A new and improved way to levitate objects using sound waves alone is an impressive feat of mixed-reality technology that could pave the way for some seriously futuristic holograms.
The researchers were able to levitate individual polystyrene beads and water particles inside a special enclosure and make them move in three dimensions by adjusting the output of hundreds of small speakers, set up in a grid.
They were able to show a movie of a leaping rabbit when they floated a small piece of fabric in the air.
A fatal flaw was addressed by the team. The researchers were able to move the object despite the interference by increasing the number of speakers and using sophisticated software.
An obstruction inside the enclosure could cause sound waves to bounce around aimlessly and cause levitating objects to fall out of the sky.
In the past, our 3D displays had to exist in a vacuum, but now we can create 3D content right there in front of you.
"Simply 3D shapes sharing the very space in which we live", he said.
The result is amazing. In one experiment, the team was able to levitate a water droplet over a moving glass of water, an object that would've otherwise been a massive source of interference.
Ryuji Hirayama, lead author from University College London, said that it opens up the possibilities for interactive holograms.
A new system that allows for more than one source of interference is being created by the team.
The researcher said he was excited for how the work opens the door for mixing many different materials in 3D printing. This work paves the way for realising the huge potential of acoustic levitation in precision manufacturing.
Despite interference, objects are kept airborne.
There are hologram displays aboutUkraine's president making international appearances.
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