He has a background in speech research in both industrial and academic research environments. Since 2001, he has been a professor of communications engineering at Paderborn University, Germany. His research interests are in the fields of statistical signal processing and pattern recognition, with applications to speech enhancement, acoustic beamforming and source separation as well as automatic speech recognition and unsupervised learning from speech and audio. He has coauthored more than 200 scientific publications including Robust Automatic Speech Recognition—A Bridge to Practical Applications (Academic Press, 2015). He is a fellow of the International Speech Communication Association.