SoundWave: Using the Doppler Effect to Sense Gestures for Computer Interaction

Gestures are becoming an increasingly popular means of interacting with electronics and computers, but it is still relatively costly to deploy robust gesture-recognition sensors in existing mobile platforms. Developed by a project team at Microsoft Research, SoundWave is a real-time sensing technique that leverages a speaker and a microphone already embedded in most devices to robustly sense in-air gestures and motion around a device. It is capable of detecting a variety of gestures, and can directly control existing applications without requiring a user to wear any special sensors.