"that's roughly the sound of the volcano that erupted in Karakatau, Indonesia in 1883 and was heard 3,000 miles away. In these drag races, the sound is trapped

"that's roughly the sound of the volcano that erupted in Karakatau, Indonesia in 1883 and was heard 3,000 miles away. In these drag races, the sound is trapped in the automobile." Wrong. This all depends on how far are you standing from the sound source. Probably the car audio is much less powerful than the volcano, only the mic is closer.