Rockbox General > Rockbox General Discussion

Crazy Idea: Noise cancelling RockBox

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Jillorious:
BTW (might be a bit off topic) if rockbox CAN identify the whim; wouldn't it be a good idea if it filtered it while recording, so that the resulting file is clean just as with an external mic?

Llorean:
I'm not so sure it could be done at anything remotely like a quality that would improve recordings. I imagine you'd just distort the sound behind it. Though I could hardly say for certain. In the context of noise cancelling though, it could certainly prevent a spike in the noise cancelling intended to remove a sound the user won't here.

saratoga:
I think you need to actually record sound hitting the ear itself, not just sound in the room since phase will be different if you're off by even a short distance.  You could probably do it on portables that had an external mic jack, but I don't see how you could make this work in general since i don't know of any headphones with a proper mic built into the ear piece.

Jillorious:

--- Quote from: saratoga on August 22, 2006, 08:17:54 PM ---I think you need to actually record sound hitting the ear itself, not just sound in the room since phase will be different if you're off by even a short distance.

--- End quote ---
Even for continuous noise?

JdGordon:

--- Quote from: Jillorious on August 22, 2006, 08:56:39 PM ---Even for continuous noise?
--- End quote ---
yes, for any sound...
the way sound moves is horrible physics, the difference 30cm can make is rediculous... it could be that the mic picks up noise that your ears dont hear because of the phase, or vice-cerse the mic could be missing the very annoying noise its supposed to be cancelling.

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