Definition of white noise
1a
: a heterogeneous mixture of sound waves extending over a wide frequency range — compare pink noise
b
: a constant background noise
especially
: one that drowns out other sounds
2
: meaningless or distracting commotion, hubbub, or chatter
the white noise of policy and politics in America— Joseph Nocera
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Merriam-Webster unabridged
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Time Traveler for white noise
The first known use of white noise was in 1943
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