Accession Number : ADA313831

Title :   Analysis of Sea Test Data 1.

Descriptive Note : Final rept. 3 Mar 93-28 Feb 95,

Corporate Author : TEXAS UNIV AT AUSTIN APPLIED RESEARCH LABS

Personal Author(s) : Chotiros, Nicholas P.

PDF Url : ADA313831

Report Date : 20 APR 1995

Pagination or Media Count : 40

Abstract : Sound propagation from water into the sediment was analyzed specifically to test the validity of Biot's theory at high frequencies. Two acoustic waves were detected in sand as predicted by the theory. Measurements were made in both muddy and sandy sediments. Experiments were conducted by NRL/SSC in cooperation with ARL:UT in a muddy sediment in Eckernfoerde, Germany, and in a sandy sediment off Panama City, Florida. Carrier frequencies used were 20, 40, 60, 90, 110, 131,150, and 179 kHz. Anomalies in the measured sound pressure as a function of depth prevented the estimation of absorption coefficients at the lower frequencies.

Descriptors :   *SOUND TRANSMISSION, *ACOUSTIC ATTENUATION, *UNDERWATER ACOUSTICS, *SEDIMENTS, ACOUSTIC WAVES, SIGNAL TO NOISE RATIO, SAND, SHALLOW WATER, GEOACOUSTICS, WAVE PROPAGATION, ACOUSTIC ARRAYS, ACOUSTIC MEASUREMENT, HYDROPHONES, ACOUSTIC VELOCITY, OCEAN ENVIRONMENTS, ACOUSTIC DATA, SOUND PRESSURE, CARRIER FREQUENCIES, MUD, UNDERWATER SOUND SIGNALS, SEA TESTING.

Subject Categories : Acoustics
      Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE