高音、微型及号筒扬声器单元的大信号性能  

Large Signal Performance of Tweeter,Micro and Horn Loudspeaker

作　　者：Wolfgang Klippel 王富裕 

机构地区：[1]Klippel GmbH [2]Tymphany China迪芬尼中国惠州超声音响有限公司,广东惠州516223

出　　处：《电声技术》2009年第10期20-23,共4页Audio Engineering

摘　　要：高频信号专用扬声器可能产生明显的声学输出失真。磁路策动力和悬吊的非线性可用等效电路来建立模型,也可用基于电压和电流监测的系统识别技术动态地测量。被认可的模型是大信号性能数值预报的基础,同时该模型也揭示出每个非线性的影响。将该技术用于3个不同单元的诊断,比较了测量的和预报的失真,研究了热功率压缩并讨论了对感知音质的影响。Loudspeaker dedicated to high-frequency signals may also produce significant distortion in the acoustical output. The nonlinearities in motor and suspension can be modeled by equivalent circuits and dynamically measured by system identification technique based voltage and current monitoring. The indentified model is the basis for numerical prediction of the large signal performance and reveals the effect of each nonlinearity. The paper uses this technique for the diagnosis of three different drivers, compares measured and predicted distortion, investigates the thermal power compression and discusses the impact on the perceived sound quality.

关 键 词：号筒扬声器 热功率压缩 失真 

分 类 号：TN643[电子电信—电路与系统]