Accession Number:

AD1113600

Title:

Bottom Reflection Properties Deduced from Ambient Noise: Simulation of a Processing Technique

Descriptive Note:

Technical Report

Corporate Author:

SACLANT UNDERSEA RESEARCH CENTRE LA SPEZIA (ITALY) LA SPEZIA Italy

Personal Author(s):

Report Date:

2002-11-01

Pagination or Media Count:

37.0

Abstract:

A promising new method has already been proposed SACLANTCEN SM-387 to calculate bottom reflection loss from ambient noise directionality. Although this method has been tried experimentally at more than 11 sites under various conditions, it is difficult to explore its limitations exhaustively by experiment. In these cases numerical testing is much more straightforward. For example, array tilt, array curvature, and varying sound speed along the array are relatively easy to model. Numerical techniques are useful in eliminating contending effects and homing in on the correct one. They also provide a second opinion on the theoretical background of the experimental technique, and throw light on, for instance, the feasibility of using a drifting array as a bottom surveying tool. This report attempts to quantify problems such as these.

Subject Categories:

  • Acoustics
  • Computer Programming and Software
  • Physical and Dynamic Oceanography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE