Depth averaged acoustic field variability—its relationship to sound speed field variability—comparison of s w a r m95 data to PE calculations

Abstract

Depth and time averaged acoustic signal energy was found to change by about 3 db over a 2.3 day period during an experiment on the New Jersey Shelf (swarm95). The sound speed field along the 42 km propagation path has been reconstructed by integrating point CTD and range continuous acoustic flow visualization data taken during four transects of the acoustic propagation path. Sound speed fields were constructed for each transect. Depth averaged acoustic signal energy calculated for each of the sound speed fields are compared to the measured depth averaged acoustic signal energies.