Influence of Semiconsolidated Sediments on Sound Propagation in a Coastal Region
In 1976, acoustic measurements were performed in shallow water off the coast of Jacksonville, Florida. Seismic refraction and Stonely wave experiments, performed as part of the measurement program, revealed that the seabed at the measurement site consisted of a semiconsolidated sediment overlain by a thin layer of sand. Compressional and shear wave velocities determined for the semiconsolidated sediment layer were 2400 m/sec and 670 m/sec, respectively. Using a normal-mode model that includes the effects of sediment rigidity, the attenuation of the first acoustic normal mode was computed and compared with experimental results for frequencies of 40 Hz to 800 Hz.
KeywordsSeismic Refraction Bottom Model Apply Research Laboratory Mode Attenuation Modal Wavenumber
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- 2.J. L. Worzel and M. Ewing, “Explosion Sounds in Shallow Water,” Geol. Soc. Am. Mem. 27 (1948).Google Scholar
- 4.R. D. Stoll, “Acoustic Waves in Saturated Sediments,” in: Physics of Sound in Marine Sediments, Loyd Hampton, ed., Plenum Press, New York (1974).Google Scholar
- 6.N. A. Haskell, “The Dispersion of Surface Waves on Multilayered Media,” Bull. Seism. Soc. Am. 43, 17–34 (1953).Google Scholar