ASA 129th Meeting - Washington, DC - 1995 May 30 .. Jun 06

2pUW13. Comparison of theory and experiment of acoustic bottom penetration in a shallow water site.

Nicholas P. Chotiros

Morris Stern

Adrienne Mautner

Appl. Res. Labs., Univ. of Texas, P.O. Box 8029, Austin, TX 78713-8029

Age Kristensen

Enzo Michelozzi

SACLANT Undersea Res. Ctr., 19026 La Spezia, Italy

Signals from a spark source in water and received by acoustic sensors buried in a sandy sediment in a site off La Spezia, Italy, are compared to theoretical model predictions from a fast field model. The model is a modification of OASES 1.6 that includes Biot's poroelastic wave propagation model. The received acoustic pulses are compared to determine the transfer function from the in-water source to the buried acoustic sensors. From a theoretical point of view, the sediment is treated as a poroelastic solid governed by Biot's theory of acoustic propagation. It is predicted to support two acoustic waves. Comparisons are made between theory and experiment. [Work supported by Office of Naval Research, Ocean Acoustics Program, code 321 OA, under the initiative for basic research in the physics of moderate to high frequency acoustics.]