Patent ID: 11889284
Assignee: SOUND SOLUTIONS INTERNATIONAL CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 23:
24. The electroacoustic system according to claim 21, wherein the coil arrangement comprises four voice coils, of which two voice coils are electrically switched in parallel or in series and form a grouped voice coil, wherein the remaining voice coils form single voice coils and wherein the control circuit is connected to the two single voice coils and the grouped voice coil, the control circuit being further designed to:
measure position dependent velocities or back electromotive forces of said single voice coils and said grouped voice coil;
detect a difference of the measured position dependent velocities or back electromotive forces; and
generate output signals, which are fed to said single voice coils and said grouped voice coil and which counteract said difference.