ELECTRIC ROCKING MODE DAMPER

摘要

The electroacoustic transducer relates to a new audio transducer for mobile devices, in particular a micro speaker for use in mobile phones, tablets,gaming devices, notebooks or similar devices, that comprises two figure-8 shaped coils to compensate tumbling passively or to detect and compensate actively rocking modes of the membrane along the two axes perpendicular to the axis of piston-wise movement of the membrane using a detection coil (9) and a damping coil (12) per axis. An amplifier may be used to amplify the detection signal in order to increase the damping effect. Electrical rocking mode compensation replaces state of the art damping mechanisms which are based on damping materials added in the moving part of the membrane. Due to the independence of environmental conditions electrical damping outperforms existing damping techniques.