3 ms·
Why is that btw? When I first heard of noise cancelling a few years ago, I figured electrons travel faster than sound waves (by a few orders of magnitude), so t
by Aachen 3y ago
Why is that btw? When I first heard of noise cancelling a few years ago, I figured electrons travel faster than sound waves (by a few orders of magnitude), so they'd just have a mic on the outside and speakers on the inside, amplifier in between and connect plus and minus the wrong way around to create an inverse signal. No chips with delay needed, just an analog signal going directly from mic to speaker. Shouldn't that cancel literally all sound?
Apparently they, instead, all use some software solution that mainly works for constant noises. I don't understand why
- LegitShady 3y agothe sound travels through the air, hits the microphone, gets transmitted to a cpu that creates an inverse signal, and is then transmitted to your ears. No matter what the cancellation signal is always later than received sound. The received sound arrives first. noises that don't change much have the most similarity between the sound from a couple milliseconds ago to the sound now, and so are most effective. But I will say my sony wf-1000xm3 do seem to do a pretty decent job muffling most noises.