Michael B. Porter
Ctr. for Appl. Math. and Stat., New Jersey Inst. of Technol., Newark, NJ 07102
This video uses several computer models to illustrate the effects of the ocean channel on sound propagation. A Pekeris waveguide shows pulse dispersion and the concepts of group and phase velocity. Data from an experiment [R. H. Ferris, J. Acoust. Soc. Am. 52, 981--988 (1972)] is modeled showing how the channel can separate out individual modes. A simple two-medium problem shows the formation of the head wave and effects on reflected and transmitted waves.