I'm at work so I can't click those links but I tested my DX in my car with the AC on high, window rolled down, driving 60mph, with the stereo playing rap music pretty high.
I called my home answering machine with one of those variables and just kept adding them as I continued. I was shocked to find that no matter how much noise I kept adding I could consistently hear and understand all that was being spoken on my answering machine.
And unlike the demos I saw for noise cancellation on other phones on youtube for the Iphone 4 and others there was no waiting for the NC software to catch up and clear up. It was real real time and sounded pretty good for a call from a techno club in a wind tunnel flying through space.
