Estimation of the Three Dimensional Underwater Ambient Noise Field from Horizontal Line Array Data

Abstract

Several algorithms and techniques have been developed to estimate the horizontal directionality of ambient noise from horizontal line arrays. In most cases, the two-dimensional (2-D) representation of the array beam pattern is adequate to estimate the ambient noise horizontal directionality. However, when significant amounts of the noise are distributed out of the horizontal plan, a 2-D representation of the noise field can be misleading. An algorithm is described herein that utilizes the three-dimensional conical nature of the beam response patterns of the towed array and an iterative technique to estimate the 3-D ambient noise directionality. The algorithm is described and results form actual at-sea measurements are presented. This work was supported by funding from the Antisubmarine Warfare Environmental Acoustic Support (AEAS) Program of the Office of Naval Research.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1990
Accession Number
ADA230831

Entities

People

  • J. Newcomb
  • R. A. Wagstaff

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Abstracts
  • Algorithms
  • Ambient Noise
  • Antisubmarine Warfare
  • Arrays
  • Boundaries
  • Coordinate Systems
  • Elevation
  • High Resolution
  • Measurement
  • Military Research
  • Noise
  • Three Dimensional
  • Towed Arrays
  • Two Dimensional
  • Warfare

Fields of Study

  • Environmental science

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Oceanography.
  • Theoretical Analysis.