Audio zoom picks out a lone voice in the crowd

摘要

Professional 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.rnPhysicists Morgan Kjolerbakken 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.