> Used this way, the thin-film loudspeaker could provide active noise cancellation in clamorous environments, such as an airplane cockpit, by generating sound of the same amplitude but opposite phase; the two sounds cancel each other out.

As someone who suffers from “eardrum suck” [0] when using noise canceling headphones, I’d be concerned if the idea of active noise canceling environments caught on.

[0] https://www.nytimes.com/wirecutter/blog/how-do-noise-cancell...