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Shaped with ultrasound: Max Planck researchers from Stuttgart transmit ultrasonic waves through a bath of water and microparticles. In doing so, they model the profile of the sound pressure with a hologram in such manner that the particles are pushed into the shape of Picasso's peace dove. © Kai Melde / MPI for Intelligent Systems / Ultrasound driven surfer: a standing wave can be produced on the water's surface with a hologram, on which a paper boat surfs along in circles. © Alejandro Posada / MPI for Intelligent Systems

Holograms with sound

A new way of shaping sound waves in 3D aids technology and could be useful for medical ultrasound applications

Sound can now be structured in three dimensions. Researchers from the Max Planck Institute for Intelligent Systems and the University of Stuttgart have found a way of generating acoustic holograms, which could improve ultrasound diagnostics and material testing. The holograms can also be used to move and manipulate particles.


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Peer Fischer
Professor, University of Stuttgart<br/ >Max Planck Research Group Leader
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Kai Melde
Ph.D. Student
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Andrew Mark