"We have a little sensor that sits on your cheek and picks up the vibrations when you speak. We have two microphones that are built into this little feature here in the headset that are scanning your background environment 800 times a second. And so what that does is…it tells us exactly when you're speaking and we know exactly what the noise is. When you know those two pieces of information you can improve any audio application in mobile environments. So the first thing we do is we take out, subtract all the background noise from the cell phone call. We also adjust the incoming volume based on what we know of your environmental surroundings. Based on what we know about the background noise, we can adjust it up or down automatically to accommodate for the different types of noises." The technology works….but it also puts the price of the Jawbone at the high end for non-stereo Bluetooth headsets. It is sold exclusively by Cingular…now AT&T for about 120 dollars. The performance and design have made it a bit tough to find. Bloomberg Boot Camp, I'm Fred Fishkin.