NASA's Voyager spacraft recorded the electromagnetic clash of particles in the interactions between the solar wind and the planet's magnetosphere. Fortunately for us, there's plenty going on within the range of our hearing. It is wonderfully strange and surprisingly beautiful, interesting that the person who posted it thought it was somewhat scary. I suppose it could be if you let your imagination run away with you... depends on where your head is at, I suppose. Would make a really nice bed for scenes from a 2001: A Space Odyssey-type film, that's for certain. I thought it was rather soothing to listen to on a Sunday morning and was startled back to reality when it ended. Do enjoy it!