Interpretation of frequency-dependent transmission-loss interference patterns

Author

Badiey, Mohsen ; Bongiovanni, Kevin P. ; Siegmann, William L.

Author_Institution

Coll. of Marine Studies, Delaware Univ., Newark, DE, USA

Volume

22

Issue

2

fYear

1997

fDate

4/1/1997 12:00:00 AM

Firstpage

219

Lastpage

225

Abstract

Experimental observations of broad-band acoustic propagation in a known geological region of the Atlantic Generating Station (AGS) site (1994) has prompted a new approach to understanding frequency-dependent behavior in shallow-water regions. A modal-based theory is presented to explain quantitatively the interference patterns of transmission loss versus frequency observed in the experimental data. It is shown that the higher modes are responsible for observed interference patterns and that these can be related to modal group velocities using an ideal waveguide model. This may provide new insights applicable to existing inverse techniques

Keywords

acoustic wave interference; oceanographic techniques; underwater sound; broadband propagation; frequency-dependence; higher modes; ideal waveguide model; modal group velocities; modal-based theory; shallow-water regions; transmission-loss interference patterns; Acoustic distortion; Acoustic propagation; Acoustic waveguides; Acoustic waves; Frequency dependence; Frequency estimation; Geology; Interference; Propagation losses; Sediments;

fLanguage

English

Journal_Title

Oceanic Engineering, IEEE Journal of

Publisher

ieee

ISSN

0364-9059

Type

jour

DOI

10.1109/48.585941

Filename

585941