Active acoustic control system and method

A method of controlling an acoustic signal propagating along a propagation path, the method comprising:

• receiving first information related to the acoustic signal propagating along the propagation path from a first sensor arrangement;
• receiving second information from a second sensor arrangement for sensing a residual error signal along the propagation path;
• separating a transmitted component and a reflected component from a total acoustic pressure of the acoustic signal propagating along the propagation path using the first information, the second information, and a wave separation method;
• and
• generating a control signal for controlling the acoustic signal based on the first information from the first sensor arrangement, the second information from the second sensor arrangement, the transmitted component, and the reflected component by independently controlling
• a first control source arrangement for generating a first control signal for controlling a first component of the acoustic signal, and
• a second control source arrangement for generating a second control signal for controlling a second component of the acoustic signal.

An active acoustic control system for controlling an acoustic signal propagating along a propagation path, the system comprising an active control unit configured to:

• receive first information from a first sensor arrangement, the first information related to the acoustic signal propagating along the propagation path;
• receive second information from a second sensor arrangement for sensing a residual error signal along the propagation path;
• separate a transmitted component and a reflected component from a total acoustic pressure of the acoustic signal propagating along the propagation path using the first information, the second information, and a wave separation method;
• and
• controlling the acoustic signal based on the first information from the first sensor arrangement, the second information from the second sensor arrangement, the transmitted component, and the reflected component by being arranged to independently control
• a first control source arrangement for generating a first control signal to control a first component of the acoustic signal, and
• a second control source arrangement for generating a second control signal to control a second component of the acoustic signal;
• wherein the active control unit includes
• a first controller arranged to control the first control source arrangement, and
• a second controller arranged to control the second control source arrangement.