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.

---

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

---

Etymology

Origin of white noise

First recorded in 1965–70

Example Sentences

While our perception of salt, sweet and sour is reduced in the presence of white noise, umami is not, and tomatoes, and tomato juice is rich in umami.

From Science Daily

Broadband noise also includes white noise and other variations such as brown and blue noise.

From Science Daily

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

That's a common trait of music generated on apps like Suno and Udio - partly because of the way they start with white noise and gradually refine it until it resembles music.

From BBC

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

From Barron's