The acoustic characteristics of three fine-grained sediments (silty sand, silt, silty clay) in the South China Sea (SCS) were measured and analyzed at high frequency range 27–247 kHz. measurement results show that sound speed dispersion is a positive linear relation range, attenuation follows nonlinear dependence, α = kfn, where n ranges from 0.59 to 0.85 for different SCS. dependence compared ...