On March 11 2019, Audio Analysis Lab member Mathew Shaji Kavalekalam successfully defended his Ph.D. thesis entitled ” Model-based Speech Enhancement for Hearing aids”. The Ph.D. assessment committee was comprised of Professor Rainer Martin, Ruhr-Universität Bochum, Institut für kommunikationsakustik , Senior Research Scientist Emmanuel Vincent, Inria Nancy – Grand Est , and Associate professor Thomas Arildsen, Aalborg University, Department of Electronics Systems. Mathew was supervised by Professor Mads Græsbøll Christensen with Research Manager Jesper Boldt, GN Hearing A/S, and Assistant Prof. Jesper Kjær Nielsen.