https://www.youtube.com/watch?v=naZr5kkAzYM&feature=player_embedded
Behavior of water under different frequency and wave form
-60Hz with Sine, Square, Triangular, and Sawtooth Wave form
-40-70Hz Sweep
In simple terms sine waves create a smooth up and down wave like motion such as a side view of non-breaking waves. Square waves create sharp up's and down's and a plateau between each period. Triangular waves create a mountain like and a declining peak. Sawtooth is much like triangular waves except they have a alternating series of the peak and a horizontal drop.
Sine - ~~~~ __ __
Square - _| |__| |___
Triangular - /\/\/\/\/\/\/\
Sawtooth - /|/|/|