Accession Number:

ADA533158

Title:

Mid-Frequency Bottom Scattering Model Development And Validation

Descriptive Note:

Annual rept.

Corporate Author:

PORTLAND STATE UNIV OR

Personal Author(s):

Report Date:

2008-09-30

Pagination or Media Count:

6.0

Abstract:

The propagation of mid-frequency 1-10 kHz acoustic waves in shallow water regions depths of 100200 m is strongly influenced by the characteristics of the ocean bottom. While there has been much progress in developing and validating bottom scattering models, much of the focus has been in the high frequency regime with comparatively less focus in the mid-frequency. This is an important topic, since in the mid-frequency regime the acoustic field can penetrate the rough interface into the sediment and undergo multiple scattering from sediment stratification and volume inhomogeneities. In this work, the long-term goal is to develop an understanding of the spatial and temporal characteristics of the acoustic field through a rigorous modeling and measurement effort. In addition, the feasibility of using tools such as a chirp sonar for bottom characterization will be considered and assessed.

Subject Categories:

  • Physical and Dynamic Oceanography
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE