This is also levitation, albeit unscientific, but very beautiful
According to some hypotheses, it was acoustic levitation that was used by the ancient "gods" to move huge megaliths and other super-heavy objects. Well, even modern science already has something to say about this, although these are only the initial stages, and it is possible to levitate relatively small objects. British scientists have created a prototype of gloves that use acoustic levitation to move objects, and showed it at the ACM CHI 2016 conference. The researchers also presented a sonic screwdriver and pliers.
The gloves developed by scientists are called GauntLev or Gauntlet of Levitation (levitation gloves). With the help of acoustic levitation, they allow a person to non-contact grip and movement of small objects, both in the air and in the water. Unlike previous devices, these gloves can be moved with the gripped object, which retains its position using the built-in stabilization system.
In addition to gloves, the researchers also created a sonic screwdriver that can not only hold an object non-contact, but also rotate it. Manipulations can be carried out both manually and with the help of a computer to increase the accuracy and speed of their execution. Scientists also showed a prototype of acoustic ticks.
Devices can interact and combine with each other. The researchers suggest that such gadgets will help facilitate work in zero gravity and interact with fragile materials.
Acoustic levitation is the holding of an object in the air using a standing acoustic wave, which is formed when two plane waves with equal amplitudes, propagating towards each other, interfere. To create a standing wave, an acoustic emitter and reflector are required. In the presented devices, most likely, holographic acoustic levitation is used - this means that they have several emitters that focus on an object by adjusting the phases of wave oscillations, and then, by creating a difference between wave oscillations in the π-phase, objects are controlled … The reflector in this case remains focused on the subject.
Let's take a look at a video of how it works: