Plasmabasiertes Rauschunterdrückungssystem

Details

Veröffentlichungs-Nr.

EP4116967

Aktenzeichen

EP21184056

Anmeldetag

6. Juli 2021

Veröffentlichung

23. April 2025

Erteilung

23. April 2025

Rechtsraum

EP

IPC

G10K11/178G10K15/06H04R23/00

Abstract

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.

Anmelder

Firma

Ecole Polytechnique Fédérale de Lausanne (EPFL)

Land

🇨🇭 Schweiz

Fachgebiete