Visualizing sound! Shadowgraph of an acoustic levitator.

Seeing sound waves is very challenging; perhaps elusive for many! Turns out an optical apparatus can be used to do that. We still need a high speed camera to see the waves traveling in real time (or almost real time) - which means hours of FUN in the lab! Hope you find this insightful!

---Acoustic levitator instructable:

https://www.instructables.com/id/Acoustic-Levitator/

---My blog describing the mathematics behind visualizing sound with shadowgraph and schlieren: https://zigunov.com/2020/05/01/seeing-sound-waves-with-your-schlieren-apparatus/

https://zigunov.com/2020/05/05/schlieren-vs-shadowgraph-for-sound-visualization-part-ii/

---Lecture on aliasing and the z-Transform: https://www.youtube.com/watch?v=dq7-Bqu8HRA&t=355s ... https://www.youtube.com/watch?v=_xCwCtAz2ys