Ulf Rutger Tengzelius is a researcher and CEO at Aurskall Akustik AB. He received his M.Sc. in Engineering Physics at KTH 1986, specialised in applied mechanics. Starting out in the field of underwater acoustics, he has broad experience in structural dynamics, as well as in environmental acoustics. Over the last decade, he has mainly worked with research and methods related to artillery and aircraft noise generation, propagation, and exposure and impact. This work has been carried out at the Swedish Defence Research Agency (FOI) until 2015, at KTH 2015–17, at Chalmers Industriteknik 2017–19, and at Aurskall Akustik AB from 2019. The main focus has been on the development of more accurate, faster ,and user-friendly methods with a holistic approach. Ulf was the Swedish research center's representative in the CEAS (Council of European Aerospace Societies) Aeroacoustics Specialists Committee until leaving FOI in 2015.