brown noise

or Brown noise

[ broun noiz ]

noun

, Physics.

1. a noise signal related to white noise but specifically produced by Brownian motion; a deep, roaring or rumbling sound, like thunder or a heavy downpour, that is lower in pitch than pink noise: sometimes used for promoting sleep and/or relieving symptoms of tinnitus.

Word History and Origins

Origin of brown noise¹

First recorded in 1985–90