扩声是指在会议室等举行会议的重要场所，为放大讲话人声音而搭建的一套设备先进、性能可靠、功能齐全的扩声系统，是会议室建设的一个重要组成部分。扩声系统主要包含调音台、功放、话筒等设备。
... PA preamplifier 前置放大器 PA public address 扩声 Pace 步速，柳腰轻摆。然而内在的构造是一样的惟有一直学习实际，云朱紫也闹得太不象话了 ...
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Chapter four is about the necessity and feasibility of multichannel sound reinforcement, and the detailed analysis of how to realize 5.1 multi-channel sound reinforcement.
然后，文章分析了多声道扩声的必要性和可行性，并详细阐述了5.1多声道环绕声扩声实现方法。
参考来源 - 大型演播室5.1声道音频扩声系统设计·2,447,543篇论文数据，部分数据来源于NoteExpress
传统的教学扩声有什么弱点？
企业介绍往往要求扩声到一个大房间，通常有几个发言者对分散在整个礼堂。
Corporate presentations often require sound reinforcement to a large room, typically with several pairs of speakers scattered throughout the auditorium.
本厂的声频功率放大器、播音控制桌椅、调音台、大型音响扩声工程等相关产品在国内久负盛名。
The main products are audio power amplifiers, broadcasting controlled tables, large sound amplifying engineering, which is well know for a long time.
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