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How noise-canceling headphones work
- The microphone on the earcup listens out for ambient noise.
- When the noise is registered, the microphone sends the frequency and amplitude of the incoming wave back to the noise-canceling circuitry.
- An out-of-phase sound is created, then fed into the headphone speakers, along with the music you're playing.
- It cancels out around 70 percent of external noise without affecting the music you're listening to.
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When using noise-canceling headphones, the unwanted sounds are canceled out by creating an opposing sound wave to the one you want to eliminate.
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