Realization of Compact Tractor Beams using Acoustic Delay-Lines

[@jacklai2531]

The link to supplementary material in Applied Physics is not working?, is there a new link.

[@UpnaLab]

Suplemental is here aip.scitation.org/doi/suppl/10.1063/1.4972407 and Instructables is here www.instructables.com/id/Acoustic-Tractor-Beam/

[@iGame3D]

How big does it have to be to create a hover board?

[@LimeyRedneck]

🤠💜