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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。
Multimedia classroom audio-visual noise problems often affect the whole system sound effects and image quality, teaching process can not reflect the optimization. To ensure that the more “clean” power supply to the audio and video system; isolated from external noise generated by the interference noise; audio and video signal transmission system is properly connected to improve the anti-interference ability of the premise; the establishment of shielding systems and grounding network is to suppress electromagnetic noise The basic effective method.