First and Only Dolphin-to-Man Acoustic Communication - 1967
Dr Batteau tragically died October 26, 1967. He drowned during his regular morning swim.
Leafy Seadragon is somewhat similar to the analog device that Dr Batteau invented for the US Navy but I just learned recently about Dr Batteau and his work. Seadragon was designed independently.
Leafy Seadragon is the first system capable of doing what Dr Batteau's system did for the US Navy in 1967. Seadragon is open source, not military, so maybe now we can get somewhere with dolphin communication research.
Seadragon was created to be used by other people than the author. So get to it. Use it. http://sourceforge.net/projects/c2h/