摘要
电动式扬声器单元支撑系统的蠕变效应表现在扬声器单元的位移在共振频率以下会有所上升。因此在扬声器单元线性集中参数模型中仅仅用线性弹簧并联简单的粘滞阻尼来代表支撑系统是不够的。在此引入对数蠕变模型,通过测量实际的扬声器单元与传统的线性模型进行对比,结果表明对数蠕变模型与实际测量结果更吻合。
Creep effect of electrodynamic loudspeaker suspension can be observed as an increase in displacement far below the resonance frequency. The creep effect means that the suspension cannot be modeled as a linear spring with simple viscous damping in parallel. The creep effect is investigated and the creeping displacement response dependent on the step - like excitation voltage is measured on several real loudspeakers. The LOG creep model （two versions） is introduced here, replacing the simple linear compliance with a dynamic transfer function in the traditional linear low - frequency loudspeaker model. Experiments on real loudspeakers demonstrate that the expanded model is able to fit the measured frequency much better than the traditional model.
出处
《电声技术》
2011年第11期21-24,29,共5页
Audio Engineering
