Long Hoffmann, M. Sc.

Research Staff Profile

• Research Topic - Vibration and noise calculation for electric motors with a focus on the housing
  What is your research topic and what is it about?

  My research focuses on the acoustic prediction of noises generated by electrical machines, with a special focus on the influence of the housing on their noise behavior. Electrical machines, such as electric motors or generators, can generate noise during operation. These noises are mainly caused by electromagnetic and mechanical forces acting on the structures of the machine. A crucial aspect that is often overlooked is the machine's housing. It plays an essential role in how vibrations propagate and are ultimately perceived as noise. In my research, I develop models and methods to investigate the acoustic influence of housings in electrical machines. The aim is to analyze and understand both the source noises within the machine and the interaction of these noises with the housing.

  Why is your topic relevant?

  The relevance of my research topic stems from several aspects. In a world that places increasing emphasis on sustainability and quality of life, noise protection plays a central role. Noise emissions from electrical machines contribute significantly to noise pollution in urban and industrial areas. Accurate prediction and targeted reduction of these noises can significantly reduce noise pollution, which has a positive impact on human health and well-being.

  Targeted improvement of noise behavior also has technical advantages. Reducing vibrations can increase the service life and reliability of electrical machines by preventing unnecessary wear and material fatigue. My research therefore also contributes to the development of durable and efficient technological solutions.