Science Daily  October 15, 2018
Researchers in the UK developed SoundBender by overcoming the limitations of previous ultrasound levitation set-ups by developing a hybrid system that combines the versatility of phased arrays of transducers (PATs) with the precision of acoustic metamaterials while helping to eliminate the restrictions on sound field resolution and variability each of the previous approaches applied. The metamaterial provides a low modulator pitch to help create sound fields with high spatial resolution while the PAT adds dynamic amplitude and phase control of the field. They will present their paper at an upcoming ACM conference in Berlin, Germany…read more.