降低扬声器调制失真的方法研究  

Study of Methods for Reducing Modulation Distortion of Loudspeaker

作　　者：王雷[1] 沈勇[1] 

机构地区：[1]南京大学声学研究所近代声学教育部重点实验室,江苏南京210093

出　　处：《电声技术》2009年第12期25-27,32,共4页Audio Engineering

基　　金：国家自然科学基金(10774075)

摘　　要：作为评价扬声器单元非线性失真的重要指标之一,调制失真越来越引起研究者的重视;以驱动力因数Bl变化所引起的幅度调制失真(AMD)为主要研究目标,通过实际测量,进一步阐明了AMD大小、音圈初始位置及Bl分布三者之间的对应关系,并以此为依据对降低扬声器单元的调制失真给出了一些建议。As one of the most important indexes of evaluating nonlinear distortions of loudspeaker drivers, modulation distortion has drawn more and more attentions from researchers. Aimed at the AMD （Amplitude Modulation Distortion） of loudspeaker caused by the variation of driver motor factor Bl, the corresponding relations among AMD magnitude, initial position of voice coil and distribution of Bl are further demonstrated by practical measurements. According to that, several advices for reducing the modulation distortion of loudspeaker drivers are proposed.

关 键 词：扬声器 调制失真 驱动力因数 

分 类 号：TN643[电子电信—电路与系统]