Changes

[[File:lighterstill.jpg]][[File:Distortion.jpg|right|frame]]

[[File:lighterstill.jpg]][[File:Optical-Distortion_Robert-DOISNEAU.jpg|right|frame]]

A '''distortion''' is the alteration of the [[original]] shape (or other characteristic) of an object, [[image]], [[sound]], [[wave]]form or other form of [[information]] or representation. Distortion is usually unwanted. In some fields, distortion is desirable, such as [http://en.wikipedia.org/wiki/Electric_guitar electric guitar] (where distortion is often induced [[purposely]] with the amplifier or an electronic effect to achieve an aggressive sound where desired). The slight distortion of analog tapes and [http://en.wikipedia.org/wiki/Vacuum_tube vacuum tubes] is considered pleasing in certain situations. The addition of [[noise]] or other extraneous signals (hum, interference) is not considered to be distortion, though the effects of distortion are sometimes considered noise

A '''distortion''' is the alteration of the [[original]] shape (or other characteristic) of an object, [[image]], [[sound]], [[wave]]form or other form of [[information]] or representation. Distortion is usually unwanted. In some fields, distortion is desirable, such as [http://en.wikipedia.org/wiki/Electric_guitar electric guitar] (where distortion is often induced [[purposely]] with the amplifier or an electronic effect to achieve an aggressive sound where desired). The slight distortion of analog tapes and [http://en.wikipedia.org/wiki/Vacuum_tube vacuum tubes] is considered pleasing in certain situations. The addition of [[noise]] or other extraneous signals (hum, interference) is not considered to be distortion, though the effects of distortion are sometimes considered noise