Analysis of the variation of in situ seafloor sediments acoustic characteristics with porosity based EDFM

• DOI: 10.3389/fmars.2023.1270673
• Publication Date: 2023-11-29T05:55:41Z
• Authors: Dapeng Zou; Jin Xie; Xiangmei Meng; Han Sun; Jingchun Feng; Guangming Kan
• Keywords: Seafloor Spreading; Acoustic attenuation

Numerous factors influence the acoustic characteristics of seafloor sediments, necessitating a comprehensive study that combines theoretical analysis, laboratory measurements and in situ to support prediction inversion. In this study, porosity-based effective density fluid model (P-EDFM) is established analyze variation properties with porosity sediments. On biases P-EDFM, attribute measured sound velocity attenuation coefficient sediment Series 9B SAX99 was well interpreted within frequency range 25-100 kHz. The ratio predicated by P-EDFM East China Sea Yellow Sea. It reveals decreases increasing bulk decreasing density. scattering differences sediments are found be greater than those observed for velocity. After considering temperature aligns dataset. While, exhibits an inflection point, initially then changes porosity, similar pattern Hamilton’s observation estimation. By incorporating influences, corrected into velocities using P-EDFM. result samples’ sampling transmitting process has much impact on sandy compared muddy sediment. Overall, can predict under different temperatures frequencies, lower error coefficient.