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Comment by shadowgovt | Hacker News Reader

This is one of those cool ideas that is much easier to grasp with some animated visuals. I haven't found one for this specific application, but adjacent work in using sound to move small objects is seen at https://www.youtube.com/watch?v=XpNbyfxxkWE , https://www.youtube.com/watch?v=3MXVSdXZzpc , and https://www.youtube.com/watch?v=tzWP-NL3Lck

Controlling the motion involves a lot of prediction and wave modeling, which should be a perfect application for high-performance computing.

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Wow!

https://sciencedemonstrations.fas.harvard.edu/presentations/...

In the Supplementary Materials, there's a set of example videos of this work in action. In particular, the helix shape is pretty cool to see form in (essentially) the blink of an eye.

https://www.science.org/doi/suppl/10.1126/sciadv.adf6182/sup...

Here's a kit you can buy, for a single point version: https://a.co/d/bZVnuOS

Neat! The paper slightly reminds me of imagining what would happen if you tossed a big handful of dry sand into the path of the ultrasound in the product you linked.

I’d guess you’d be politely but firmly asked to leave the lab. :P

Reminds me of Kryptonian tech in Man of Steel

This is exactly what this reminded me of. I can forsee high fidelity solid, textured holograms just being some kind of colour changing liquid that's controlled with sound waves.

Perhaps 100 years into the future we will have dynamic furniture at a whim in our houses through some kind of similar technology .. or be able to materialize dynamic cooking pots exactly suitable for each dish, and then de materialize them afterwards (skip cleaning!), rather than store 20-odd differently sized pots.

That’s assuming we would still have pots or a need for them with this tech.

I was thinking maybe some day an artist could release concept album that, with a little material added in a stereo field, animates material into a 3D moving scene, like a hologram movie except with real stuff.

I see a micro LED assembly solution

drop it down to mems mirror like dmd

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