Semi-active noise control system for an aircraft

A semi-active noise control system, comprising:

• a layer configured to be part of an interior panel of an aircraft;
• wherein the layer comprises:
• a plurality of conductive tracks;
• a driver arrangement;
• a plurality of tuned mass dampers;
• and
• a plurality of sensors;
• wherein each of the plurality of tuned mass dampers comprises an eigenfrequency that depends on a control signal applied to the tuned mass damper;
• wherein each of the plurality of tuned mass dampers is connected to the driver arrangement via at least one of the plurality of conductive tracks and is configured to receive control signals from the driver arrangement;
• wherein each of the plurality of sensors is connected to the driver arrangement via at least one of the plurality of conductive tracks;
• wherein each of the sensors is configured to sense vibrations and/or acoustic sounds and to send measurement signals to the driver arrangement;
• and
• wherein the driver arrangement is configured to analyze the measurement signals and to generate and send control signals to the tuned mass dampers such that the eigenfrequency of the tuned mass dampers is matched with the frequency of the vibrations and/or acoustic sounds sensed by the sensors.