pytness
pytness t1_j2f6xm5 wrote
Reply to comment by snoopervisor in Eli5 How exactly does Noise cancellation work? That too in such small airbuds by Professional-Ad3441
Adding*
pytness t1_j2f6ckg wrote
Reply to comment by Left__blank in Eli5 How exactly does Noise cancellation work? That too in such small airbuds by Professional-Ad3441
There is no need to analyze it.
Sound is a wave like this: ---^v---
Notice it goes normal, up, down, normal.
If the microphone gets up, it produces a down and the other way around like this: ---v^---
So if you sum the waves (what u hear) you get --------
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
-signalMost 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 mmWhich per each oscilation, sound travels less than 2 mm.