The Independent's journalism is supported by our readers. When you purchase through links on our site, we may earn commission.

Doppler effect: Could it be the future of computer navigation?

Microsoft had originally developed the concept for its Kinect technology

Jamie Campbell
Tuesday 24 March 2015 15:35 GMT
Comments
Microsoft's Xbox 360 is equipped with a Kinect motion-sensing controller
Microsoft's Xbox 360 is equipped with a Kinect motion-sensing controller

A computer science student has used the famous Doppler effect to control a computer using only hand gestures, making a website that allows you to try it out.

The Doppler effect, named after Austrian physicist Christian Doppler who proposed the theory in 1842, is a well-documented phenomenon in physics that causes a change in the frequency of a wave as the source moves closer to the observer.

The idea of using the Doppler effect to interact with your computer using just a microphone and speakers was originally explored by a Microsoft research team in in 2012.

The technique itself is fairly simple: an inaudible, high-frequency tone is emitted by your speakers. When the soundwave reflects off moving objects (your hand), the frequency shift is interpreted by the microphone and recognised as a gesture by the computer.

The Microsoft team were successful in using a wide range of gestures that included scrolling, taps, pinches and rotation. However, the science was never really seen as anything more than a supporting act for the company’s Kinect sensor, which uses camera technology to detect movements.

Rapp read the Microsoft research paper and set out to replicate the results. He has now built a webpage with a number of Doppler demos embedded.

So long as you have a working microphone and speakers in your laptop, and you’re running Google Chrome, you can scroll up and down the page, play a Theramin or just watch the computer track you waving your hands around.

Join our commenting forum

Join thought-provoking conversations, follow other Independent readers and see their replies

Comments

Thank you for registering

Please refresh the page or navigate to another page on the site to be automatically logged inPlease refresh your browser to be logged in