Ultrasonic Chips Could Cut Interference in the IoT(spectrum.ieee.org)
spectrum.ieee.org
Ultrasonic Chips Could Cut Interference in the IoT
https://spectrum.ieee.org/topological-acoustics
5 comments
A signal processing prof back in college had worked on radars in WWII, and he told us about using acoustic delay lines for various purposes. (Can't find a good reference in the couple minutes I have right now, unfortunately.)
The Wikipedia article on delay-line memory has a section on radar delay-lines and some references to go off of: https://en.m.wikipedia.org/wiki/Delay-line_memory
Nice. Although it has little to do with the "internet of things". It's an improvement in radio receiver filters, always useful but not a huge deal.
Better link for this.
https://group.ntt/en/newsrelease/2024/07/22/240722b.html
Who gets handed the problem of how to filter some EM and think to themselves hey, let's try turning this into sound...?