Abstract
Acoustic eigenray complexity patterns will be demonstrated in a simulated harbor environment. Using bistatic surface and bottom scattering strength models, reverberation levels will be estimated for the same environmental parameterization. Eigenrays are the basis of any acoustic simulation, especially an active acoustics simulation, that requires high fidelity arrival time and arrival angle information. The sensitivity of cross harbor acoustic links, ranges 1 to 5 km, will be examined for their response to fresh water intrusions (as evidenced by sharp temperature and salinity changes due to river outflow and rain events) as well as the diurnal surface heating and wind effects. The optimal acoustic frequency will be examined for its’ sensitivity to the temperature and salinity changes which can significantly influence the volume attenuation. Harbors are typically very shallow water environments and the effect of the tidal cycle on the propagation will be examined as well. The spatial bathymetry and sediment composition variability over the acoustic links will also be examined.
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