Solenoid actuator for loudspeaker application

A novel loudspeaker design has been proposed that employs hundreds of micro transducers producing small displacements within the audible frequency range. The feasibility of employing a solenoid actuator as the loudspeaker transducer has been studied and discussed in this paper. Compared to its counterpart, voice coil motor, a solenoid actuator exhibits very non-linear behaviour. The theoretical description along with practical test on a commercial solenoid actuator reveals the limitations of solenoid operation at high acceleration and current.