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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、通話時聲音很輕

1. It's very quiet during the call

這主要表現(xiàn)在對方發(fā)出的聲音很輕，需要非常有力才能聽清楚對方在說什么。一般問題出在會議室音響設(shè)備的聲音采集上。我們可以先測試自己的音箱或者音箱，用本地電腦進行播放測試，看看播放音量夠不夠大。如果確定我們的音響下行正常，基本可以判斷問題出在上行，一般可以調(diào)整設(shè)備的輸入(錄音)音量。這需要特殊的簽名，就是調(diào)節(jié)錄音音量。其實很多人只是調(diào)節(jié)音箱的聲音，并不知道錄音音量的調(diào)節(jié)。

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、音響通話過程中噪音很大

2. There is a lot of noise during the audio call

對噪聲水平有兩個主要影響。一種是會議期間可能會有風(fēng)扇、空調(diào)等噪聲源，一般會議拾音產(chǎn)品不會有專門的噪聲處理，導(dǎo)致噪聲被拾取。二是音響在往上走，錄音音量太大，導(dǎo)致輕微動作聲音采集量大，產(chǎn)生噪音。當(dāng)然，有時候會議軟件里也有一些功能，比如降噪靜音等。

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、你可以在視頻會議中聽到自己的聲音

3. You can hear your voice in the video conference

視頻會議的時候，發(fā)現(xiàn)可以聽到自己的聲音，再發(fā)回來。比如很多手機使用免提的時候，這種情況很容易發(fā)生。主要是音響設(shè)備沒有選好。目前的視頻會議軟件雖然有回聲的功能，但是沒有一款能回聲，所以需要后端的會議室音響設(shè)備來配合。如果條件有限，可以降低音響輸入設(shè)備的靈敏度，增加拾音設(shè)備、揚聲器和功放之間的空間距離，降低聲音，通過距離效應(yīng)改善回聲。

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.