Never 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

Who gets handed the problem of how to filter some EM and think to themselves hey, let's try turning this into sound...?

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