Look at the sound of that!

So cool that it almost Hz.

In the past, people have used sand to tune instruments by placing it on a flat part of the instrument and looking for the patterns. This video shows certain tones resonating with the metal plate which causes waves to form. These waves crash into each other at certain points which cause the waves to cancel themselves out. It’s at these points that the sand forms.

If you want to find the secrets of the universe, think in terms of energy, frequency and vibration.― Nikola Tesla

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