Title :
Equalization of excursion and current-dependent nonlinearities in loudspeakers
Author :
Payal, Shreyas Srikanth ; Mathews, V. John ; Iyer, Amrit ; Lambert, Russ ; Hutchings, Jeffrey
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Utah, Salt Lake City, UT, USA
Abstract :
This paper presents a novel equalizer for nonlinear distortions in direct-radiator loudspeakers in a closed cabinet by constructing an exact inverse of an electro-mechanical model of the loudspeaker. This exact inverse compensates for distortions introduced by excursion and current-dependent nonlin-earities. The equalizer compensates for the nonlinearities in the force factor, voice coil inductance, eddy currents and the stiffness of the loudspeaker. Simulation results demonstrating substantial reduction in the harmonic distortions at the output of the loudspeaker are included in this paper.
Keywords :
eddy currents; electromechanical effects; equalisers; harmonic distortion; loudspeakers; closed cabinet; current-dependent nonlinearities; direct-radiator loudspeakers; eddy currents; equalization; equalizer; exact inverse; force factor; harmonic distortions; loudspeaker electro-mechanical model; loudspeaker stiffness; nonlinear distortions; voice coil inductance; Adaptation models; Coils; Equalizers; Force; Harmonic distortion; Loudspeakers; System-on-chip; equalizers; loudspeakers; nonlinear distortion; nonlinear systems;
Conference_Titel :
Acoustics, Speech and Signal Processing (ICASSP), 2014 IEEE International Conference on
Conference_Location :
Florence
DOI :
10.1109/ICASSP.2014.6854896
