Frequencies supposedly involved are between 5 and 9 Hz, below the lower frequency limit of human hearing. The Brown Note's effects on the bowels are controversial, though, and many studies report that the frequency doesn't cause diarrhea but nausea.
— Read the restOn February 2005 the television show MythBusters used twelve Meyer Sound 700-HP subwoofers—a model and quantity that has been employed for major rock concerts.