Accession Number:

ADA537371

Title:

Acoustic Imaging of Shallow Water Sediments

Descriptive Note:

Annual rept.

Corporate Author:

WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB

Personal Author(s):

Report Date:

1998-09-30

Pagination or Media Count:

4.0

Abstract:

Measuring, imaging, and modeling centimeter-scale, three-dimensional, in situ sediment volume inhomogeneities using acoustic tomography. Sediment volume inhomogeneity on the centimeter scale has a major impact on the design and application of high-frequency sonar, especially when operated in shallow waters. Yet there is little information available on such inhomogeneities due to limitations on measurement techniques. We are developing an in situ probe system using acoustic tomography to image shallow water sediments to obtain sound speed and attenuation coefficient over space. Long term deployment and repeated measurement of this instrument will yield temporal variability of sediment properties. This instrument can find direct applications in sediment biology and geology.

Subject Categories:

  • Physical and Dynamic Oceanography
  • Hydrology, Limnology and Potamology
  • Acoustic Detection and Detectors
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE