Zak and Derek discuss acoustic levitaiton with Dr. David Jackson, Professor of Physics and Astronomy at Dickinson College.
Their published paper at AAJP (requires subscription), "Acoustic levitation and the acoustic radiation force":
https://aapt.scitation.org/doi/10.1119/10.0002764
You can contact Dr. Jackson to request a copy:
https://www.dickinson.edu/site/custom_scripts/dc_faculty_profile_index.php?fac=jacksond
Ming-Hua Chang's senior thesis, "Using Schlieren Optics to Visualize Ultrasonic Standing Waves In Acoustic Levitation":
https://scholar.dickinson.edu/cgi/viewcontent.cgi?article=1391&context=student_honors
Dr. Daniel A Russell's Acoustics and Vibration Animations:
https://www.acs.psu.edu/drussell/demos.html
Selected gifs of wave motion:
https://www.acs.psu.edu/drussell/Demos/waves/wavemotion.html
https://www.acs.psu.edu/drussell/Demos/Reflect-Particles/Reflect-Particles.html
https://www.acs.psu.edu/drussell/Demos/phase-p-u-sine/phase-p-u-sine.html
https://www.acs.psu.edu/drussell/Demos/SWR/SWR.html
Physics Girl video building an acoustic levitator on Youtube:
https://www.youtube.com/watch?v=ABjRnSYw-4k
Acoustic levitation on Wikipedia:
https://en.wikipedia.org/wiki/Acoustic_levitation
The podcast lives at https://www.thehyperfine.com/
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Zak on Twitter @phyzaks: https://twitter.com/phyzaks
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