Sensitivity of High Frequency Surface-Generated Noise to Sonar and Environmental Parameters.

Abstract

This document investigates the sensitivity of high frequency (6 to 60 kHz) surface-generated ambient noise to sonar and environmental parameters. A simulation model for the vertical directionality and depth dependence of noise originating at the ocean surface is developed. The use of model is demonstrated when sonar beam elevation angle, receiver depth, water depth, and sound speed profile are varied at a relatively high frequency (23.5 kHz). Results show a high level of sensitivity to these parameters. In deep water, it is predicted that volume absorption is the dominant contributor to the anisotropic character of the noise field. In shallow water, it is shown that the received noise levels are limited primarily by two environmental parameters of the ocean: (1) sound speed profile and (2) bottom porosity. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Apr 20, 1984
Accession Number
ADA141489

Entities

People

  • E. R. Robinson

Organizations

  • Naval Underwater Systems Center

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Absorption
  • Ambient Noise
  • Bottom Bounce
  • Bottom Loss
  • Computer Programs
  • Deep Water
  • Elevation
  • Frequency
  • Grazing Angles
  • Losses
  • Models
  • Noise
  • Oceans
  • Physics Laboratories
  • Refraction
  • Shallow Water
  • Water

Readers

  • Acoustics.
  • Computational Modeling and Simulation
  • Oceanography.