PhD defence by Sophia Julia Feriani

Abstract

Environmental noise pollution in cities is a public health concern affecting a large portion of the urban population. This PhD thesis aims to establish a methodology to simulate noise propagation and analyze the impact of urban sound sources. For this purpose, a high-order accurate numerical method has been employed and developed: the nodal discontinuous Galerkin finite element method (DG-FEM). To simulate outdoor sound propagation in a spatially limited domain, one or more boundaries needs to act like the never-ending sky, so this work proposed a novel and stable way to absorb outgoing waves. Using this tool, urban acoustic scenarios were implemented and compared to acoustic measurements to validate the numerical method for outdoor acoustics. Finally, the effect of the wind, which can have a great impact on sound propagation, is included in the tool.

Supervisors

• Main supervisor: Associate Professor Cheol-Ho Joeng, DTU Electro, Technical University, Denmark
• Co-supervisor:  Associate Professor Allan Peter Engsig-Karup, DTU Compute, Technical University, Denmark
• Co-supervisor: Dr. Finnur Pind, CEO of Treble

External examiners

• Professor Gunilla Kreiss, Uppsala University, Sweden
• Professor Timothy Van Renterghem, Ghent University, Belgium

Chair of assessment committee

• Associate Professor Vicente Cutanda Henriquez, DTU Electro, Technical University, Denmark

Master of the Ceremony

• Associate professor Jonas Brunskog, Department of Electrical and Photonics Engineering, DTU