Originally Posted by
sunburst
Now that we have holographic studies of plate motion in acoustic stringed instruments we can see that, in fact, archtop and flat top instruments behave very similarly in the way they transform string energy to air movement (audible sound). Each responds to input from the strings and bridge by moving according to the plate's normal modes of motion, and those turn out to be very similar in everything from classical guitars to jazz archtops to mandolins to etc.. Furthermore, the laws of physics tell us that the normal modes of motion are the only way a plate can move, and any input of energy gives the same result; blast it with sound from a speaker, tap on the instrument, play another instrument next to it, pluck the strings of the instrument, whatever; it will move in it's normal modes of motion.
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