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Sjoerdiestriker t1_j2d60ef wrote

Reply to comment by morold in Eli5 How exactly does Noise cancellation work? That too in such small airbuds by Professional-Ad3441

Either that, or the quality of the noise reduction reduces. Imagine again playing a sound with throughs where the original sound had peaks and visa versa, but with a smaller magnitude than the original sound. Now the magnitude of the resulting wave will still be reduced, but not become exactly 0, so the noise cancellation will be imperfect

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