http://www.squarehead.no/index.htmlhttp://www.wired.com/gadgetlab/2010/10/super-microphone-picks-out-single-voice-in-a-crowded-stadium/You’re filming a sports game. An argument breaks out between players, and you zoom in to get a closeup of the action. The crowd goes wild, shouting and booing. Now, you zoom the audio in to hear what the players are saying to each other, despite the din. Impossible? Not with Squarehead’s Audioscope.
Squarehead’s new system is like bullet-time for sound. 325 microphones sit in a carbon-fiber disk above the stadium, and a wide-angle camera looks down on the scene from the center of this disk. All the operator has to do is pinpoint a spot on the court or field using the screen, and the Audioscope works out how far that spot is from each of the mics, corrects for delay and then synchronizes the audio from all 315 of them.
http://www.newscientist.com/article/dn19541-audio-zoom-picks-out-lone-voice-in-the-crowd.html?DCMP=OTC-rss&nsref=online-newsProfessional footballers beware: the argument you are having with your coach could soon be overheard even within the cacophony of a packed stadium. A new microphone system allows broadcasters to zoom in on sounds as well as sights, to pick out a single conversation.
Physicists Morgan Kjølerbakken and Vibeke Jahr, formerly at the University of Oslo, Norway, were working on sonar technology when they came up with the idea for what they call a supermicrophone, now dubbed the AudioScope. The device is made up of around 300 microphones arranged in a fixed circular array above the sports ground. They are used in conjunction with a wide-angle camera that can zoom in to any position on the pitch. Because the camera is also fixed, it can be calibrated to zoom in to any location within its range.
Topic: Super-Microphone Picks Out Single Voice in a Crowded Stadium (Read 1760 times)