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Crazy Idea: Noise cancelling RockBox

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amar:
Or even (if the phase is completely out and I remember my physics) amplify the annoying noise

saratoga:

--- Quote from: Jillorious on August 22, 2006, 08:56:39 PM ---
--- 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?

--- End quote ---

Imagine a 1KHz continuous tone.  Wavelength is (330m/s)/1000Hz.  To avoid amplifing the noise, you need to be within 1/2 that distance just to break even.  To get any real benefit, you probably want to be within 1/10.  So the worst you'd want is 3.3cm from the inside of your ear.  And realistically, even that isn't going to work very well.

Jillorious:
TYVM for clarifying matters. ::)

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