Vibration

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 (Milt Jackson album)

Vibrations is an album by vibraphonist Milt Jackson featuring performances recorded in 1960 and 1961 and released on the Atlantic label in 1964.

Reception

The Allmusic review awarded the album 3 stars.

Track listing

Personnel

Vibrations (disambiguation)

Vibration refers to mechanical oscillations about an equilibrium point.

Vibrations or The Vibrations may also refer to:

UBM plc

UBM plc is a multinational media company headquartered in London, United Kingdom. Its principal operations are live media and business-to-business communications, marketing services and data provision, and it principally serves the technology, healthcare, trade and transport, ingredients and fashion industries. UBM is listed on the London Stock Exchange and is a constituent of the FTSE 250 Index.

History

The history of the companies that now make up UBM stretches back almost two hundred years. UBM businesses still publish many other titles that were launched in the 19th century, including Building magazine, launched in 1843 by Joseph Hansom, as well as Chemist & Druggist.

The company was founded in 1918 as United Newspapers by David Lloyd George to acquire the Daily Chronicle and Lloyd's Weekly Newspaper. In 1929, the company merged with Provincial Newspapers, an owner of regional papers in the north; the next year, it sold its national papers. The company continued for decades as a regional newspaper publisher, making acquisitions such as Yorkshire Post Newspapers in 1969.