現實使用中，我們會發現有的廣播系統是電聲悅耳、自然流暢，但是有一些則帶有些噪音、嘯叫。面對這種情況，我們該如何處理呢？
山東公共廣播音響廠家為您解答。
In actual use, we will find that some broadcasting systems are pleasant and natural, but some are noisy and howling. How should we deal with this situation? Shandong public broadcasting audio manufacturer will answer for you.
先排除外部因素：
Exclude external factors first:
引起電流聲或者噪聲問題，外部原因無非，只有三個，外部音源設備、現場壞境噪聲過大和系統供電有問題。我們一個個去排除，先把外部音源取下來，再把現場打開的麥克風全部關掉，隔斷現場環境噪音的拾取，然后再去確認這一路電源有沒有跟其他大型的用電系統共用一路電源。因為如果與其他大型的用電系統共用一路電源，它的使用會大大影響電流的變化，因此產生電流聲。
There are only three external causes that cause current sound or noise problems: external sound source equipment, excessive environmental noise on site and system power supply problems. We will remove the external sound source one by one, then turn off all the microphones on the site to cut off the pick-up of the environmental noise on the site, and then confirm whether this power supply shares the same power supply with other large power systems. Because if it shares a power supply with other large power systems, its use will greatly affect the change of current, so it will produce current sound.
逐步排除內部系統各種問題：
Gradually eliminate various problems in the internal system:
小系統法
Small system method
我們一套系統中，通常是由前級設備、周邊設備、后級組合而成。我們先把周邊設備統統去掉。例如：調音臺接功放，功放接音箱，看還有沒有噪聲，如果還有，我們把調音臺也舍去了，如果還有，那就是功放本底噪聲，屬于質量問題，只能換了。
Our system is usually composed of front-end equipment, peripheral equipment and rear-end equipment. Let's get rid of all the peripheral equipment first. For example, the mixer is connected to the power amplifier, and the power amplifier is connected to the speaker. See if there is any noise. If there is any noise, we will discard the mixer. If there is any noise, it is the background noise of the power amplifier, which belongs to the quality problem and can only be replaced.
如果沒有，那就是調音臺的設置不正確或質量問題，看增益是不是調得過大。如果小系統沒有問題，那肯定是舍去的那一堆周邊出問題了，這時候，我們要把周邊的設備一件一件的往上添加，再詳細檢查是設備設置問題還是質量問題。譬如降噪器有沒有調整好、均衡器增益有沒有過大等等。
If not, it is the setting of the mixer is incorrect or the quality problem. See whether the gain is adjusted too much. If there is no problem with the small system, there must be something wrong with the discarded pile of peripherals. At this time, we need to add peripherals one by one, and then check in detail whether it is the device setting problem or the quality problem. For example, whether the noise reducer is adjusted well, whether the equalizer gain is too large, and so on.
解決嘯叫問題；
Solve the howling problem;
這個問題的產生是由于揚聲器的聲音傳到麥克風形成了回路，經過多次放大后出現嘯叫。好的辦法是將兩者之間的通路進行物理上的隔斷，比如我們選用麥克風的時候盡量選用指向性的而不選用無指向性的（全向mice）,使用的過程中，麥克風盡量不要正對著揚聲器。
This problem is caused by the sound of the speaker reaching the microphone to form a loop, which is amplified for many times and then screams. A good way is to physically block the path between the two. For example, when we choose microphones, we try to choose directional microphones instead of non directional ones (omnidirectional MICs). In the process of use, we try not to face the speakers directly.
但是，由于有多支話筒，揚聲器的擺放也固定下來了，無法變更，那我們只能借助周邊設備去完成這個功能了，例如反饋抑制器，借助smartlive尋找嘯叫點，在均衡器上把對應的頻率點作衰減。
However, since there are multiple microphones and the placement of speakers is fixed and cannot be changed, we can only use peripheral devices to complete this function. For example, feedback suppressors can use smartlive to find howling points and attenuate the corresponding frequency points on the equalizer.
總之，我們把檢查出來認為有毛病的設備換一臺其他會議室調試好沒問題的設備，同樣的設置，如果問題解決了，那就是設備的問題了。如果問題還是存在，那就是系統中還存在其他問題你還沒有發現，我們需要重新細心地檢查。更多事項就來我們網站
http://www.zkvd.cn關注咨詢吧。
In short, we will replace the equipment that is found to be defective with the equipment that is fine in other conference rooms. With the same setting, if the problem is solved, it is the problem of the equipment. If the problem still exists, there are other problems in the system that you haven't found. We need to check carefully again. Come to our website for more information http://www.zkvd.cn Follow the advice.
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