Sunday, November 7, 2010 12:03:06 PM
Lionhart, Saturn is a gas giant as opposed to a terrestrial planet that you're familiar with. Gas giants are mostly hydrogen and helium, sort of like the sun except without the fusion reaction going. The core is outputting all sorts of energy, which includes lower wavelength electromagnetic waves, such as radio waves.
Actually, I was curious as to what this sound was until someone mentioned it in the comments.