one of the boundaries ocean waveguide, acoustic properties seafloor sediments have been a hot research problem in propagation and field modeling. The existing has shown that sound velocity sediment is frequency dependent. In order to solve sedimentary speed dispersing often be ignored actual applications, this article uses parabolic Newton iterate dispersion equation obtain characteristic value normal mode. And impact through simulation are studied. results show wave time domain will appear more obvious broadening phenomenon, loss reduced after considering sediment. Also, with increase frequency, effect on range dispersion.