acoustic hologram

acoustic hologram

[ə′küs·tik ′häl·ə‚gram]
(engineering)
The phase interference pattern, formed by acoustic beams, that is used in acoustical holography; when light is made to interact with this pattern, it forms an image of an object placed in one of the beams.
References in periodicals archive ?
Here we individually control dozens of loudspeakers to tell us an optimal solution to generate an acoustic hologram that can manipulate multiple objects in real-time without contact.
The team, including scientists from the University of Sussex, created a force field known as an acoustic hologram - and adjusting speaker output allowed them to manipulate the 10microgram ball.
We can individually control dozens of loudspeakers to tell us an optimal solution to generate an acoustic hologram that can manipulate multiple objects in real-time without contact.
Based on this map, they then fabricated the acoustic hologram using a 3D printer that created a relief from a plastic that transmits sound faster than the surrounding liquid.
Caption: 3D printed plastic acoustic hologram relief pattern.
The possibilities for acoustic holograms to manipulate particles are enormous--as are other potential applications when combined with ultrasound for medicine and materials testing.
What we have here is what we call an acoustic hologram.
But scientists have designed technology that replaces light in the hologram with sound, giving us acoustic holograms that can be used to manipulate small objects.
Researchers from the Max Planck Institute for Intelligent Systems in Stuttgart, Germany, have created these acoustic holograms by first printing a hologram plate using a 3D printer, and then transmitting ultrasound waves through it and into another medium, which could be liquid or gas.
His group now hopes to develop three-dimensional images - acoustic holograms - of the interior magnetic structures.