these details of the conference audio greatly affects the quality of the conference

　　Not paying attention to these details of the conference audio greatly affects the quality of the conference

　　In the process of using the conference system, problems such as large noise, dynamic howling, dynamic proportional imbalance, light interference, power interference, etc. appear, often due to poor early debugging or punctual maintenance. Let us analyze the reasons for these problems.

　　1. The conference sound system is noisy. Because the gain is too large, the automatic gain control method is selected, the impedance is not matched, etc., the noise floor will appear. It affects the clarity, softness and brightness of the dynamics, and will cover up the dynamics of the venue when it is severe.

　　2. Dynamic whistling of conference audio system. The principle is that the dynamics of the speaker are fed to the microphone, so that a positive feedback circuit is formed between the speaker and the microphone. The cause of howling is mainly caused by the unreasonable placement of the microphone and the speaker in the layout of the conference room.

　　3. The dynamic proportion of the conference audio system is out of balance. If the dynamic ratio between the main control room, the main venue, and the speaking branch venue is imbalanced, it will affect the balance of the long-distance rehabilitation of other branch venues, resulting in a decline in the overall effect of the meeting.

　　4. Lighting interference of the conference audio system. If the ballast method is used for the lighting lamp that is initiated intermittently in the venue, high-frequency radiation will occur when the lamp is ignited, and it will be stringed in through the microphone and its lead, showing a "click" sound; the microphone line will be too close to the lamp line. Presents a "squeak" sound.

　　5. Power interference of conference audio system. Poor grounding of the power supply, poor grounding contact and impedance mismatch between the equipment, and the power supply of the equipment without "purification" treatment, etc., will cause clutter interference to the audio signal, forming a low-frequency AC "buzzing" sound.

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