audio amplification meaning in English

音频放大器

Audio amplification circuit
声频放大电路
Besides this , conferencing systems , additional led displays , additional lcd desktop systems , audio amplification systems , digital recording , image processing systems , signal processing and conversion systems , and long distance control systems must all be integrated
除此以外，还有远程会议系统、 led辅助显示系统、桌面液晶辅助显示系统、音频扩声系统、数字录音系统、多画面图像处理系统、音视频信号处理切换系统、远程监控系统等组成。