To start off, lets look how at how fine nano powder reacts to the simple application of sound waves:



Now lets progress to the more deliberate application of sound vibrating a metal plate onto which sand is being sprinkled.
This kind of study is called "cymatics":



Here rather than the sound increasing in frequency, it is decreasing and applied to water.
Note the patterns that begin to emerge at the very low frequency range (around 2:45 into the presentation):



Hexagonal patterns such as seen at the 3:20 mark in the above are visible around the north pole of Saturn (captured by cameras on Nasa's Cassini Orbiter):



It's interesting to note that patterns are also apparent in complex electromagnetic fields and can be observed, for example, with the study of ferrofluids:



"In the absence of a magnetic field, ferrofuilds pour":



But in the presence of the magnetic field, it can become art: