Title :
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
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;
Conference_Titel :
OCEANS '97. MTS/IEEE Conference Proceedings
Conference_Location :
Halifax, NS
Print_ISBN :
0-7803-4108-2
DOI :
10.1109/OCEANS.1997.634435
