One of the less “sexy” specs/features of the Nexus One is the existence of a 2nd microphone that allows for active voice cancellation. Basically, when you’re in places where there may be a lot of background noise it helps isolate your voice and more clearly transfer THAT voice information to the other end.
First and foremost your phone is a phone so while this improvement isn’t as noticeable in the grand scheme of things that is actually a GOOD thing. You (and the person you’re talking to) tend to only notice sound quality when the quality is poor and someone is complaining. That won’t often be the case with the Nexus One.
The amazing voice quality comes courtesy of the Audience A1026 Voice Processor. The company has modeled their processor based on how the actual human ear works and you can watch a video about this, although I’ll warn you its probably over your head.
I know you’re smart and all, I’m just saying.
They also allow you to listen to different scenarios with and without the Audience Processor to illustrate how the company improves your experience. This isn’t likely to pitch any tents but it’ll make your overall voice experience better… now its time to work on that 3G connectivity.