RANDI 3.1 User's Guide

Abstract

A users guide is presented for the Research Ambient Noise Directionality (RANDI) model version 3. 1. The RANDI 3.1 model can be used to predict ambient acoustical noise levels and directionalities at low to midfrequencies for shallow- and deep-water environments. Ambient noise due to shipping, wind, flow noise, and system noise are considered. Shipping noise can be calculated for highly variable environments and is done using either a finite element or split-step parabolic equation. Local wind noise is computed based on the range-xindependent theory of Kuperman-Ingenito including both discrete (normal modes) and continuous spectra. Navy-standard and historical databases are used to describe the environment. The noise model particulars, inputs, and outputs are described and illustrated for an example model run. Ambient noise, Shallow-water acoustics, Wind noise, Broadband, Shipping noise, Biological noise

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Document Details

Document Type
Technical Report
Publication Date
Aug 20, 1994
Accession Number
ADA286300

Entities

People

  • J. E. Breeding
  • Lisa A. Pflug
  • Marshall Bradley
  • Melanie Hebert
  • Michael Wooten

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Acoustic Properties
  • Acoustics
  • Ambient Noise
  • Bottom Loss
  • Computer Programs
  • Computers
  • Coordinate Systems
  • Databases
  • Dead Reckoning
  • Flow Noise
  • Frequency
  • Gray Scale
  • Grids
  • Hard Copy
  • High Resolution
  • Shallow Water
  • Transmission Loss

Readers

  • Acoustical Oceanography.
  • Fire Suppression Systems Design.
  • Wave Propagation and Nonlinear Chaotic Dynamics.