摘要
本文以AT89S52单片机为控制核心,通过播音判断电路寻找广播间歇时段,实时采集噪声环境内的噪音信号,根据A/D转换后的噪音电平值计算出复杂环境下噪声信号的平均功率;根据噪声信号的功率大小自适应地控制大厅环境内的广播音量,实现了复杂噪声环境下自适应音量控制系统。该系统的硬、软件设计简单,性能良好,价格低廉。实验结果表明,该系统实现了预期功能,自适应效果良好,性价比较高,具有良好的推广价值。
An adaptive volume control AT89S52 MCU system based on noise collection is introduced. By looking for broadcasting intermittent period using the voice judge circuit, complicated noise signal at hall environment is sampled real-time. Through A / D conversion and calculation, the average power of noise signal can be measured. According to the average power of noise signal, an adaptive volume control system at complicated noise environment is designed. The design of hardware and software is simple and cost performance is good. Experimental results show that the whole system can adaptive adjusts volume according to the environment noise signal, and its engineering value is good.
出处
《电子测量技术》
2009年第4期94-96,107,共4页
Electronic Measurement Technology
基金
高等学校博士学科点专项科研基金资助(20070511017)
大学生国家级创新计划资助项目
