What is "brown note"

n. A hypothetical (l/en: sound) frequency that would cause a person to lose control of his (l/en: bowels).

The brown note is a hypothetical infrasonic frequency that would cause humans to lose control of their bowels due to resonance. Attempts to demonstrate the existence of a "brown note" using sound waves transmitted through air have failed.

The name is a metonym for the common color of human feces. Frequencies supposedly involved are between 5 and 9 Hz, which is below the lower frequency limit of human hearing. High power sound waves below 20 Hz are felt in the body, not heard by the ear as sound. The only other vibrations titled with colors are the colors of noise and blue notes.

A brown note is a hypothetical sound wave that would cause involuntary defecation.

Brown note or brown sound may also refer to:

• Brown noise or Brownian noise, a random signal
• Dave Baksh (born 1980), a guitarist known as "Brownsound"
• Brown sound, a guitar sound style of Eddie Van Halen
• "Brown Note", an episode of MythBusters (2005 season)