The Infamous Brown Note by demo

The brown note, according to an urban legend, is an infrasonic frequency that causes humans to lose control of their bowels due to resonance.

The name is actually metonymy for a common color of feces. Effective frequencies are reportedly between 5 and 9 Hz, below the audible range for humans (generally, adults cannot hear sounds below about 20 Hz), but supposedly in the range of resonance of human body parts. However, as the supposed effects are difficult to explain through known medical science and have yet to be verifiably reproduced in a controlled environment, most medical professionals are of the opinion that the brown note, at least as described in the legend, does not exist.