With such interplay of emitters and reflecting soft-structure, a 5 mm steel sphere (0.5 grams) was contactlessly transported in air solely by acoustophoresis.
Uso de acoustic levitation en inglés
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WIRED spoke with a physicist at Argonne National Laboratory to find out how acousticlevitation works and what it's used for.
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There are actually many different forms of levitation including something called acousticlevitation, which uses powerful sound waves to trap objects in mid-air.
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Acousticlevitation has been used before, said University of Vermont physicist Junrun Wu, coauthor of the study.