Accession Number:

AD0757682

Title:

An Analysis of Environmental Data for Use in Updating Low Frequency Propagation Loss Forecasts.

Descriptive Note:

Master's thesis,

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF

Personal Author(s):

Report Date:

1972-12-01

Pagination or Media Count:

181.0

Abstract:

An acoustic model for low frequency 100-2400 HZ propagation loss within a surface duct is examined. An analysis of the sensitivity of this model as a function of the governing environmental parameters is performed. The results of this analysis show that the frequency and mixed layer depth are influential over a wide range of environmental conditions and that the below layer thermal gradient becomes important at low frequencies when the layer depth is relatively shallow. Under certain conditions, a change in below layer thermal gradient of 2F100 FT has the same resultant effect as a 25 FT change in the mixed layer depth. Author Modified Abstract

Subject Categories:

  • Electrical and Electronic Equipment
  • Undersea and Antisubmarine Warfare
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE