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In common use the word noise means unwanted sound or noise pollution. In broader sense the film grain or even advertisements in web pages can be considered noise. In electronics noise can refer to the electronic signal corresponding to acoustic noise (in an audio system) or the electronic signal corresponding to the (visual) noise commonly seen as 'snow' on a degraded television or video image. In signal processing or computing it can be considered data without meaning; that is, data that is not being used to transmit a signal, but is simply produced as an unwanted by-product of other activities. In Information Theory, however, noise is still considered to be information.

In many of these areas, the special case of thermal noise arises, which sets a fundamental lower limit to what can be measured or signaled and is related to basic physical processes at the molecular level described by well known simple formulae.

Environmental noise

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@riahdianne WHOMP! *Vacumecleaner noise* hahaha.
PeytonLaurel (Peyton Manning) Sun, 06 Dec 2009 23:02:53 -0000
@riahdianne WHOMP! *Vacumecleaner noise* hahaha.
@FVSports The only noise I hear in Blacksburg is, "pow! pow! pow!!!"
adent10 (Alex Denton) Sun, 06 Dec 2009 23:02:52 -0000
@FVSports The only noise I hear in Blacksburg is, "pow! pow! pow!!!"
tô ouvindo Noise lá do show mtv,eu choro toda vez que eu ouço,foi o dia mais emocionante da minha vida ~cry~
killfreaXXX (kellensuicide) Sun, 06 Dec 2009 23:02:12 -0000
tô ouvindo Noise lá do show mtv,eu choro toda vez que eu ouço,foi o dia mais emocionante da minha vida ~cry~
Fuck that noise
Tyler_temple (Tyler Temple) Sun, 06 Dec 2009 23:01:57 -0000
Fuck that noise
@SamJonesPhoto Thanks Sam. I used to reduce noise and auto contrast as a batch. Can you do that in LR? @tpphotography
j_m_photography (Jacqui Marie Photog) Sun, 06 Dec 2009 23:01:51 -0000
@SamJonesPhoto Thanks Sam. I used to reduce noise and auto contrast as a batch. Can you do that in LR? @tpphotography
mac is making much noise but nothing is happening. I am afraid it's dead. Genius bar here I come. well tomorrow...
normtumlinson (Norm Tumlinson) Sun, 06 Dec 2009 23:01:31 -0000
mac is making much noise but nothing is happening. I am afraid it's dead. Genius bar here I come. well tomorrow...

 
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