Fruit can negate sound
Potential uses
Since soundwaves can be cancelled by the same wave out of phase, and sound comes from vibrations, it is possible to counter sound and vibration based fruits like the gura gura no mi. Vibrations also cause ocean waves so it could be possible to use the fruit to calm the sea. Since all matter has a certain frequency, if you emit the same frequency but out of phase then you could possibly cancel the motion of of that matter. This fruit might also cause vertigo.
What do u think?