Rockbox Development > Feature Ideas

Adjusting Volume via ambient noise on players with a mic

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phr:
Rather than adjusting the volume it would be much more interesting (though harder) to have noise cancellation in the software.  Basically the mic picks up the ambient noise and plays it out of phase through the earphones.  There would be some equalization tunable to the earphones, maybe with multiple profiles for different earphones.  I've wanted a feature like this for many years and suggested it on another board about 5 years ago, but got no comments on it.

saratoga:

--- Quote from: phr on November 23, 2013, 01:10:50 AM ---Rather than adjusting the volume it would be much more interesting (though harder) to have noise cancellation in the software. 

--- End quote ---

This has been suggested a few times, but its not possible without a microphone built into each ear phone. 

phr:
I think it can be done with just the mic in the player, since it only has to take out low frequencies (long wavelengths).  Some commercial noise cancelling headsets work like that, with a single mic.

saratoga:
Link to one?

phr:
Dunno about a link, but I used to have one and it's conceivable that I still have it, buried in a box someplace.  Don't expect me to find it anytime soon, but if it turns up I can send it to you.  Conceptually it's pretty simple: most of the energy is at the low frequencies, so taking out those is enough to make the environment feel calmer (e.g. if you are on a plane or something).  It wasn't great, but the fancier one I have now isn't great either.

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