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/ Join our listener community on Reddit: https://www.reddit.com/r/TheHyperfine/ Follow the show on Instagram @thehyperfine: https://www.instagram.com/thehyperfine/ Derek on Instagram (and Twitter) @liketortilla: https://www.instagram.com/liketortilla/ Zak on Twitter @phyzaks: https://twitter.com/phyzaks