4 ms·

I am curious about ANC as well. I used to wear headphones with ANC 8h+ a day and started to hear noise in my ear.

• ziml77 5y ago
  I don't see why that would happen. ANC plays an inverted signal to counter noises. It's not just perception that it makes sound quieter. When the original sound wave and counter sound wave collide they physically cancel out.
  • haneefmubarak 5y ago
    If im understanding GP correctly, I think what's happening for them is that the extended quiet daily makes their hearing a bit more sensitive (as their brain and ears work in tandem to amplify the sound and be more receptive to it, respectively). Now when they take off the headphones, since their hearing is more sensitive, they pick up more of the actual background noise that exists around them.
  • psd1 5y ago
    Right, that's the ideal case. What might happen is that you get incomplete cancellation that varies with frequency; so you might get higher sound pressure at certain frequencies.