Analysis of a Moving Magnet Miniature Transducer Array Loudspeaker System

A novel electromagnetic transducer speaker, that aims to employ whole body vibration of the panel to reduce the poor bass and impulse response associated with present flat panel speaker, have been tested and analyzed for the audible frequency range. Frequency response of a moving magnet configuration of this device shows consistent and linear output for various excitation current levels over the whole audible frequency range. Phase and magnitude measurement shows existence of resonance at the very low end i.e. below 1 kHz of the audio spectrum. Finite element modelling has been used to examine single transducer operation and the magnetic interaction between neighboring transducers in a matrix array format. Experimental results show the correct positioning of the transducers in a matrix configuration, as observed by the simulation, reduces the effects of interferences on the magnetic transducers. Also, results show that larger matrix array transducer speaker exhibit better low frequency response