Scientists have been able to use sound waves to levitate objects in midair before, but the new method allows them to manipulate objects midair without touching them, Fox News reported.
Study co-author Daniele Foresti, a mechanical engineer at the ETH Zurich in Switzerland, and his team built tiny transducers powerful enough to levitate objects but of such diminutive size that they can be packed closely together.
The new method works by slowly switching off one transducer while another ramps up.
The method develops a moving sweet spot for levitation, which enables the scientists to move the object midair.
The sounds waves that are blasted at a noise level of 160 decibels, which is as high as a jet taking off.
The study findings have been published in the journal Proceedings of the National Academy of Sciences.