TheBigDino Posted January 16, 2005 Share Posted January 16, 2005 Hello People!! Please Help!! I've just came up with an idea of making a noise cancelling application and I've no idea where to start. Basically (Well, it probably quite hard to do), what I want to do is, retrieve input from the microphone IN and inverse the wave of the input (Mic) and play it back to the speaker so that it could cancel out the noise from the surroundings of my Headphones(Speakers). Any Ideas? Also, Could somebody tell me if this is right, if inversing the wave really does cancel out the noise? Link to comment Share on other sites More sharing options...
Sayonara Posted January 16, 2005 Share Posted January 16, 2005 Yes, it's possible; you can buy headphones that do that. Link to comment Share on other sites More sharing options...
TheBigDino Posted January 16, 2005 Author Share Posted January 16, 2005 Yea, I know, there are also circuits out there that does it as well. But to keep the cost down I just thought it would be a good idea if a COMPUTER did it. Link to comment Share on other sites More sharing options...
5614 Posted January 16, 2005 Share Posted January 16, 2005 with headphones i think a critical thing to remember is the size of it.... you cant walk around with a computer balancing on your head. as sayo said these already exist, what many commercial companies do is buy one of these, take it apart to understand it and then to a degree copy it, with what they class as improvements and modifications. Link to comment Share on other sites More sharing options...
Dave Posted January 17, 2005 Share Posted January 17, 2005 I'm pretty sure you can buy little IC chips that have a mono input for a mic amd output for a stereo. Haven't found any yet though. Link to comment Share on other sites More sharing options...
YT2095 Posted January 17, 2005 Share Posted January 17, 2005 noise canceling Microphones are in use on most pilot headsets and some posh Ham Radio gear, it`s been out for some while now, and there is an analogue way to accomplish this effect, the use of companders is also popular, but mostly on stage mics. Link to comment Share on other sites More sharing options...
ed84c Posted January 17, 2005 Share Posted January 17, 2005 I was just about to post this thread myself actually. They are in commercial use now for road works etc. Mabye doing a google for Road Works sound cancellation?. Also is it possible to cancel the noise by just replaying the noise exactly one half wave later than the sound, or would this only work if it is menotonous? Link to comment Share on other sites More sharing options...
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