Vibration is a mechanical phenomeno

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.

ผลลัพธ์ (แอฟริกา) 1:

Vibrasie is 'n meganiese verskynsel waardeur ossillasies voorkom oor 'n ewewigspunt. Die woord kom van Latyns-vibrationem ( "skud, swaai"). Die ossillasies Mag periodieke wees, soos die beweging van 'n pendulum-of Random, soos die beweging van 'n band op 'n grondpad.

Vibrasie Kan wenslik wees: byvoorbeeld die beweging van 'n stemvurk, die riet in 'n houtblaasinstrument. of mondfluitjie, 'n selfoon, of die keël van 'n luidspreker.

In baie gevalle egter vibrasie is ongewens, mors en die skep van ongewenste klankenergie. Byvoorbeeld, die vibrasie bewegings van enjins, elektriese motors, of enige meganiese toestel in werking is tipies ongewenste. Sulke vibrasies kan veroorsaak word deur wanbalanse in die roterende dele, ongelyke wrywing, of die inkammende van rattande. Versigtig Designs gewoonlik beperk Ongewenste vibrasies.

Studies van die klank en vibrasie is nou verwant. Klank, of druk golwe, gegenereer deur vibrerende strukture (bv stembande); hierdie drukgolwe kan ook die trilling van strukture (bv trommelvlies) veroorsaak. Dus, probeer om geraas te verminder, word dikwels in verband met kwessies van vibrasie.