Sensaris has developed a sensor that you can wear on your arm that is able to determine in real time what the noise and air quality is like in a certain area.  The way that the device is able to broadcast the noise and air quality in real time is by utilizing a Bluetooth connection which links up to your cellphone.  The first place that this device will be launched in is Paris, France.  No word on when or if this device will arrive in the U.S.

[via RWW]