Lee PasifullNov 25, 2023
mcc
Oh this is … this is one of the strangest solo projects I've ever seen. "Volumetric Display using an Acoustically Trapped Particle". Dude has two speakers facing each other, they emit a wave that contains enough force a light foam bead is forced to levitate in the air between them, then by varying it he can move it around, and by changing the light of an LED shining on it he can give it color. He can draw basic 3D shapes and persistence of vision makes them appear real. https://www.youtube.com/watch?v=hCC1C5KIeUA
A Volumetric Display using an Acoustically Trapped Particle

YouTube
Nov 24, 2023 at 12:35amWeb
Show threadBrian Beach has movedNov 24, 2023

@mcc Wow. Thanks for posting.

I could say to myself, "yes, that makes sense" while watching the video, but so much of that is outside my skillset: driver circuits, FPGAs, circuit board layout, 3D simulations, and on and on.

Show threadwuestNov 24, 2023
@mcc oh yeah, Benn Jordan did a video about acoustic levitation a couple years ago too, it seems like a real cool (if impractical) topic!
Show threadjsjNov 24, 2023
@mcc @siracusa 200 speakers, not 2 :p
Show threadmccNov 24, 2023
@jsj There is a character limit on mastodon
Show threadvnangiaNov 24, 2023
@mcc Astonishing. @ancientjames is building some volumetric displays with actual LEDs spinning really quickly with the same persistence of vision approach.
Show threadfops Now On Merping Synth DownloadNov 24, 2023
@mcc you can actually make a really simple acoustic levitator with just two of those transducers just facing each other, theyre cheap
Show threadmccNov 24, 2023
@chfour yeah, it seems the hard part is not causing the levitation effect but controlling it
Show threadfops Now On Merping Synth DownloadNov 24, 2023
@mcc well yea then you have to adjust the frequency/phase/amplitude of all the transducers in real time so that it creates standing waves exactly where you want the ball to be i think
Show threadAndy4FutureNov 24, 2023
@mcc Very impressive.
Show threadJulie WebgirlNov 25, 2023

@mcc

1) I love cymantics.

2) I like to imaging the pyramids were built with sound.

3) "Acoustically Trapped Particle" ... Band Name!!!