They’re not jsut well isolated, since you can turn off the noise canceling (at least, with my headphones)
In: Technology
Sound is “just” vibrations in the air. What ANC (active noise cancelling) headphones do is use the microphone(s) to read the sound around you and produce the *opposite* vibrations. What this does is then cancel out the ambient noise around you and make it a lot quieter.
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