4 ms·

While I agree this is probably fictional, the technology of canceling out sound waves (Well any wave) is pretty simple. Obviously filtering and replacing the so

• usrusr 11y ago
  Wi-Fi energy harvesting, at least at the level required for active noise-canceling, is very much fictional technology.
• dogma1138 11y ago
  Not sure if it's fictional, I've worked in a few secure buildings i my life and we had an oscillator glued to the glass of every external window. This was basically to prevent the use of any laser or parabolic microphones, however it also had a nice effect in which it really dampened the noise not only from the outside, but also interestingly enough the internal noise which bounces off the windows in your office. If you would stand and talk near a large window with one of those things on it you will actually hear some muffling in the conversation you are having with the guy next to you. The device it self was fairly small about the size of a match box, and I'm pretty sure it was nothing more than some piezoelectric oscillator that generates random noise in the window. For it to be completely noise canceling well if you tie it to an external microphone you are pretty much getting noise canceling headphones on a Window. The amount of power needed for such devices is also fairly small there are "vibration" stickers that you stick to glass and some other surfaces that run on a single cell battery, and to cancel the noise you'll need even less power. From what it looks to me if you pretty much glue your active noise canceling headphones to a vibration speaker and stick it on a window you get this device.