现在对音响产物的重视程度不是很高，导致再视频会议过程中出现音响问题的概率很大。在这里，肖磊总结了视频会议在实践中遇到的音响问题，以便在出现问题时快速找到问题的原因。
Now the attention to audio products is not very high, which leads to the probability of audio problems in the process of video conference. Here, Xiao Lei summed up the audio problems encountered in the practice of video conference, in order to quickly find the cause of the problem.
1、通话时声音很轻
1. It's very quiet during the call
这主要表现在对方发出的声音很轻，需要非常有力才能听清楚对方在说什么。一般问题出在会议室音响设备的声音采集上。我们可以先测试自己的音箱或者音箱，用本地电脑进行播放测试，看看播放音量够不够大。如果确定我们的音响下行正常，基本可以判断问题出在上行，一般可以调整设备的输入(录音)音量。这需要特殊的签名，就是调节录音音量。其实很多人只是调节音箱的声音，并不知道录音音量的调节。
This is mainly reflected in the fact that the other party's voice is very light and needs to be very strong to hear what the other party is saying. The general problem lies in the sound collection of the audio equipment in the conference room. We can test our own speaker or speaker first, and use the local computer for playback test to see if the playback volume is large enough. If we make sure that our audio downlink is normal, we can basically judge that the problem lies in the uplink. Generally, we can adjust the input (recording) volume of the device. This requires a special signature, which is to adjust the recording volume. In fact, many people just adjust the sound of the speaker, do not know how to adjust the recording volume.
2、音响通话过程中噪音很大
2. There is a lot of noise during the audio call
对噪声水平有两个主要影响。一种是会议期间可能会有风扇、空调等噪声源，一般会议拾音产物不会有专门的噪声处理，导致噪声被拾取。二是音响在往上走，录音音量太大，导致轻微动作声音采集量大，产生噪音。当然，有时候会议软件里也有一些功能，比如降噪静音等。
There are two main effects on noise level. One is that there may be noise sources such as fans and air conditioners during the meeting, and the general meeting pickup products will not have special noise treatment, resulting in the noise being picked up. Second, the sound is going up, and the recording volume is too high, which leads to a large amount of light motion sound collection and noise. Of course, sometimes there are some functions in the conference software, such as noise reduction and mute.
3、你可以在视频会议中听到自己的声音
3. You can hear your voice in the video conference
视频会议的时候，发现可以听到自己的声音，再发回来。比如很多手机使用免提的时候，这种情况很容易发生。主要是音响设备没有选好。目前的视频会议软件虽然有回声的功能，但是没有一款能回声，所以需要后端的会议室音响设备来配合。如果条件有限，可以降低音响输入设备的灵敏度，增加拾音设备、扬声器和功放之间的空间距离，降低声音，通过距离效应改善回声。
In the video conference, I found that I could hear my voice and send it back. For example, when many mobile phones use hands-free, this situation is very easy to happen. The main reason is that the audio equipment is not well selected. Although the current video conference software has the function of echo cancellation, none of them can eliminate the echo, so it needs the back-end conference room audio equipment to cooperate. If the condition is limited, the sensitivity of audio input equipment can be reduced, the space distance between pickup equipment, loudspeaker and power amplifier can be increased, the sound can be reduced, and the echo can be improved through the distance effect.
