Plasma based noise reduction system
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 |