Vibrating Strings: Physics of Stationary Waves & Oscillation Types

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The discussion focuses on the physics of stationary waves and their role in producing musical notes on instruments like the guitar. It clarifies the distinction between free and forced oscillations, noting that when a driver is present, the oscillation is forced. Once the driver is removed, the oscillation becomes free. In the case of a guitar, plucking the string initiates a forced oscillation, which then transitions to free oscillation until further manipulation occurs. Understanding these concepts is essential for grasping how musical sounds are generated.
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I am quite aware of the Physics behind Stationary Waves and how this is responsible for the different notes we hear on a musical instrument; a guitar for instance. What I don't fully understand is the classification of the oscillations of the string. Is it a free oscillation or a forced oscillation?
 
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When there is a driver present, it is a forced oscillation. After you remove the driver, it is a free oscillation. For a guitar, you only pluck the string momentarily, and afterward you let it oscillate freely, unless you manipulate the whammy bar or something.
 

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