Borys Kowalewski is a research engineer at WSAudiology/Widex. He holds an MSc in Acoustics from Adam Mickiewicz University in Poznan, Poland and a PhD in Hearing Science from the Technical University of Denmark (DTU). Prior to joining WSAudiology in 2019, he worked as a Post Doc in DTU Hearing Systems. His PhD and Post Doc work focused on modeling the effects of hearings loss and hearing-aid compensation on the basic aspects of auditory perception, investigating the effects of dynamic-range compression on the perception of speech, and developing novel signal-processing strategies for hearing-assistive devices. Currently, his main focus is on improving hearing-aid fitting and sound quality, but his broader interests include psychoacoustics, computational modeling, auditory signal processing and speech intelligibility.