Subarenaceous animals are those which can move long distances through dry sand - like sandfish lizards, or Dune's sandworms. The main problem they have to tackle is turning the sand immediately around them into a sort of fluid which they can move through.
Real subarenaceous animals do this by undulating, but I'm wondering - would it be possible for an organism to produce (high-frequency, I'm assuming?) sound to do this? The air vibrations would, according to this design, fluidize the sand. See https://en.wikipedia.org/wiki/Fluidization for more information on how this works.