title: Active Noise Cancellation through default iPhone headphone
body: <p>We want to create an App that will implement the Active Noise Cancellation using the default iPhone headphone. That is, to receive the external audio using the iPhone headphone Mic and make a phase shift of 180 degree. Finally, to play the inverted sound through default headphone speaker to cancel the external sound(Active noise cancellation).</p>
  
  <p>Ref: <a href="http://electronics.howstuffworks.com/gadgets/audio-music/noise-canceling-headphone.htm">http://electronics.howstuffworks.com/gadgets/audio-music/noise-canceling-headphone.htm</a></p>
  
  <p>Can this be feasible with the iPhone App?</p>