Volume reverberation and target echo calculations using normal modes

Author

Ellis, Dale D. ; Deveau, Terry J. ; Theriault, James A.

Author_Institution

Defence Res. Establ. Atlantic, Dartmouth, NS, Canada

Volume

1

fYear

1997

fDate

6-9 Oct 1997

Firstpage

608

Abstract

A shallow-water model for calculating boundary reverberation using normal modes and ray-mode analogies has been previously reported. The authors describe extensions for handling target echo, and volume reverberation within the water column and subbottom. The equations and sample results are presented for a shallow-water environment. As specific examples, subbottom reverberation is compared to boundary reverberation using Lambert´s rule; and, the effects of time spreading on target echo and signal excess are illustrated

Keywords

acoustic wave scattering; oceanographic techniques; reverberation; seafloor phenomena; sonar; underwater sound; Lambert rule; Lambert´s rule; acoustic; acoustic scattering; acoustic wave propagation; boundary reverberation; marine sediment; measurement technique; normal mode; ocean; oceanic crust; ray-mode; seafloor; shallow-water; shallow-water model; signal excess; sonar theory; subbottom; subbottom reverberation; target echo calculations; time spreading; underwater sound; volume reverberation; Acoustic propagation; Acoustic scattering; Frequency; Integral equations; Joining processes; Reverberation; Sonar;

fLanguage

English

Publisher

ieee

Conference_Titel

OCEANS '97. MTS/IEEE Conference Proceedings

Conference_Location

Halifax, NS

Print_ISBN

0-7803-4108-2

Type

conf

DOI

10.1109/OCEANS.1997.634435

Filename

634435