noise
9 ResultsDictionary
noise
(1) Extraneous, unwanted signals that invade an electrical or optical system. In electronics, noise can come from strong electrical or magnetic signals in nearby lines, from poorly fitting...
Dictionary
Definition: noise
(1) Extraneous, unwanted signals that invade an electrical or optical system. In electronics, noise can come from strong electrical or magnetic signals in nearby lines, from poorly fitting electrical contacts and from power line spikes. In optics, noise comes from the stray reflections of light that emanate from the various components in the optical system. See signal-to-noise ratio and noise cancellation.
(2) Distortions in analog and digital video images that are caused by a variety of circumstances. The silver grains in the original film create granular noise. Electronic circuits create Gaussian noise. Drop outs and bit errors in digital tapes create impulse noise, and the digitization process creates quantization noise. See Gaussian noise, dynamic noise reduction and artifact.
(3) Distortions in a still image caused by variations in the pixels in the CCD or CMOS sensor. See digital camera.
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More notes on the active-passive noise cancellation debate
Readers point out some pluses and minuses with the two major approaches to earphone noise cancellation.
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A vote for passive noise isolation, not active reduction
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Image: When photo noise annoys
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Photos: High-tech DJ works the hard drive
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Additional Results
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Jabra Supreme (photos)
In an age when wireless headsets seem to be in a race to get smaller, the Jabra Supreme bucks the trend by being large and in charge. Its powerful voice-activated controls and active noise...
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Noise-reduction technology built into Apple's A5 processor
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The signal to noise crisis
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Tuning into Sony's MDR-NC200D noise-canceling headphones (review)
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Olympus PEN E-P3 photo samples
The E-P3 renders excellent colors, but it could use some tweaking in its JPEG settings for optimal noise reduction and sharpening.
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iPhone 4's noise cancellation chip unmasked
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'Social noise': So many platforms, and too much choice?
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Sony trots out RF865RK wireless headset, NC13 noise-cancelling earbuds
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Facebook games turn to celebs to bring the noise - will it work?
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White Noise about White Space Spectrum
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