From the beginning of his higher education, Arthur joined an engineering school, INSA Lyon (National Institute of Applied Sciences of Lyon) with the idea of entering the Mechanical Engineering department. Indeed, the latter offers its final year students the possibility of doing a double degree with the Master Acoustics of Lyon. Arthur's long-standing interest in the world of acoustics was completely confirmed. An internship at the INRS (National Institute for Research and Safety) in Nancy in a laboratory of acoustics, where he worked on predicting the masked thresholds of hearing-paired listeners, allowed him to validate his mechanical engineering and acoustics master degrees. He thus acquired a taste for the world of research, and in particular for research on the hearing protection of workers. Continuing his career with a PhD seems to him to be the logical next step. Arthur thus came into contact with Jérémie Voix, professor at the École de Technologie Supérieure (ÉTS) in Montreal, who quickly became his thesis director. The subject of his doctoral thesis is the modelization of instrumented earmuffs for dosimetry and fit-testing applications. It will focus mainly on prototyping and modeling aspects.