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

fYear

2014

fDate

4-9 May 2014

Firstpage

6697

Lastpage

6701

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing (ICASSP), 2014 IEEE International Conference on

Conference_Location

Florence

Type

conf

DOI

10.1109/ICASSP.2014.6854896

Filename

6854896