CPC G10K 11/17853 (2018.01) | 26 Claims |
1. An active noise reduction system comprising an electroacoustic plasma transducer for mounting in an installation structure and an acoustic sensing system, the electroacoustic plasma transducer comprising a plasma electrode arrangement including a collector electrode and a corona electrode, and a control system connected to the plasma electrode arrangement for supplying power to the plasma electrode arrangement, the control system comprising a controller, and a amplification circuit, the acoustic sensing system connected to the control system providing a measurement signal of an environmental sound to control the output of the electroacoustic transducer for reducing noise, wherein the control system comprises a filter implementing a control transfer function θ(s) based on a model of the electroacoustic plasma transducer, said filter implementing said control transfer function θ(s) being further based on a frequency-dependent target acoustic impedance Ztg(ω).
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