3 ms·

Isn't noise cancellation a solved problem when using multiple microphones?

• jerryr 10y ago
  The Amazon echo has a pretty good microphone array, and it still has a hard time picking up my commands if there's background noise. And the background noise in factories is extreme. Notice that in the article's photos, the operator is wearing earplugs with Glass.
  • justin66 10y ago
    It should be a lot easier for a microphone that's right next to your head. Face one or more microphones away from the user, that gives you the environmental noise. Point one or more microphones at the user's mouth (or use some other method). That gives you what you need (signal much louder than the environmental noise, with the right microphone), along with some of that same noise. Apply some noise subtraction magic. It's actually pretty different than an Echo, which needs to pick out the user's commands via complex signal processing alone.
• hatsunearu 10y ago
  If your raw SNR is low, then you're boned no matter what.