Making an invisible electric wire: Transporting electricity through air by ultrasonic waves

https://phys.org/news/2025-02-invisible-electric-wire-electricity.html

"guiding spark around obstacles, to hit specific spots, even in non-conductive materials... sparks heat up air, expanding/ lowering its density, hot air then guided by ultrasonic waves (safer than lasers) into regions where sound intensity is higher, next sparks then follow these regions of lighter air because of its lower breakdown voltage... compact, affordable, continuously operable....contactless Braille system, atmospheric sciences, biological procedures, selective circuit powering"