distortion


distortion
/di stawr"sheuhn/, n.
1. an act or instance of distorting.
2. the state of being distorted or the relative degree or amount by which something is distorted or distorts.
3. anything that is distorted, as a sound, image, fact, etc.
4. Optics. an aberration of a lens or system of lenses in which the magnification of the object varies with the lateral distance from the axis of the lens. Cf. barrel distortion, pincushion distortion.
[1575-85; < L distortion- (s. of distortio). See DISTORT, -ION]

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      in acoustics and electronics, any change in a signal that alters the basic waveform or the relationship between various frequency components; it is usually a degradation of the signal. Straight amplification or attenuation without alteration of the waveform is not usually considered to be distortion. Amplitude distortion refers to unequal amplification or attenuation of the various frequency components of the signal, and phase distortion refers to changes in the phase relationships between harmonic components of a complex wave. Intermodulation distortion is a result of nonlinearities in the system such that one frequency component tends to modulate another frequency component—e.g., a high audio frequency modulating a low audio frequency. In audio systems, the most noticeable types of distortion are amplitude, frequency, and intermodulation. In video systems, appreciable distortion of any kind may be observed as a degradation of the reproduced image. Noise added to a signal, either purposely or inadvertently, is sometimes referred to as distortion.

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Universalium. 2010.

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Look at other dictionaries:

  • Distortion — Dis*tor tion, n. [L. distortio: cf. F. distortion.] 1. The act of distorting, or twisting out of natural or regular shape; a twisting or writhing motion; as, the distortions of the face or body. [1913 Webster] 2. A wresting from the true meaning …   The Collaborative International Dictionary of English

  • Distortion — (lat./engl. für ‚Störung, Verzerrung‘) steht: in der Nachrichtentechnik die ungewünschte Verfälschung eines Signals durch einen Verstärker, siehe Verzerrung (Akustik) in der Musik ein Effektgerät, siehe Verzerrer Siehe auch: Verzerrung Distorsion …   Deutsch Wikipedia

  • Distortion — Distortion. См. Коробление. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) …   Словарь металлургических терминов

  • distortion — I noun anamorphosis, camouflage, caricature, contortion, convolution, deception, deformation, deformity, disguise, disparity, disproportion, dissemblance, dissimilarity, dissimilitude, distortio, embroidery, enlargement, exaggeration, expansion,… …   Law dictionary

  • distortion — 1580s, action of distorting, from L. distortionem (nom. distortio), noun of action from pp. stem of distorquere (see DISTORT (Cf. distort)). Figurative use (of words, etc.) from 1640s …   Etymology dictionary

  • distortion — [n] deformity; falsification baloney*, bend, bias, BS*, buckle, coloring, contortion, crock, crookedness, exaggeration, intorsion, jazz*, jive*, lie, line, malconformation, malformation, misinterpretation, misrepresentation, misshape,… …   New thesaurus

  • distortion — [di stôr′shən] n. [L distortio] 1. a distorting or being distorted 2. anything distorted distortional adj …   English World dictionary

  • Distortion — This article is about technology, especially electrical engineering. For other uses, see Distortion (disambiguation). Distort redirects here. For other uses, see Distort (disambiguation). A distortion is the alteration of the original shape (or… …   Wikipedia

  • Distortion — (Roget s Thesaurus) >Irregularity of form. < N PARAG:Distortion >N GRP: N 1 Sgm: N 1 distortion distortion detortion contortion Sgm: N 1 twist twist crookedness &c.(obliquity) 217 Sgm: N 1 grimace grimace Sgm: N 1 deformity …   English dictionary for students

  • distortion — noun 1 change in shape/sound ADJECTIVE ▪ severe ▪ slight ▪ inevitable ▪ image VERB + DISTORTION ▪ …   Collocations dictionary


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