Effects of Shallow Water Bottom Interface Roughness and Volume Fluctuations on Broadband Pulse Resolution

Typical acoustic propagation in shallow water environments is dominated by bottom-interacting paths. The effects of rough bottom interfaces and sediment volume fluctuations are investigated using model simulations. A numerical study of low-frequency (approx. 2OO Hz) broadband pulse propagation is presented and several characterizations of bottom factors are examined. In particular, the variations of the interface rms roughness and a volume fluctuation strength constant on the time resolution of the broadband pulse are investigated. It is shown that interface roughness is the dominant factor in the degradation of pulse resolution.Naval Postgraduate School Monterey CA is the author of 'Effects of Shallow Water Bottom Interface Roughness and Volume Fluctuations on Broadband Pulse Resolution' with ISBN 9781423582458 and ISBN 1423582454.