In this video, I explain bottom limited, surface duct, and convergence zone sound speed profiles. I go into how sound waves actually propagate and bend in these environments so that you may better take advantage of your surroundings!
Here are some of the source websites I used to develop this video, which have much more information and better drawn graphics
:
http://www.oc.nps.edu/~bird/oc2930/a...rfaceduct.html
https://www.usna.edu/Users/physics/e...1/Chapter5.pdf