Vibration is a mechanical phenomenon whereby oscillations occur about an equilibrium point. The word comes from Latin vibrationem ("shaking, brandishing") The oscillations may be periodic, such as the motion of a pendulum—or random, such as the movement of a tire on a gravel road.
Vibration can be desirable: for example, the motion of a tuning fork, the reed in a woodwind instrument or harmonica, a mobile phone, or the cone of a loudspeaker.
In many cases, however, vibration is undesirable, wasting energy and creating unwanted sound. For example, the vibrational motions of engines, electric motors, or any mechanical device in operation are typically unwanted. Such vibrations could be caused by imbalances in the rotating parts, uneven friction, or the meshing of gear teeth. Careful designs usually minimize unwanted vibrations.
The studies of sound and vibration are closely related. Sound, or pressure waves, are generated by vibrating structures (e.g. vocal cords); these pressure waves can also induce the vibration of structures (e.g. ear drum). Hence, attempts to reduce noise are often related to issues of vibration.
Vibrations is an album by vibraphonist Milt Jackson featuring performances recorded in 1960 and 1961 and released on the Atlantic label in 1964.
The Allmusic review awarded the album 3 stars.
Vibration refers to mechanical oscillations about an equilibrium point.
Vibrations or The Vibrations may also refer to:
Grimace may refer to:
McDonaldland was a fantasy world used in the marketing for McDonald's restaurants. According to a lawsuit, it was based on the "total concept and feel" of Sid and Marty Krofft's H.R. Pufnstuf television program. McDonaldland was inhabited by Ronald McDonald and other characters. In addition to being used in advertising, the characters were used as the basis for equipment in the playgrounds attached to some McDonald's. McDonaldland and the supporting characters were dropped from McDonald's marketing in 2003, but Ronald McDonald is still seen in commercials and in Happy Meal toys.
The first phase of the McDonaldland concept began in January 1971, when McDonald's was replacing its drive-ins with mansard roofed restaurants. The early commercials were built on an upbeat, bubble-gum style tune, and featured a narrator; many had plots that involved various villains trying to steal a corresponding food item, foiled by Ronald.
McDonaldland itself, as it was depicted in the commercials, was a magical place where plants, foods, and inanimate objects were living, speaking characters. In addition to being the home to Ronald and the other core characters, McDonaldland boasted a theme park of "Thick Shake Volcanoes", anthropomorphized "Apple Pie Trees," "French Fry Bushes" (where McDonald's French Fries grew from bushes), "The Hamburger Patch" (where McDonald's hamburgers grew out of the ground like plants), "Filet-O-Fish Lake", and many other fanciful features based around various McDonald's menu items. In the commercials, the various beings are played by puppets or costumed performers, very similar to those used in the popular H.R. Pufnstuf TV show.
Grimace (also Grymace or Grimache) was a French composer active in the mid-to-late 14th century.
Grimace was active in the period of music history known as the ars nova and was probably a contemporary of Guillaume de Machaut, since his compositions lack the complicated rhythms of the Ars subtilior (Günther 2007). Grimace's birth and death dates are not known; little is known about him outside of attributions in medieval music manuscripts. Five works are attributed to him securely; two doubtful attributions have been proposed based on stylistic similarities. His virelai, A l'arme, A l'arme, is his most often performed work in modern times.
The works attributed to Grimace are:
Doubtful works: