The idea that something so intangible can lift objects may seem unbelievable, but it's a real phenomenon. Acoustic levitation takes advantage of the properties of sound to cause solids, liquids and heavy gases to float. The process can take place in normal or reduced gravity. In other words,...
The board is largely limited to the levitation of small spherical pieces of foam, with the ultrasonic field levitating them in midair. However, the project video shows how these tiny pieces of foam can be attached to threads, tapes, and other objects in order to manipulate them with the ult...
Standing waves have nodes (where the pressure is at minimum) and antinodes (where the pressure is at maximum). The nodes are critical in acoustic levitation: It’s there that the pressure is such that it can essentially cancel out gravity and allow small objects to float. Example of a sta...
Specifically, we show that the HOT modes achieve the stable confinement and rotational lock of objects with very diverse shapes, weights, and sizes, including irregular bodies, heavy samples, and large Mie particles, as well as the simultaneous levitation of multiple objects in different positions,...
levitation in the third dimension. The idea is demonstrated in both simulation and experiments operating at 500 kHz, and the achieved levitation force reaches three orders of magnitude larger than for previous 3D trapping. This hybrid acoustic tweezer that integrates acoustic streaming adds an ...
Acoustic tractor beams use the power of sound to hold particles in mid-air, and unlike magnetic levitation, they can grab most solids or liquids. For the first time University of Bristol engineers have shown it is possible to stably trap objects larger than the wavelength of sound in an aco...
Acoustic Levitation for Large Particle Based on Concave Spherical Transducer Arrays. IEEE Sens. J. 22, 18104–18113 (2022). Article ADS Google Scholar Friedrich, L., Collino, R., Ray, T. & Begley, M. Acoustic control of microstructures during direct ink writing of two-phase materials. ...
As advances in acoustic levitation expand, the ability to work with finer and finer chemical reactions will allow members of the pharmaceutical science community to expand their reach, perhaps discovering many new medicines with life-saving qualities. ...
A styrofoam particle of 1.6cm (1.88 wavelengths of sound) trapped in the centre of a 40kHz ultrasonic generator of virtual vortices.Photo Source: University of BristolAcoustic tractor beams use the power of sound to hold particles in mid-air, and unlike magnetic levitation, ...
We propose a new approach to the generation of acoustic frequency combs (AFC)—signals with spectra containing equidistant coherent peaks. AFCs are essential for a number of sensing and measurement applications, where the established technology of optica