[tmikaeld]

And if I'm not mistaken, Fano resonances only work in a controlled environment like headphones (noise cancelling).

My comment wasn't a comment to the test in the article, but the expectations of the article - that any sound can be blocked, the writer is implying that this can be built into anything "a quieter world", which is not true for low frequencies which can't cancel itself out (without a very controlled environment like two subs of the same size in a cabinet, or an MRI machine) simply because it passes through objects and don't bounce.

I've seen noise cancellation concepts for the real world before, where a unit is placed on a window to cancel out outside noise by matching the vibrations of the sound.

In practice however, the sound waves are not predictable without a controlled environment, so it's just vaporware/concept [1].

[1] https://www.youtube.com/watch?v=Mv6sBuwzLhk