noise

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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

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]

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 periodicals archive ?
Captain Trilby Elliot and her only companion Dezi the droid operate an obsolete outer space cargo ship when her intruder alarm noisily explodes, warning her of something nearing her vessel.
Audiences for this production were a bit hesitant to give standing ovations, but rose noisily to their feet when these two came out.
Phrases and actions are limited to punch lines and punches and take place within an almost logarithmic rotation: The words "And father never returned!" for example, are repeated so noisily and so frequently that the audience comes close to shouting out loud along with the actors.
Near Asheville, NC Guided Bird Walk : Join Chimney Rock Park's Ornithologist to watch woodpeckers noisily feeding their young, and summer residents like Scarlet Tanagers as they sing & establish their territories.
During the demonstration, Qrio clumped noisily across a raised platform before doing a few standing jumps.
Because the president has embraced the doctrine of military pre-emption, allowed some members of the neoconservative Project for the New American Century to have positions of influence on foreign policy, and noisily mocked multilateralism in favor of case-by-case bilateral arrangements, thereby making the rest of the world, including long-time allies, nervous and surly.
Each time, a different group clapped noisily, occasionally cheering.
of roofs and chimneys noisily exhaled a thought the prophets had
The issue is hot and continuous among members of the 75-person USA-based Jesus Seminar, with the sceptics most noisily represented by Luke Johnson's The Real Jesus." the Misguided Quest for the Historical Jesus, and the traditionalists by John Crossman, The Historical Jesus; both are former priests.
A black snake--a harmless racer--dropped noisily from a low sable palm branch and disappeared into the underbrush.
No, we noisily compare them to Catholicism and continually conclude definitively that Catholicism is the fullest, the most complete, the most true--not just for some hut for all.