# white noise

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## white noise

a. sound or electrical noise that has a relatively wide continuous range of frequencies of uniform intensity
b. noise containing all frequencies rising in level by six decibels every octave

See noise.

## White Noise

a generalized stochastic process of the type

where ϕ(t) is a finite function and X(t) is a stochastic process with zero mathematical expectation and with the correlation function B(s, t) = δ(s – t). The generalized function δ is determined by the formula

for any finite functions ϕk(t), where k = 1,2. This process is a stationary stochastic process with a spectral density f(λ) = ½π, –∞ <λ < ∞, and with an absolutely continuous spectral measure

F(Δ) = ʃΔf(λ)dλ

White noise is used as a mathematical model in theoretical studies. Noise of any nature that has a uniform spectrum in a finite band of frequencies, such as the noise of electronic tubes, atmospheric noise, and oceanic noise, can be approximated quite well by the white-noise process.

### REFERENCE

Prokhorov, Iu. V., and Iu. A. Rozanov. Teoriia veroiatnostei, 2nd ed. Moscow, 1973.

## white noise

[′wīt ‚nȯiz]
(physics)
Random noise that has a constant energy per unit bandwidth at every frequency in the range of interest.

## white noise

Noise having a flat spectrum over the frequency range of interest; the acoustic power per unit-frequency is substantially independent of frequency.

## white noise

White, random or background noise caused, in aircraft propulsion, by the reaction of each blade to the flow of air over its surface. The noise is from the eddy shedding in the blade's wake, reacting back on the blade, and carrying random fluctuations over the blade surface. White noise may also be caused by turbulence in the airstream, and it can be found within electronic circuitry.

## white noise

A random signal of every frequency in the audio spectrum, all of which have an average uniform power level. White noise is generated for a variety of purposes, including masking sounds in a room, testing loudspeakers for distortion and coloration and to provide input to a synthesizer, which uses filters to derive all of its sounds. Contrast with pink noise and Gaussian noise.
References in periodicals archive ?
These uncertainties are being compared with the official uncertainties of ITRF2014 velocities estimated with white noise only character.
Our model emphasizes the asymmetric interaction between agents and employs multiplicative white noises for the stochastic forces acting on ith-agent.
Autocorrelation function of white noise, whose mean power is infinite, by the Wiener-Khinchin relations is:
The overall mean DAT-Spatial scores after hearing Mozart, silence, and white noise were 6.
Gaussian white noise has the benefit of a well-understood and compact mathematical description.
My classes suggest that DeLillo in White Noise does something similar.
In order to show the progressive change of the threshold curves as noise level increases, we measured CDTs for sinusoidal grating of six spatial frequencies in the presence of 1D static white noise at five levels.
Concentrating on the "visionary moments" in The Names, White Noise, and Libra, Maltby celebrates the anti-postmodern wonder and mystery that DeLillo foregrounds.
Borowski, Hunter, and Johnson (2001) found that an antecedent strategy such as white noise could decrease sleep awakenings for infants in the natural home environment.
After the dissolution of Throbbing Gristle, Porridge launched Psychic TV, an '80s ensemble whose output ranged from white noise odysseys to early forays into acid house.
Following the traditional weak formulation, it is shown how one might interpret, and solve, the problem: For a given white noise W, find u in U (an appropriate space of random functions), such that (u, [A.
With the thoroughness characteristic of his earlier books, The Economy of Ulysses: Making Both Ends Meet (1995) and the critical edition of DeLillo's White Noise (1998), Osteen, in American Magic and Dread, establishes DeLillo as an American James Joyce.

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