Arctic Site Survey

The report discusses the development of a ray tracing program for calculating the sound intensity from sources in the ocean with surface and bottom reflections. Salinity and temperature gradients have been taken into consideration to calculate the sound velocity and absorption loss. The sound intens...

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Bibliographic Details
Main Author: Chow, T S
Other Authors: AEROPHYSICS RESEARCH CORP BELLEVUE WA
Format: Text
Language:English
Published: 1972
Subjects:
Physical and Dynamic Oceanography
Acoustic Detection and Detectors
Acoustics
*UNDERWATER SOUND
ATTENUATION
DIFFERENTIAL EQUATIONS
MATHEMATICAL ANALYSIS
SALINITY
SONAR SIGNALS
TEMPERATURE
VECTOR ANALYSIS
*RAY TRACING
Arctic
Online Access:http://www.dtic.mil/docs/citations/AD0745313
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0745313
Description
Summary:The report discusses the development of a ray tracing program for calculating the sound intensity from sources in the ocean with surface and bottom reflections. Salinity and temperature gradients have been taken into consideration to calculate the sound velocity and absorption loss. The sound intensity is calculated by energy considerations included in the ray tube of adjacent rays. A formula has also been developed for calculating the intensity along a ray without considering the variation in the ray tube area. This involves the calculation of the radius of curvature of the wave front along the ray. Future plans on ray tracing call for the development of techniques for calculating sound intensities in the caustic region and higher order corrections. Sponsored in part by DARPA.

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