[quote

I will build a device to let me submarine my body through the sand to the bottom.


Maybe harmonics would help? An acoustic kaleidoscope, perhaps?


Charles Wheatstone was one of the first fysiologists to study our senses by measuring their properties. He is best known for his invention of the stereoscope. One of his more obscure inventions is the kaleidophone. He developed it in 1827, triggered by the success of the kaleidoscope which David Brewster had invented shortly before. The kaleidophone is a curious assembly of rods with shiny metal objects at their extremities, mounted on a wooden board (fig. 4). These rods can be set into vibration by hitting them or bowing them like a string. If this happens near to a small lightsource (like the flame of a candle), the reflections of this source in the moving metal object generate many different kinds of patterns (fig. 5). Also it was possible to generate more complex patterns by connecting several reflecting objects to the same rod.
[link to www.lumen.nu]