it effectively needs to be fatter than the speed of sound. sound needs to hit the mic of the noise cancelling device, its inverse needs to be found before the s

it effectively needs to be fatter than the speed of sound. sound needs to hit the mic of the noise cancelling device, its inverse needs to be found before the sound hits your ear drums so it can be played at exactly the same time. all this needs to happen in the time it takes for the sound to travel from the devide to your ears. super fucking fast.