pytness t1_j2f90wd wrote
Reply to comment by Left__blank in Eli5 How exactly does Noise cancellation work? That too in such small airbuds by Professional-Ad3441
I mean, yeah, but its just -signal
Most speakers go up to 20K hertz, which mean it vibrates up to 20000 a second, if you do the math 1 second / 20000 hertz * 340 (sound speed in meters per sec) = 1.7 mm
Which per each oscilation, sound travels less than 2 mm.
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