Could you noise cancel a room, or even an area in the outdoors?
In: Engineering
[this guy](https://www.youtube.com/watch?v=MCW5HUkrr-o) explain it in a funny way why you can’t scale it up.
the problem is that sound propagate in circle, think like throwing a rock into a lake, it create circle waves.
you can create a counter-wave in a point in space between you and the noise source to counter that but that counter-wave will be a circle wave too so it will cancel noise for you but will be another noise source for anyone positioned in a different point.
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