Viewing a single comment thread. View all comments

plantito101 t1_j2cupft wrote

If it's cancelling the noise, it is it still considered a sound that is received by your ears?

I thought it was a frequency that our ears can't pick up.

2

DanielEnots t1_j2daq3s wrote

Basically, if you're hearing 1hz sound then once per second the sounds wave goes up and down for a full cycle. To "cancel" it you play a sound that goes down and then up so that you get +1 from outside and -1 front the headphones. And you end up with 0 when you add them.

It's like how I gimbal moves the camera in the opposite direction so even though the person holding it is moving when you add the gimbal movement the camera stays still. There's effectively no sound from outside hitting your ear drum (in a perfect world where it is 100%)

5

snoopervisor t1_j2dk0hh wrote

Sound is air pressure changes. The canceling means the pressure is flattened. It's substracting two sound waves.

2