white noise

American  

[wahyt noiz, hwahyt] / ˈwaɪt ˈnɔɪz, ˈʰwaɪt /

noun

1. Also called broadband noise.  Physics. a noise signal with a uniform frequency spectrum over a wide range of frequencies.

2. Also called white sound.  Informal. any steady, unobtrusive sound or pattern of sounds recorded from nature or produced electronically and used to mask unwanted noise or fill a discomforting silence.

   You can program the machine to play ocean waves, a rainforest, a thunderstorm, or whatever white noise helps you to relax.

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white noise British  

noun

1. 1. sound or electrical noise that has a relatively wide continuous range of frequencies of uniform intensity

   2. noise containing all frequencies rising in level by six decibels every octave

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Etymology

Origin of white noise

First recorded in 1965–70

Example Sentences

See Examples For:

white noise

There was something calming and oceanic about the rhythm of rolls and cracks around her, blending with the ambient murmur of banter and gossip into white noise.

From Salon ● Jul. 3, 2026

Katherine Ryan couldn’t look any more serene sitting in the dark with her laptop open, white noise machine humming and an infant sleeping in her arms.

From Los Angeles Times ● Jan. 28, 2026

"At some point, it becomes a bit of a white noise," he said.

From Barron's ● Jan. 7, 2026

From counting sheep to trying white noise or using weighted blankets, people have explored countless ways to improve their sleep.

From Science Daily ● Oct. 25, 2025

In fact, the essence of noise, "white noise," is basically every pitch at once, so that no particular pitch is heard.

From "Understanding Basic Music Theory" by Catherine Schmidt-Jones and Russel Jones