扬声器指向特性的新参数及其测量  

A New Parameter and Its Measurement of Directional Characteristic of Loudspeaker

作　　者：韩捷[1] 姜波[1] 

机构地区：[1]国家广播电视产品质量监督检验中心,北京100015

出　　处：《电声技术》2009年第12期43-45,49,共4页Audio Engineering

摘　　要：GB/T9396—1996《扬声器主要测量方法》将按照国际标准IEC60268-5:2007修订,新版标准在23章中增加了覆盖角。笔者对这些变化进行了解读,强调"辐射角"和"覆盖角"的区别,并用2种方法测量了扬声器指向性指数,从而说明新版标准中给出的用覆盖角计算指向性指数的方法简便易用。GB/T 939611996 ＂Methods of measurement for main characteristics of loudspeakers＂ will be revised according to international standard IEC 60268-5：2007. In Chapter 23, the coverage angel is increased in the latest edition. The main differences between radiation angle and coverage angle are given, and the loudspeak＇s directivity index is measured by two methods. The result shows that coverage angel will bring more convenience to calculate directivity index of loudspeaker.

关 键 词：扬声器 辐射角 覆盖角 指向性指数 

分 类 号：TN643[电子电信—电路与系统]