Most hearing people can't understand sign language. A team of students from the Ukraine built a set of electronic gloves to help bridge that gap. A set of sensors in these gloves, including an accelerometer, compass, gyroscope and flex sensors in the fingers, translate movement into signals that a computer converts into speech.
The person wearing the gloves draws a shape in the air. That information is transmitted them via Bluetooth to a smartphone, which matches the shape up against a set stored in memory. A match produces a sound. For example, waving one's hands in one pattern produces "nice to meet you" and another pattern produces "system really works."
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