Pianotech

The activated strings are in the middle, and the impulse comes from the right of the screen (upward in transverse direction), hits the bridge and is reflected in inversion (downward transverse direction), and we see several repeats of this. We see the two strings go out of phase, so I guess the unison wasn't clean. This is NOT an example of longitudinal mode. It is an example of traveling transverse mode vibration. As it progresses, the single traveling wave becomes a little more complex, "bouncing" a bit. I think this is the onset of the vibration "resolving" into transverse standing waves. The file was titled A13 string, so I assume the fundamental frequency would be close to 55 cycles per second, a cycle being back and forth. In two minutes, we are seeing 26 cycles (that's what I counted), or a bit less than half a second of time.

#Transversetravelingwaves #bassstringvibration