Per Sjösten has been working for more than 30 years in acoustics and music production. In 2003, he received a PhD in Applied Acoustics with the thesis Active Noise Control Of Enclosed Sound Fields, after years of research at Chalmers, Göteborg and Blekinge University of Technology. He is now working as an acoustic consultant in room acoustics and music recording. Per was a founding member of USIT and is the chairperson for the Swedish section of the Audio Engineering Society.