Relationship between the nonlinear distortions compensation performance and each parameter of the electro-dynamic loudspeaker system

摘要

Loudspeaker systems generate nonlinear distortions due to their complex structures. The nonlinear distortions degrade the sound quality. A solution of this problem is to use Mirror filter. Mirror filter is used for the compensation of nonlinear distortions for electro-dynamic loudspeaker systems and is based on the nonlinear differential equations. The design of Mirror filter requires the estimated parameters of a target loudspeaker system. If you obtain the corresponding parameters of a target loudspeaker system and arrange Mirror filter designed using those parameters in front of the loudspeaker, then the nonlinear distortions can be compensated. Hence, the estimated parameters are very important to achieve high compensation performance. In this paper, we examine the relationship between the nonlinear distortions compensation performance and each parameter of the electro-dynamic loudspeaker system. Concretely, we clarify the effects by varying each nonlinear parameter in Mirror filter. Simulation and experimental results demonstrate that the compensation performance for the second order nonlinear distortions depends on a nonlinear parameter of the force factor in loudspeaker systems.