Application of analyzing methods for rotating sound sources for the development of quiet fans

• Applicant: Dr.-Ing. Gert Herold
• Subject Area: Acoustics ; Measurement Systems ; Fluid Mechanics
• Term: since 2024
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 541352386

This project aims to transfer new microphone array methods for the detection and characterization of rotating sound sources into practical applicability in an industrially used fan test rig. The main task is to develop a tool for evaluating the effectiveness of noise reduction measures and for identifying potential starting points for such measures. For this purpose, it is important to quantify occurring acoustic phenomena as precisely as possible with regard to their contribution to the generated sound field. The measurement system to be implemented is partly based on already established measurement methods (virtual rotating array), but significantly extends them by adaptability to the measurement environment and consideration of more complex sound propagation models. Furthermore, new methods for the separation of superimposed sound sources are put into practice.

• DFG Programme: Research Grants (Transfer Project)
• Application Partner: ebm-papst Mulfingen GmbH & Co. KG
• Co-Investigator: Professor Dr.-Ing. Ennes Sarradj