See the sound

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See the sound. Check out this famous video and see for yourself. The sound can be seen, it draws the correct patterns, depending on the frequency.

Sound is a longitudinal, mechanical wave. Sound can travel through any medium, but it cannot travel through a vacuum. There is no sound in outer space. Sound is a variation in pressure. A region of increased pressure on a sound wave is called a compression (or condensation). A region of decreased pressure on a sound wave is called a rarefaction (or dilation).

Waves are created when energy is transferred through a medium like water, air, or objects.

About sound:

NASA. What’s the science of sound?

The Nature of Sound