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Ultrasonic Chips Could Cut Interference in the IoT
- Animats 2y agoNice. 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.
- jonititan 2y agoBetter link for this. https://group.ntt/en/newsrelease/2024/07/22/240722b.html https://group.ntt/en/newsrelease/2024/07/22/240722b.html
- jerf 2y agoNever heard of a "surface wave acoustical filter" before. I love it. Whoever came up with the first iteration of that was a genius, a real out-of-the-box thinker. https://www.everythingrf.com/community/what-is-a-saw-filter https://www.everythingrf.com/community/what-is-a-saw-filter Who gets handed the problem of how to filter some EM and think to themselves hey, let's try turning this into sound...?
- kkylin 2y agoA 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.)
- KK7NIL 2y agoThe 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 https://en.m.wikipedia.org/wiki/Delay-line_memory