现实使用中，我们会发现有的广播系统是电声悦耳、自然流畅，但是有一些则带有些噪音、啸叫。面对这种情况，我们该如何处理呢？
山东公共广播音响厂家为您解答。
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:
引起电流声或者噪声问题，外部原因无非，只有叁个，外部音源设备、现场坏境噪声过大和系统供电有问题。我们一个个去排除，先把外部音源取下来，再把现场打开的麦克风全部关掉，隔断现场环境噪音的拾取，然后再去确认这一路电源有没有跟其他大型的用电系统共用一路电源。因为如果与其他大型的用电系统共用一路电源，它的使用会大大影响电流的变化，因此产生电流声。
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.
逐步排除内部系统各种问题：
Gradually eliminate various problems in the internal system:
小系统法
Small system method
我们一套系统中，通常是由前级设备、周边设备、后级组合而成。我们先把周边设备统统去掉。例如：调音台接功放，功放接音箱，看还有没有噪声，如果还有，我们把调音台也舍去了，如果还有，那就是功放本底噪声，属于质量问题，只能换了。
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.
如果没有，那就是调音台的设置不正确或质量问题，看增益是不是调得过大。如果小系统没有问题，那肯定是舍去的那一堆周边出问题了，这时候，我们要把周边的设备一件一件的往上添加，再详细检查是设备设置问题还是质量问题。譬如降噪器有没有调整好、均衡器增益有没有过大等等。
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.
解决啸叫问题；
Solve the howling problem;
这个问题的产生是由于扬声器的声音传到麦克风形成了回路，经过多次放大后出现啸叫。好的办法是将两者之间的通路进行物理上的隔断，比如我们选用麦克风的时候尽量选用指向性的而不选用无指向性的（全向尘颈肠别）,使用的过程中，麦克风尽量不要正对着扬声器。
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，由于有多支话筒，扬声器的摆放也固定下来了，无法变更，那我们只能借助周边设备去完成这个功能了，例如反馈抑制器，借助蝉尘补谤迟濒颈惫别寻找啸叫点，在均衡器上把对应的频率点作衰减。
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.
总之，我们把检查出来认为有毛病的设备换一台其他会议室调试好没问题的设备，同样的设置，如果问题解决了，那就是设备的问题了。如果问题还是存在，那就是系统中还存在其他问题你还没有发现，我们需要重新细心地检查。更多事项就来我们网站
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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 Follow the advice.
