brazeau
brazeau t1_j87gfdf wrote
Reply to Help with Staining by JayC0rn2020
It's probably not pine and is a hardwood that doesn't need conditioner. Are you sanding higher than 200 grit?
brazeau t1_j2e4xxq wrote
Reply to comment by Professional-Ad3441 in Eli5 How exactly does Noise cancellation work? That too in such small airbuds by Professional-Ad3441
It doesn't detect them as multiple frequencies until later, it just samples the incoming sounds and creates a digital version of the analog measurements. from the mic.
There's a thing called 'digital signal processing' which then can then analyze the digital signal and break it up into it's composite frequencies/magnitudes, average out the noise. The way the processing is handled will determine the quality of the end result.
Some cool things to learn about would in Nyquist Theorem, Fast Fourier Analysis, and Digital Signal Processing (FFT is part of this but deserves it's own mention).
brazeau t1_j2e3xei wrote
Reply to comment by theperfectmuse in Eli5 How exactly does Noise cancellation work? That too in such small airbuds by Professional-Ad3441
A speaker moves in and out to make pressure waves picked up by your eardrums. You can make a speaker that basically catches the incoming pressure waves.
If one speaker moved outwards, the opposite one would move inward.
brazeau t1_j8al2ke wrote
Reply to comment by JayC0rn2020 in Help with Staining by JayC0rn2020
Yeah 200 is high enough.