Robots Powered by Sound Waves

Researchers have developed an innovative technique to move ultra-small devices and robots using sound instead of traditional batteries and motors. This method relies on the phenomenon of acoustic resonance within a sound cavity, where sound waves are converted into a controllable propulsion force. This allows for the movement of tiny boats and unmanned aerial vehicles weighing less than a few hundred micrograms. Experiments have shown that these devices can move quickly and perform various mechanical functions, such as rapidly spinning blades, without the need for mechanical components or stored energy. This opens up new possibilities for creating autonomous devices and robots that operate entirely using only sound frequencies, especially in cases where installing a battery or motor inside the device is impossible.

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