铁路客运站定压广播音箱音量控制系统设计

Design of Volume Control System for Constant-voltage Broadcasting Speakers at Railway Passenger Stations

为了使目前铁路客运站广播系统能根据环境调整音量,采用信噪比自适应技术,设计定压广播音箱音量控制系统。提出音量控制系统要求,介绍音量控制系统架构、工作原理,设计音量控制器和上位机硬件和软件,并进行测试。测试结果表明,音量控制系统满足设计要求,能够实现音量自适应控制。

In order to make the broadcasting system used in railway passenger station adjust the volume adaptively according to the environment,the volume control system of constant-voltage broadcasting speaker is designed by adopting the adaptive technology of signal-to-noise ratio.The paper puts forward the requirements of volume control system,introduces the working principle and architecture of volume control system,the hardware and software of vol⁃ume controller and upper computer are designed,and the volume control system is tested.The test results show that the volume control system meets the design requirements and can realize adaptive volume control.