There appear to be a number of ways to solve echo cancellation using software, and that is very interesting. But I was curious as to whether there was a good chip out there for solving this via hardware. I’ve been looking and I see some things that look like potential leads, but I’m eager to see the Community’s ideas here.
On the software side, if there is a really great solution that uses little resources. Feel free to share it here.
hardware wise, all you need it two directional(or one omni directional with one directional, catching what bounces off the wall behind) mics and reverse the phase - one pointing backword - one pointing foward, reverse the wires and have them on the same input - probably more complicated due to delay - but might be a start to prototype something - there was a simple experiment that you can setup with to xlr mics and just physically reversing the wires on one and hook them to the same input - sound that is picked up by both is canceled out.
some googling: http://mobiledevdesign.com/learning-resources/cancel-noise-your-mobile-phones-and-headphones
https://www.youtube.com/watch?v=A75Ubt3hk1g