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 characte...

In a study involving 10 different sites, independent results of measurements of ultrasonic properties on equivalent tissue-mimicking samples are reported and compared. The properties measured were propagation speed, attenuation coefficients, and backscatter coefficients. Reasonably good agreement exists for attenuation coefficients, but less satisfactory results were found for propagation speed...

A model for the acoustic production of gravitational waves at a first-order phase transition is presented. The source of gravitational radiation is the sound waves generated by the explosive growth of bubbles of the stable phase. The model assumes that the sound waves are linear and that their power spectrum is determined by the characteristic form of the sound shell around the expanding bubble...

The sound speed of a two-phase fluid, such as a magma-gas, water-air, or water-steam mixture, is dramatically different from the sound speed of either pure component. In numerous geologic situations the sound speed of such two-phase systems may be of interest: in the search for magma reservoirs, in seismic exploration of geothermal areas, in prediction of P wave velocity decreases prior to eart...

Introduction The trend of sound speed profile (SSP) inversion is towards wide-area estimation. However, the traditional method dividing latitude and longitude grids has limitations in terms significantly lower accuracy when samples are lacking. k-means clustering algorithm (K-means) can divide training class to achieve high Method This paper proposes a grid-free pre-classification scheme based ...