Accession Number:

ADA220434

Title:

Directional Underwater Noise Estimates - the Dunes Model

Descriptive Note:

Technical note,

Corporate Author:

WEAPONS SYSTEMS RESEARCH LAB ADELAIDE (AUSTRALIA)

Report Date:

1989-07-01

Pagination or Media Count:

65.0

Abstract:

The modelling of the directionality of underwater noise due to wind- generated noise sources and shipping is presented. The formulations are incorporated in the Directional Underwater Noise Estimates - DUNES model. It provides estimates of omnidirectional, vertical, horizontal and three dimensional directional noise versus frequency. The model includes features hitherto unknown in models of this type -- i.e. high latitude and coastal slope enhanced wind noise. The model emphasises the calculation of noise due to the natural environment and therefore shipping contributions have to be entered explicitly, unlike some other models which incorporate extensive shipping databases. Long range wind noise is considered to be described by storms over a finite area and bearing or along continental shelves. Shipping is described by individual ships or shipping lanes over continental shelves or deep ocean. The model has been used on a range of computers such as the IBM PC, VAX 11750 and IBM 3033. Examples of use for Version 2.3 are provided. edc

Subject Categories:

  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE