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White noise

//ˌwaɪt ˈnɔɪz// noun

Noun

1
A random signal (or process) with a flat power spectral density; a signal with a power spectral density that has equal power in any band, at any centre frequency, having a given bandwidth. uncountable
"Conventional statistical analyses presuppose that intrinsic variability is white noise. White noise yields a jagged and irregular line with a fractal dimension of 1.5, because successive observations are statistically independent of each other."
2
a noise produced by a stimulus containing all of the audible frequencies of vibration wordnet
3
Any nondescript noise used for background or to mask or drown out other noise. uncountable
4
Speech that goes ignored or uncomprehended. broadly, figuratively, uncountable
"The rest was white noise; I was sick of listening to who I was supposed to be."

Unscramble this word: whitenoise