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Machine acoustics at TU Darmstadt - history, present topics, and future developments

: Bös, Joachim; Storm, Rainer; Hanselka, Holger

International Institute of Noise Control Engineering -INCE-:
Noise control for quality of life. 42nd International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2013. Vol.5 : 15 - 18 September 2013, Innsbruck, Austria
Red Hook, NY: Curran, 2014
ISBN: 978-1-63266-267-5
International Congress and Exposition on Noise Control Engineering (Inter-Noise) <42, 2013, Innsbruck>
Conference Paper
Fraunhofer LBF ()
machine acoustic; machinery noise; engineering noise control

This paper will start with an overview of the historical development of the research and science of machine acoustics at Technische Universität Darmstadt, Germany, in the 1960s, 1970s, and 1980s. Back then the physical noise generation mechanisms of gears, gearings, and axial piston pumps were thoroughly investigated and analyzed for the first time, the "fundamental equation of machine acoustics" was developed, and measures for engineering noise control "at the source" were derived. In addition, the paper will present some recent examples and project results from current research projects. Finally, some trends for research activities in the future will be pointed out. These include the numerical simulation and experimental measurement of vibrational energy flow in solid structures, the increasing use of active methods, the combination of machine acoustics and psychoacoustics (What makes a machine noise more pleasant? How can a good and recognizable product sound or even a brand sound be generated? How can psychoacoustic metrics be incorporated into active control concepts? …), and the combination of methods for reliability assessment and machine acoustics (structure and damage monitoring, reproducibility of acoustic measurement results, quality control by means of acoustic emission measurements, etc.).