Vibration
Vibration
Vibration (/vaɪˈbreɪʃən/) is a mechanical phenomenon whereby oscillations occur about an equilibrium point. 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.
Etymology
The term "vibration" comes from the Latin vibrātiō (a shaking, a brandishing). The original sense was ‘a shaking or brandishing’, later ‘a rapid movement to and fro’.
Related Terms
- Oscillation: The action of oscillating in a mechanical system.
- Resonance: The increase in amplitude of oscillation of an electric or mechanical system exposed to a periodic force whose frequency is equal or very close to the natural undamped frequency of the system.
- Frequency: The number of occurrences of a repeating event per unit of time.
- Amplitude: The maximum extent of a vibration or oscillation, measured from the position of equilibrium.
- Damping: The decrease in amplitude of an oscillation or vibration over time, typically caused by friction or resistance.
- Harmonic: A component frequency of the signal that is an integer multiple of the fundamental frequency.
Medical Relevance
In the medical field, vibration can be used for therapeutic purposes, such as in Vibration Therapy. This form of therapy involves the use of vibrating devices that can produce vibrations of different frequencies and amplitudes. It has been found to be effective in improving bone density, muscle strength, balance, and mobility in certain patient populations.
Vibration can also be a symptom of certain medical conditions, such as Parkinson's Disease, where patients may experience a resting tremor or vibration in their hands or other body parts.
Whole Body Vibration (WBV) is a form of therapy that involves standing on a platform that vibrates at a specific frequency. WBV has been shown to improve muscle strength and balance in older adults and people with certain health conditions.
Vibroacoustic Therapy (VAT) is a form of therapy that uses sound and vibration to reduce stress, relieve pain, and improve quality of life in people with a variety of health conditions.
External links
- Medical encyclopedia article on Vibration
- Wikipedia's article - Vibration
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