Topic: Separation of Aerodynamic Noise Sources and Sound Sources in Aeroacoustic Measurements

Speaker: Jérôme Antoni, University of Lyon

Time: Monday, August 29, 2022, 3:00-4:30 pm

Live Streaming Platform: Tencent Meeting

Conference ID: 778-122-679

Abstract:

Aerodynamic measurements are often polluted by high level of noise due to the presence of "hydrodynamic" noise, such as turbulent boundary layers, leading to negative signal-to-noise ratios. If not accounted for, hydrodynamic noise can easily jeopardize the identification of sound sources. This presentation will first review how the problem has been approached in the literature, and then will proceed with the introduction of a recent method, rooted on probabilistic grounds, that exploits the difference in the correlation structure of hydrodynamic and acoustic contributions, in order to separate them. This will be illustrated with in-flight measurements dedicated to acoustic imaging.

About the Speaker:

Jérôme Antoni received the M.S. degree in mechanical engineering from the University of Technology of Compiègne in 1995, and the Ph.D. degree in signal processing from the University of Grenoble in 2000. He currently holds a full professor position with the University of Lyon, Lyon, France. His current research interests include the development of signal processing methods in mechanical applications, covering vibration-based condition monitoring and the resolution of inverse problems in acoustics and vibration. His publications have been cited more than 16,000 times with an h-index of 50. Dr. Antoni served as a Handling Editor for the International Journal of Condition Monitoring, the International Journal of Rotating Machinery, and Diagnostika. He is currently with the Editorial Board of Mechanical Systems and Signal Processing and Applied Sciences.

School of Reliability and Systems Engineering