蜗牛式电喇叭膜片振动对声特性的影响研究  

STUDY ON ACOUSTIC CHARACTERISTIC OF HELICOID ELECTRIC HORN INFLUENCED BY THE HORN FILM VIBRATION

作　　者：叶郁文[1] 王振林[1] 潘钧俊[1] 吴初桢 

机构地区：[1]浙江大学机能学院力学系,杭州310027 [2]霞浦华盛机电有限公司,福建355101

出　　处：《振动与冲击》2001年第2期56-58,共3页Journal of Vibration and Shock

摘　　要：本文针对某公司提供的进口喇叭和同类研制品之间存在听感不同等使用性能指标上的差异 ,进行了理论计算和实验测试 ;根据计算和试验规律进行了对比分析 ,引入边界系数和折算系数的概念 ,揭示了两者具有不同声学指标的机理 ,最后提出了调节膜片边界系数获得喇叭优良声学特性的技术关键。Theoretical calculation and experimental work have been conducted in allusion to the difference of hearing sense caused by homemade horn and imported electric horn. By comparison and analysis of calculation and experiment, two new concepts-Boundary Coefficient and Conversion Coefficient are introduced, being able to explain the prime mechanism of the difference successfully. It is pointed out that regulating the proper Coefficient of Boundary is the pivotal technology to improve electric horn performance.

关 键 词：电喇叭 振动元件 声响测试 振动膜片 横向振动频率 边界系数 声学特性 

分 类 号：TN643[电子电信—电路与系统]