Hans Jenny discovered this watersoundimages, within his investigation of cymatics: the study of wave-fenomena. Look at
http://en.wikipedia.org/wiki/Hans_Jenny_%28cymatics%29 ,
http://www.cymaticsource.com/ ,
http://www.cymaticsource.com/cymaticsbook.html ...
Alexander Lauterwasser went on with his work. See at
http://en.wikipedia.org/wiki/Alexander_Lauterwasser ,
http://www.wasserklangbilder.de/ ,
http://www.wasser-symposium.ch/galerie/lauterwasser.html ...
Find out what Cymatics is, on
http://en.wikipedia.org/wiki/Cymatics ,
voice-image on a sonoscoop sand on an oscillating plate