Phys.org  August 22, 2022 The previous acoustic tweezers developed by researchers in Japan could lift things from reflective surfaces without physical contact, but stability remained an issue. Now, using an adaptive algorithm to fine-tune how the tweezers are controlled, they have drastically improved how stably the particles can be lifted. They found a way of using the same setup to achieve significant enhancements in how they can lift particles from rigid surfaces. With the right arrangement of speakers at the right frequency, amplitude, and phase, it becomes possible to superimpose the sound waves and setup a field of influence which […]