动圈扬声器功率压缩计算方法研究  

Research on Calculation Method of Power Compression of Moving-coil Loudspeakers

作　　者：吴志成[1] 沈勇[1] 王旭[1] 孙飞[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》2008年第11期24-26,共3页Audio Engineering

基　　金：国家自然科学基金(10774075)

摘　　要：介绍了动圈扬声器功率压缩的原理,提出了计算功率压缩的无热阻计算公式,在理论上研究了电学品质因数的温度漂移,对多个扬声器在不同输入功率条件进行了测量,实验表明理论和实测数据吻合。Theory of power compression of moving-coil loudspeaker is introduced. Calculation formula unrelated with thermal resistance is given to calculate the value of power compression of output sound pressure level. Excursion of electric quality factor with temperature rise is theoretically investigated. By practical measurements of several different loudspeakers at different input power levels, the method is verified to be identical with the measured data.

关 键 词：动圈扬声器 功率压缩 热效应 热阻 

分 类 号：TN643[电子电信—电路与系统]