Nonlinear parameter estimation method for moving-coil loudspeaker system
Date Issued
2015
Date
2015
Author(s)
Huang, Chin-Kuo
Abstract
In this paper, we propose a nonlinear parameter estimation method for moving-coil loudspeaker system. The performance of moving-coil loudspeaker can be described by using analogous circuits. Second-order deferential equation is a good pattern to mold system directly and some important parameters of moving-coil loudspeaker compose coefficients in this model. In general, those coefficients are constant. However, it is hard to solve equation with coefficient becomes complex. We usually consider that force factor and stiffness cause nonlinear distortion. Hence, we compare data which are calculated from model with data measured effectively. Then, the curve of force factor and stiffness can be estimated with simulated annealing finally. We compensate input signal with estimated nonlinear parameters. It works that reducing total harmonic distortion of real loudspeaker.
Subjects
moving-coil loudspeaker
analogous circuits
nonlinear distortion
simulated annealing
Type
thesis
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