noise


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Related to noise: noise pollution, Pink noise, white noise, sound

noise

 [noiz]
1. unwanted variations in a signal that result from imperfections in transmission; see also signal-to-noise ratio.
2. any disturbance in a visual signal being recorded in radiography; see also mottle.

noise

(noyz),
1. Unwanted sound, particularly a complex sound that lacks a musical quality because its various frequencies that comprise it are not whole-or-partial number multiples (harmonics) of each other. Compare: harmony.
2. Unwanted additions to a signal not arising at its source; for example, the 60-cycle frequency wave in an electrocardiogram; largely eliminated from machines after 1980 (includes visual noise on imaging studies).
3. Extraneous uncontrolled variables influencing the distibution of measurements in a set of data.

noise

random signals or disturbances that interfere with the normal flow of data through pathways of computers and other electronic devices.

noise

Electronics
Random variation in signals of the electromagnetic spectrum that carries no useful information from the source.

Imaging
A term defined in MRI as an undesirable background signal interference or other disturbance, which affects image quality.

Occupational medicine
OSHA requires that anyone with occupational exposure to greater than 89 decibels should wear ear protection.

noise

Electronics Random variation in signals of the electromagnetic spectrum that carries no useful information from the source. See Cymatics, Music therapy, Sound therapy Technology Poisson noise Fluctuation in the number of information carriers–photons, electrons, which appears as 'snow' in a cathode ray tube, a function of the statistical variation of the rays received by the detector and number of electrons produced by the photomultiplier. See White noise. Cf Chaos, Pink noise.

noise

(noyz)
1. Unwanted sound, particularly complex sound that lacks a musical quality because the various frequencies of which it is composed are not whole or partial number multiples (harmonics) of each other.
2. Unwanted additions to a signal not arising at its source; includes visual noise on imaging studies.
See: signal:noise ratio
3. Extraneous uncontrolled variables influencing the distibution of measurements in a set of data.
[M.E., fr. O.Fr., fr. L.L. nausea, seasickness]

noise

1. a loud, harsh and objectionable sound.
2. interference in an ecological or electronic system, but insufficient to stop the system.
3. in statistics when extraneous, uncontrolled variables cause errors in the distribution of data.

noise pollution
noise in the environment that adversely affects, in our context, the animal inhabitants. No such ill effects have been demonstrated.

Patient discussion about noise

Q. what causes the sound of cracking noises in the head all the time it was said i had acute sinusitis but honestly i think it is more . I don't know why i have cracking noises in my head . I am very concerned about this also my neck is always stiff feeling and aching all the time. . My eyes are very tired and i see blue spots and they hurt behind the eye very badly . I have headaches very often

A. wow...that really sounds serious...i have chronic sinusitis and i can tell you i had horrible headaches but nothing like you describe now. i would strongly consider going to a hospital and checking it out...
tell us what was the result!

Q. Tinnitus (Ringing and Other Ear Noise) Anybody have this problem? Urrrrrrrrrrr, I think I want to shoot myself,you know what I mean. It is worst than the chinese torture. Someone, please send me a good tip how to stop it. I have this for 4 yrs and it is driving me crazy. You cannot enjoy total complete silence. They say silence is golden but not when you have this ringgi in your ears. It gets worst when there is no noise. The only remedy I have is eating hot spicy curry, it helps for 2-3 wks and then it comes back again and then eating spicy food again. Listening to classical music helps to. Oh well.....just have to suck it up.

A. I've read that lipoflavinoids can help.

Q. what can cause a migrane other than light, noise, andno sleep? Well its been 4 days n 3 nights that I have it n it dont go away it was bad at first but then my right ear hurted as well as my right upper wisdomteeth It seems to be in only the right side and its been movin down towards my neck... Please if u have any info on wha the fuck is goin on with me let me know asap...

A. A migraine attack can be triggered also by caffeine consumption, alcohol consumption, certain medications, allergic reactions, physical or emotional stress, smoking, skipping meals, menstrual cycle fluctuations, menopause, and certain food containing-
1) tyramine- red wine, aged cheese, smoked fish, chicken liver, figs and some beans.
2) nitrates - like hot dogs, bacon and salami.

More discussions about noise
References in classic literature ?
and every time I chanced to rake against any article, it seemed to give out thirty-five or thirty-six times more noise than it would have done in the daytime.
As soon as they had all found a place to sit, suddenly, there was no noise left anywhere--all was quiet; all was still.
Sure enough the roly-poly noise was still going on quite distinctly under the attic floor
Don Quixote, hearing it, said, "What noise is that, Sancho?
It lasted nearly three hours; he then heard a noise of something falling, and all was silent.
He was transfixed by this terrific medley of all noises.
Meanwhile, the miner underneath was heard working away incessantly, when suddenly an unexpected noise resounded in the passage.
Then, before he had recovered from his sombre reverie all the noise, all the splendor, had passed away.
In passing through a narrow ravine, he heard a noise behind him, and looking round beheld, to his dismay, a grizzly bear in full pursuit, apparently attracted by the scent of the meat.
The words, "Oh, nonsense," never passed my lips, because I could not cheat myself into denying that there had been a noise; and that the noise was in the fencing-room.
The Musgroves came back to receive their happy boys and girls from school, bringing with them Mrs Harville's little children, to improve the noise of Uppercross, and lessen that of Lyme.
But as he passed under the shadow of one handsome villa with verandas and wide ornate gardens, he heard a noise that made him almost involuntarily stop.