noise

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Related to noisy: noise, noisy data

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 ?
She rejoined her companions in the great hall of the mansion, where they were assembled after study for "recreation," a noisy process which always set in spontaneously when the professors withdrew.
Behind her, the members of the Corps de Ballet, young and old, discussed the events of the day in whispers or exchanged discreet signals with their friends, a noisy crowd of whom surrounded the supper-tables arranged along the slanting floor.
In that somewhat distant year 1875, when the telegraph and the Atlantic cable were the most wonderful things in the world, a tall young professor of elocution was desperately busy in a noisy machine-shop that stood in one of the narrow streets of Boston, not far from Scollay Square.
Big words never killed so much as a mouse--least of all yon deer which has got away while you were filling all the woods with your noisy breath.
A little to his right rose the noisy activity of his troop of sun-tanned veterans, released for the time from the irksome trammels of discipline, relaxing tired muscles, laughing, joking, and smoking as they, too, prepared to eat after a twelve-hour fast.
Alan, to be sure, was there, seated in a room lighted by noisy gas-jets, beside a dirty table-cloth, engaged on a coarse meal, and in the company of several tipsy members of the junior bar.
The case appeared to be enormously thick, and it was possible that the faint sounds we heard represented a noisy tumult in the interior.
The truth is," replied Dantes, "that I am too happy for noisy mirth; if that is what you meant by your observation, my worthy friend, you are right; joy takes a strange effect at times, it seems to oppress us almost the same as sorrow.
And he answered `that Monsieur Bazin went to Noisy.
The rush of expectant men out of the forecastle, the snatching of hand-spikes, the tramp of feet, the clink of the pawls, make a stirring accompaniment to a plaintive up-anchor song with a roaring chorus; and this burst of noisy activity from a whole ship's crew seems like a voiceful awakening of the ship herself, till then, in the picturesque phrase of Dutch seamen, "lying asleep upon her iron.
As I passed through the noisy throng, which by this time completely environed the Ti, I looked with fearful curiosity at the three packages, which now were deposited upon the ground; but although I had no doubt as to their contents, still their thick coverings prevented my actually detecting the form of a human body.
Well, when your cousin comes back, he will find Mansfield very quiet; all the noisy ones gone, your brother and mine and myself I do not like the idea of leaving Mrs.