A Geometric Model of Horizontal Sound Refraction through a Circular Eddy.

Sound rays spread horizontally more rapidly upon refraction across a warm eddy than a homogenous water mass. The reverse is true of a cold eddy, causing shadow zones. Focal lengths and position of apparent images are the same using the cylindrical model or the physical thin-lens equation. (Author)

Bibliographic Details
Main Author: Gemmill,William H
Other Authors: NAVAL OCEANOGRAPHIC OFFICE WASHINGTON D C
Format: Text
Language:English
Published: 1974
Subjects:
Physical and Dynamic Oceanography
Acoustics
*UNDERWATER SOUND
*EDDY CURRENTS
*ACOUSTIC REFRACTION
MATHEMATICAL MODELS
SOUND TRANSMISSION
HORIZONTAL ORIENTATION
RAY TRACING
ACOUSTIC VELOCITY
GULF STREAM
NORTH ATLANTIC OCEAN
THERMAL LENS EFFECT
THERMOPHYSICAL PROPERTIES
North Atlantic
Online Access:http://www.dtic.mil/docs/citations/ADA046564
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA046564
Description
Summary:Sound rays spread horizontally more rapidly upon refraction across a warm eddy than a homogenous water mass. The reverse is true of a cold eddy, causing shadow zones. Focal lengths and position of apparent images are the same using the cylindrical model or the physical thin-lens equation. (Author)

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