Acoustic Levitation

Acoustic Levitation

Acoustic levitation results when a small object is placed into the node of a standing wave—an area where the acoustic pressure is almost zero. The technology enables scientists to work with materials that might crystallize or become contaminated upon contact with containers.

06:47

Key Facts In This Video

  • 1

    Two identical sound waves projecting in opposite directions can create a standing wave, which has neutral areas that don't oscillate. (1:22)

  • 2

    Acoustic levitation "floats" objects in the neutral areas of a standing wave. (1:43)

  • 3

    Water droplets undergoing acoustic levitation will explode when the amplitude of sound is increased beyond a certain threshold. (3:42)

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