利用线性扫频信号测量扬声器电声特性

Determination Of the Electroacoustic Characteristics of Loudspeakers By Using Linear Sweep Signal

介绍利用线性扫频信号测量扬声器系统的频响特性与指向性,由配备专用声卡的笔记本电脑直接产生与接收声信号。与传统的利用模拟信号进行测量的方法相比,该方法最大的优点在于:通过一次测量可以得到所有需要的信息,从而方便地得到扬声器的电声特性。实验结果证明,该方法简便有效,并有相当的精度,具有实际应用价值。

A new method is described, which introduces linear sweep to determine the electroacoustic qualities of loudspeakers, such as frequency response and directivity of loudersperkers. Compared with traditional measurements,the new method is less time-consuming and more convenient. All imformation needed for further calculation of electroacoustic qualities of loudspeakers can be obtained after one excitation. Experimental results show that the new method is worthy to use.