A Shepard tone, named after Roger Shepard, is a sound consisting of a superposition of sine waves separated by octaves. When played with the base pitch of the tone moving upward or downward, it is referred to as the Shepard scale. This creates the auditory illusion of a tone that continually ascends or descends in pitch, yet which ultimately seems to get no higher or lower. It has been described as a "sonic barber's pole".
Read more about Shepard Tone: Construction, The Tritone Paradox, Examples
Famous quotes containing the words shepard and/or tone:
“Getting emotional about things is a peacetime luxury. In wartime, it’s much too painful.”
—Edmund H. North, British screenwriter, and Lewis Gilbert. Captain Shepard (Kenneth More)
“There was about all the Romans a heroic tone peculiar to ancient life. Their virtues were great and noble, and these virtues made them great and noble. They possessed a natural majesty that was not put on and taken off at pleasure, as was that of certain eastern monarchs when they put on or took off their garments of Tyrian dye. It is hoped that this is not wholly lost from the world, although the sense of earthly vanity inculcated by Christianity may have swallowed it up in humility.”
—Herman Melville (1819–1891)