The two most important dimensions in hearing aid fitting are loudness perception and speech intelligibility. The goal for hearing aid fitting is to restore the ability to communicate. My belief: The goal in hearing aid fitting is to achieve normal loudness perception combined with high speech intelligibility in spatial situations with little hearing effort. To achieve this, I work with measurement methods, analyses and fitting concepts in the field of loudness, speech intelligibility, listening effort and spatial hearing.My stations in the Oldenburg (Germany) hearing research: - Physics at the University of Oldenburg- PhD in the field of "loudness-based hearing aid fitting".- Conclusion: "Important binaural broadband loudness parameters in the field of hearing aid fitting are not recorded in practice and cannot be derived from the audiogram. The trueLOUDNESS method developed here is suitable to determine the individual gain values for binaural broadband signals in a hearing aid and thus normalize the loudness perception."- Research associate in the field of "Personal Hearing Systems" at Fraunhofer IDMT.- Research projects and industry solutions: How do you adapt hearing aid algorithms in audio devices such as headphones, televisions or telephones to your individual hearing when no hearing care professional does the job? - Research and development department at HörTech, projects: "Loudness Optimized Gain Adaptation for Hearing Aids (LOGAN)". - In 2019, I joined the Marketing & Innovation team and head the "Products for Fitting Methods for Hearing Aids" division.- In October 2021, Hörzentrum Oldenburg and HörTech merged to form Hörzentrum Oldenburg gGmbH. Practical experience from hearing care professionals combines with new scientific measurement methods to improve hearing aid fitting!