Title :
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
fDate :
4/1/1997 12:00:00 AM
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;
Journal_Title :
Oceanic Engineering, IEEE Journal of
