Design of a multi-voice-coil all-digital loudspeaker

In this paper,a design of all-digital loudspeaker,consisting of USB Audio interface,identical-current switch and multi-voice-coil transducer,was proposed.The USB section transmits data from WAV file to the parallel ports of switch circuit which functions as a controller of voice-coil's current.The transducer converts electronic signals into voice.The results of test show that while sharing the same voice quality of analog's,the digital loudspeaker consumes less energy with a better antiinterfere ability,and thus proves that this design is a feasible one expecting a good application.