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Tag: vibrating string

Rolling Shutter and online guitar videos

Rolling Shutter and online guitar videos

When you search for videos online of plucking a string on an instrument such as the guitar, a surprising number of searches lead you to videos such as the following: This is not how plucked strings look like! And they don’t have anything to do with Harmonics either! The reason why you are seeing those shapes on the guitar is due to the rolling shutter effect on your camera. But if you do want to see how plucked strings look…

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Even and Odd Harmonics of a vibrating string

Even and Odd Harmonics of a vibrating string

In the previous section we took a look at the vibrating string fixed at both ends and found that in order for the boundary condition to be satisfied, the following are the only solutions possible:† The solutions on the left of the image are often termed as ‘Odd Harmonics’ because they have odd number of anti-nodes and the ones of the right have even number of anti-nodes hence ‘Even Harmonics’ If you pluck a string right at the center, you…

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Standing Waves

Standing Waves

If you have a solid understanding of what Traveling waves are (click here if you need a refresher) then when you add up a sine wave moving to the right with a wave moving to the left, you get a standing wave. $ y(x,t) = \sin(kx-\omega t) + \sin(kx + \omega t) $ Using $ \sin(a) + \sin(b) = 2 \sin((a+b)/2) \cos((a-b)/2) $ and simplifying the above equation we get : $y(x,t) = 2\sin(kx)\cos(\omega t) $ A plot of this…

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