ELI5: How do noise cancelling headphones work?

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ELI5: How do noise cancelling headphones work?

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  1. il798li Avatar

    Let’s say someone’s about to punch you. You don’t want it to hit your stomach. You would rather use your own fist to stop their fist from ever reaching you.

    Noise cancellation works by sending out opposite waves to what it detects in the surroundings, to stop the surrounding tone from ever entering your ear.