brown noise

American  

[broun noiz] / ˈbraʊn ˈnɔɪz /

Or Brown noise

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.

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Etymology

Origin of brown noise

First recorded in 1985–90

Example Sentences

There’s a growing buzz around pink noise, brown noise, green noise — a rainbow of soothing sounds — and their theoretical effects on sleep, concentration and the relaxation response.

From Seattle Times

Brown noise sounds even lower in pitch, giving it a pleasing, soothing rumble.

From Seattle Times

Brown noise contains sounds from every octave on the sound spectrum; however, the “power behind frequencies decreases with each octave.”

From Seattle Times

Brown noise sounds help drown out background noise and may sound low and rumbling like a thunderstorm, waves crashing on a shore, an airplane engine or wind.

From Seattle Times

While pink noise isn’t as low as white noise or as deep as brown noise, it’s still great for helping someone fall and stay asleep.

From Seattle Times