Experimental Verifications and Simulations of Magnetic Motor of Circular Miniature Loudspeaker for Total Harmonic Distortion Improvement
The reduction in total harmonic distortion of miniature loudspeaker is reported by investigating the force factor (Bl(x)). Micro tensile testing is employed to get Bl(x) vs x curves, which verify finite element simulation. Furthermore, magnetic system of miniature loudspeaker is modified to obtain tailor made Bl(x) vs x curves. Based on it, prototypes are fabricated, which is followed by total harmonic distortion and sound pressure level measurements in an anechoic chamber. Measurements reveal a significant reduction in total harmonic distortion without affecting the sound pressure level.
Ford Lumban Gaol, Mehdi Roopaei, Svetlana Perry and Jessica Xu
S. J. Pawar et al., "Experimental Verifications and Simulations of Magnetic Motor of Circular Miniature Loudspeaker for Total Harmonic Distortion Improvement", Applied Mechanics and Materials, Vol. 87, pp. 136-139, 2011