2021/08/31 by Stanislav Sergeev, Sergeev, Stanislav, Thomas Humbert +5 · 1 citation
Engineering · #Acoustic Wave Phenomena Research #Aerosol Filtration and Electrostatic Precipitation #Applied Physics (physics.app-ph) #FOS: Physical sciences #Vibration Control and Rheological Fluids
paper · doi:10.48550/arxiv.2108.13866
openalex publication_date 2021/08/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In the majority of active sound absorbing systems, a conventional electrodynamic loudspeaker is used as a controlled source. However, particular situations may require an actuator that is more resistant to harsh environments, adjustable in shape, and lighter. In this work, a plasma-based electroacoustic actuator operating on the atmospheric corona discharge principle is used to achieve sound absorption in real-time. Two control strategies are introduced and tested for both normal in the impedance tube and grazing incidence in the flow duct. The performance of plasma-based active absorber is competitive with conventional passive technologies in terms of effective absorption bandwidth and low-frequency operation, however, it presents some inherent limitations that are discussed. The study reveals that the corona discharge technology is suitable for active noise control in ducts while offering flexibility in design, compactness, and versatility of the absorption frequency range.