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 […]
Category Archives: Acoustic tweezer
Physicists Have Developed a New Way to Levitate Objects Using Sound Only
Science Alert July 26, 2021 There are significant limitations hindering acoustic tweezers for broad practical application. Although hemispherical arrays of acoustic transducers can be used to create the sound trap, creating just the right sound field to lift an object and move it far from the transducers is very difficult if there is a surface that reflects sound. Researchers in Japan have developed a technique splitting the transducer array into blocks and used an inverse filter to reproduce sounds based on the acoustic waveform. This helps optimize the phase and amplitude of each transducer channel to produce the desired acoustic […]