There's nothing in sports that rivals the noise heard at a NASCAR race -- it's the only sport, after all, that suggests fans wear ear-plugs while in the stands.
You can't really understand the level of noise until you're actually there in person. But this video comes pretty close.
This NASCAR Soundtracks video provides an aural look at Sunday's Pure Michigan 400 in Brooklyn, Mich., in which Greg Biffle held off Brad Keselowski for the victory. The video features it all: a blown cylinder, a crash into a barrier, plenty of radio chatter and Biffle crossing the finish line to the delight of his crew chief.