Acoustic levitation uses acoustic radiation forces to counteract gravity and suspend objects
in mid-air. Although acoustic levitation was first demonstrated almost a century ago, for a …

Mid-air acoustic levitation is becoming a powerful tool to suspend and manipulate millimetric
objects. Because of its unique characteristics, acoustic levitation is suitable to trap a wide …

Acoustic levitation has the potential to enable novel studies due to its ability to hold a wide
variety of substances against gravity under container-less conditions. It has found …

The technique of acoustic levitation normally produces a standing wave and the potential
well of the sound field can be used to trap small objects. Since no solid surface is involved it …

We demonstrate that acoustic levitation can levitate spherical objects much larger than the
acoustic wavelength in air. The acoustic levitation of an expanded polystyrene sphere of 50 …

We demonstrate acoustic trapping in both position and orientation of a non-spherical particle
of sub-wavelength size in mid-air. To do so, we multiplex in time a pseudo-one-dimensional …

We describe and experimentally explore a nonlinear stiffness model of the trapping of a
solid particle in a single-axis acoustic levitator. In contrast to the commonly employed linear …

Acoustic levitation can be employed to hold liquid drops in midair, enabling novel
applications in X-ray scattering of proteins, amorphous crystallization of solutions, or …

In this paper, a nonlinear dynamic model of single-axis standing-wave acoustic levitation is
studied theoretically and experimentally to explore the effect of nonlinear coupling between …

As a newly developed arc welding method, power ultrasound has been successfully
introduced into arc and weld pool during ultrasonic wave-assisted arc welding process. The …