谈室外广播电声部分的设计

Design of electric sound of outdoor-broadcast

结合工程实际,介绍了室外广播系统中电声部分设计方法,提出了一种音箱体的制作方法,通过分析不同功放机的特点,提出了目前适合室外广播的功放机电路形式。将声学原理与电学原理结合起来,提出了一种根据空间声压级确定输入到音箱中的电功率大小的计算方法。通过对实际测试数据与计算结果对比,证明本文提出的计算方法对实际工程有很好的指导意义,通过到现场试听,音响效果令人非常满意。

Combined with practice, this paper introduced a design method of electric sound of outdoor-broadcast,and present a method of sound-box manufacture. By analyzing the different point of sound power amplifier, a circuit form adapting to outdoor-broadcast was presented. By Combining acoustics with electrics, and based on sound pressure level a calculating method was presented to determine the magnititude of electric-power inputting to sound-box. The site testing data have a good agreedment with theorectical calculating value, and site andition showed that the sound effect is satisfying. The design methods indroduced in this paper could be refferenced in engineering practice.