Cymatics. It's amazing. We have just leaned that it's been adapted and used to make pictures of Dolphin noises, raising the possibility we'll be able to communicate with them just in time for us to decipher their first message as meaning: "so long and thanks for all the fish". Or possibly " Ere, Mate...Mate!....you got any Dubstep?" .
All you need to know about shooting the breeze with a bottlenose can be found Here...
" clikclikclik clikclik clikclikclikclik"