MIT Mood Meter

MIT Mood Meter
Originally uploaded by ~db~

The MIT Mood Meter counts the number of smiles it can see in a large room, or indeed a whole community, and notes how long those smiles last over time. The Happiness Barometer on the left can be seen as a general measurement of the mood of that group of people. The visual feedback is meant to "raise awareness of how our own smiles can positively affect the surrounding environment".