An active noise reduction system (2) comprising an electroacoustic plasma transducer (5) for mounting in an installation structure and an acoustic sensing system (11). The electroacoustic plasma transducer comprises a plasma electrode arrangement (6) including a collector electrode (8) and a corona electrode (9), and a control system (7) connected to the plasma electrode arrangement for supplying power to the plasma electrode arrangement. The control system comprises a controller (12), and a amplification circuit (13). The acoustic sensing system is connected to the control system providing a measurement signal of an environmental sound to control the output of the electroacoustic transducer for reducing noise. The control system comprises a filter implementing a control transfer function θ(ω) based on a model of the electroacoustic plasma transducer.
76829357
Alternative title(s) : (de) Plasmabasiertes rauschunterdrückungssystem (fr) Système de réduction de bruit basé sur plasma
TTO:6.2174
Patent number | Country code | Kind code | Date issued |
US11790881 | US | B2 | 2023-10-17 |
US2023020879 | US | A1 | 2023-01-19 |
EP4116967 | EP | A1 | 2023-01-11 |