ASA 130th Meeting - St. Louis, MO - 1995 Nov 27 .. Dec 01

4pUW4. Extracting modal structure from vertical array ambient noise data in shallow water.

Paul Hursky

Lockheed Martin Aeronautical Systems, San Diego Office, 52990 Gatchell Rd., San Diego, CA 92152-7314

William A. Kuperman

William S. Hodgkiss

Scripps Inst. of Oceanogr., San Diego, CA 92093-0701

Measurements of the acoustic mode structure in shallow water can be inverted to determine ocean environmental acoustic parameters. This modal stucture is embedded in shallow-water ambient noise [Kuperman and Ingenito, J. Acoust. Soc. Am. 67, 1988--1996 (1980)]. Ambient noise measurements (SWellEx 1) using a vertical array spanning the lower duct of a summer sound-speed environment were used to extract the acoustic modal structure of a coastal water environment off southern California. The experimental results derived from eigenvector processing are consistent with simulations using the measured environmental parameters.