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Acoustic comb moves objects by using ultrasound.


1) Acoustic metasurface comb. That is used for moving objects. 


"By placing a metamaterial pattern on the surface of an object, the University of Minnesota researchers were able to use sound to steer it in a certain direction without physically touching it. Credit: Olivia Hultgren" (ScitechDaily.com/Not Science Fiction: A New Method To Move Objects Without Contact)

Acoustic systems can use for levitating objects. Normally, acoustic tweezers are used for moving small objects. In acoustic tweezers, soundwaves replace physical contact. And that denies the disturbance in those processes. Acoustic tweezers can move objects very accurately. 



But if the power of those systems is very high. They can use to transfer and levitate even large and heavy objects. The thing is that this kind of system can use to make magical illusions. 

The ceramic comb transfers the object. The idea of this system is that the sound waves will aim at the comb. And that comb starts to resonate. The ceramic pikes aim the soundwaves at the object. That allows people to move an object on the table without touching them. The acoustic systems can move objects on the layer.



Image 2) Acoustic tweezers.


Or they can also hover over objects above the table. The thing is that the symmetrical and identical soundwaves that are coming from four points can create standing wave movement. That thing makes objects hover between those sound sources. 

When we look at these kinds of systems, we must think one thing. Did people of Comb Ceramic culture or some other culture use acoustic combs to move objects on the table? Or did those people know the acoustic levitation? 



Image 3) Comb Ceramic culture 


From 4000 BCE to 2000 BCE in northeast Europe was the thing called Comb Ceramic culture. The remarkable thing in that culture was the ceramics with comb striped. And that thing causes the question did those people use similar combs to modern researchers to move objects on the tables? 



Image 3) Ceramics from Comb Ceramic culture. "Comb ceramic pottery from Estonia, 4000-2000 BCE". (Wikipedia/Comb Ceramic culture)

The ceramic comb that aims to soundwaves is one of the newest tools in mechanics. But when we are looking at the principle of that tool. We can think of a situation where a musical instrument like a drum or a Kankli will aim sound waves at the comb. And then that thing moves objects. This kind of system can be very impressive if people will not know about that system. 



https://scitechdaily.com/not-science-fiction-a-new-method-to-move-objects-without-contact/


https://scitechdaily.com/acoustic-tweezers-use-sound-waves-to-control-items/


https://en.wikipedia.org/wiki/Comb_Ceramic_culture


https://shorttextsofoldscholars.blogspot.com/

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