Frederik Rietdijk is an industrial doctoral student at the division of Applied Acoustics. He is employed by the Swiss federal institute Empa, where he works at the Laboratory for Acoustics / Noise Control. Frederik's research is part of the SONORUS project. The goal of his research is to develop a tool to auralise aircraft noise in an urban environment which, in a second phase, can be used to determine better indicators for annoyance and sleep disturbance due to aircraft noise. An important topic in his research is the influence of atmospheric turbulence.