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I don't own noise-cancelling headphones, but I have normal headphones and a macbook.

Is there an app I can get that will play the noise-cancelling noises through my headphones by using my macbook's microphone?

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    It can't be done. A noise canceling headphone works by measuring the noise just outside each ear and creating the opposite signal. The computer's microphone isn't in the right place. – Eric S Jun 12 '17 at 20:57
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There's no way to make a noise-cancelling program over speakers because the computer has no way of knowing distance from your ears to the speakers.

Noise-cancelling headphones scan for incoming sound and produce the opposite (canceling) wave. "Noise-cancelling headphones" are a misnomer - they counter incoming sound instead of blocking it.

If the noise-cancelling came from speakers, the computer would need to know where your ears are in real-time and that's just infeasible.

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  • I think you are getting "speakers" and microphone confused; there are many problems, but the one you're tried to identify is that the computer doesn't know where the speakers (headphones) are in relation to the microphone of the computer. – theonlygusti Jun 12 '17 at 18:28

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