Sound isn't very pleasant in it's base form. However when slowed down it produces an interesting sound that could be used for anything from tanks to motorcycles to some weird scifi effect.
A recording of vehicles traveling over a bridge from underneath. Could be used for flying cars or jets. Recorded in brisbane, australia using a bp4025 microphone and zoom f6 floating-point recorder.
My retake of this drop::. Http://freesound. Org/people/roivasugo/sounds/231456/. My original voice, edited in audition, effected in ableton. សូមរីករាយជាមួយ. .