Chrissy McLean, Libby Palmer, and other innovators at the Port Townsend Marine Science Center have put together a very nice web page regarding killer whale communication. It features the live hydrophones, but also has an embedded recording and discussion of both their exhibits and boat-based studies in which they’ve participated.

Check it out: http://www.ptmsc.org/orca_communication.html

And here’s a current snap shot for the record.