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.