The sound board operates by the principle of forced vibration.
2.
There are two main technologies of vibration drilling : self-maintained vibration systems and forced vibration systems.
3.
When an outside source applies forced vibration that matches a string's natural frequency, the string vibrates.
4.
Natural vibrations are different from forced vibrations which happen at frequency of applied force ( forced frequency ).
5.
He was also interested in the properties of other musical instruments based on forced vibrations such as the violin.
6.
"' Forced vibration "'is when a time-varying disturbance ( load, displacement or velocity ) is applied to a mechanical system.
7.
The natural frequency and damping ratio are not only important in free vibration, but also characterize how a system behaves under forced vibration.
8.
The plot of these functions, called " the frequency response of the system ", presents one of the most important features in forced vibration.
9.
Ambient vibrations were however supplanted-at least for some time-by forced vibration techniques that allow to increase the amplitudes and control the shaking source and their system identification methods.
10.
Even though M . Trifunac showed in 1972 that ambient and forced vibrations led to the same results, the interest in ambient vibration techniques only rose in the late 1990s.
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