摘要
多媒体教室视听噪声问题常常影响整个系统放声效果和图象质量,不能体现教学过程的最优化。确保较“干净”的电源向音视频系统供电;隔绝由外界噪声产生的干扰噪声;音视频系统的信号传输正确配接是提高线路的抗干扰能力前提;建立屏蔽系统和接地网络是抑制电磁噪声的基本有效方法。
The noise issue often impacts the whole effect of audio amplification and the quality of images of multimedia classroom, which can抰 reflect the most optimization of instructional process. In order to restraint electromagnetic noise, some steps should be taken, among which it is the most fundamentally effective method to establish shielding system and earth connection network.. It also works to isolate the interference noise produced by outside noise. As the same time, it functions to ensure to relatively 揷lean?power supply which can provide power-up to the audio and video system. The premise to improve the wiring抯 ability against interference is that the signals of the audio and video system can be transferred and attached correctly.
出处
《漳州师范学院学报（自然科学版）》
2001年第3期38-41,共4页
Journal of ZhangZhou Teachers College（Natural Science)
关键词
多媒体教室
噪声干扰
接地网络
multimedia classroom
noise interference
earth connection network
