Rockbox General > Rockbox General Discussion

Crazy Idea: Noise cancelling RockBox

(1/3) > >>

keuleJ:
Hey guys, I had just a crazy idea:
Would it be possible to use the internal mic of certain targets (H1x0 etc.) to cancel background noise?
OK, maybe the distance between the mic and the headphones would be a problem.

See http://en.wikipedia.org/wiki/Noise-cancelling_headphones

Yotto:
Not to mention the fact that it's digital, so there is a (very small but still nonzero) processing time between recording and playing.  So the player would be canceling what happened 0.1 seconds ago, which would sound just odd.

keuleJ:

--- Quote from: Yotto on August 22, 2006, 04:10:26 AM ---Not to mention the fact that it's digital, so there is a (very small but still nonzero) processing time between recording and playing.  So the player would be canceling what happened 0.1 seconds ago, which would sound just odd.

--- End quote ---
Thats probably the reason why they say that the technique is good at cancelling continuous sounds (such as the humming onboard of a plane) and not so good at cancelling "sudden" sounds.

Jillorious:
Just remember: most internal mics in todays' DAPs pick up the hard drive whim every time the hard drive spins up, but is only audible in a recorded file, but while listening to music the whim doesn't get to your ear. Now, if noise-cancelation will be implemented, the software will constantly generate a 'noise cancelation sound wave' for the hard drive whim. Miserable.

Llorean:
Maybe disable noise-cancelling while the disk spins up, or at least attempt to identify what that sound is and dampen it somewhat? It's not like Rockbox doesn't know when the disk is going to spin. ;)

Navigation

[0] Message Index

[#] Next page