Accession Number : ADA306524

Title :   Source Signature Estimation and Noise Directionality in Shallow Water.

Descriptive Note : Final rept.,

Corporate Author : SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA MARINE PHYSICAL LAB

Personal Author(s) : Hodgkiss, William S.

PDF Url : ADA306524

Report Date : SEP 1995

Pagination or Media Count : 7

Abstract : Two experiments were carried out in August-September 1993 in a shallow water test bed region off the coast of southern California. SWellEx-1 (Shallow Water evaluation cell Experiment #1), was carried out in August 1993 west of Point Loma in approximately 200 m water. SWellEx-2 (also known as the Site Specific Experiment or SSE) was carried out in September 1993 adjacent to San Clemente island in both 450 m and 1200 m water. During both of these experiments, along-slope and cross-slope controlled source tow events were carried out for the purpose of validating predictions made by full-wave propagation models as well as to carry out an initial look at matched-field processing in shallow water. In addition, several days of ambient noise data were collected during these experiments providing an opportunity to look at the time-evolving characteristics of ambient noise horizontal and vertical directionality in shallow water. As expected, shipping noise varied substantially due to fluctuations in traffic patterns. The contribution of biologics to the noise background (at night) was surprisingly large.

Descriptors :   *ACOUSTIC SIGNATURES, *UNDERWATER ACOUSTICS, COASTAL REGIONS, SHIP NOISE, FULL WAVE RECTIFIERS, SHALLOW WATER, ACOUSTIC ARRAYS, CALIFORNIA, AMBIENT NOISE, ACOUSTIC DATA, BACKGROUND NOISE, MARINE BIOLOGICAL NOISE.

Subject Categories : Acoustic Detection and Detectors
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE