Plasma-based noise cancelling could silence rooms, cars and planes
EPFL researchers have developed a 100% effective, ultra-thin active noise cancelling system that uses an ionized air plasma propulsion system instead of speakers. A 17-mm-thick (0.6-in) layer can block 20 Hz noise as well as a 4-m-thick (13-ft) wall.Co… Continue reading Plasma-based noise cancelling could silence rooms, cars and planes