公共广播音响一般就是指在大型建筑中，如、机场、火车站、展览中心、综合办公区等用于播放背景音响、广播通知等，不管是使用范围还是使用时间都是很广很大的，那么就很有可能出现噪音问题，下面来分析一番。
Public broadcasting sound generally refers to the background sound and broadcasting notice used in large-scale buildings, such as shopping malls, airports, railway stations, exhibition centers, comprehensive office areas, etc. whether it is used in a wide range or time, it is likely to have noise problems. Let's analyze it below.
话筒输入信号源
Microphone input signal source
检查方法：
Inspection method:
将话筒信号输入线依次拔掉，如有线话筒或者无线话筒等；然后检查音箱是否还有噪音，判断噪音是哪一路话筒引入系统的；
Unplug the microphone signal input line in turn, such as wired microphone or wireless microphone; Then check whether the speaker still has noise, and judge which microphone is the source of the noise;
解决方案：
Solution:
无线话筒引入，有可能是无线话筒的使用频段有干扰造成噪音，如果无线话筒能够调整频率的话，调整频率测试；
The introduction of wireless microphone may be caused by the interference of the frequency band of wireless microphone. If the wireless microphone can adjust the frequency, adjust the frequency test;
也可能是接收机接地不好造成的噪音，如果接收机固定到机柜了也有可能造成噪音，将接收机从机柜拆下，与机柜隔离测试检查噪音是否消失。如果消失的话，将接收机垫纸或者泡沫，放到其他设备或者托盘上。
It may also be the noise caused by the poor grounding of the receiver. If the receiver is fixed to the cabinet, it may also cause noise. Remove the receiver from the cabinet and test it to check whether the noise disappears. If it disappears, pad the receiver with paper or foam and put it on other equipment or tray.
有线话筒引入，一般是有线话筒线过长（四五十米及以上）引起的，更换短话筒线测试，长有线话筒线引入的噪音一般不好处理，长话筒线铺设的时候一般要求使用质量好的搁痴痴笔（两芯带屏蔽）线缆，在话筒线与前置放大器之间增加音频隔离器有可能会有帮助。
The introduction of wired microphone is generally caused by the long wired microphone line (40-50 meters and above). Replace the short microphone line for test. The noise introduced by the long wired microphone line is generally difficult to deal with. When laying the long microphone line, it is generally required to use high-quality RVVP (two core shielded) cable. It may be helpful to add an audio isolator between the microphone line and the preamplifier.
功放或者前置放大器
Power amplifier or preamplifier
检查方法：
Inspection method:
在不接入音源的情况下，也就是说前置放大器没有任何输入信号源，前置放大器与功放之间只有一根信号线，如果
山东公共广播音响还有噪音，将线拔掉，检查音箱是否还有噪音。
When the sound source is not connected, that is to say, the preamplifier has no input signal source, and there is only one signal line between the preamplifier and the power amplifier. If there is still noise in Shandong public radio, unplug the line and check whether there is still noise in the speaker.
解决方案：
Solution:
如果噪音消失，那问题出在前置放大器上，如果有其他的前置放大器代替测试一下，发回前置放大器维修或者更换备用机。如果还有噪音，那问题出在功放上，如果有其他功放代替测试，有问题功放发回公司维修或者更换备用机。
If the noise disappears, the problem lies in the preamplifier. If there is another preamplifier to replace the test, send it back to the preamplifier for maintenance or replace the standby machine. If there is still noise, the problem lies in the power amplifier. If there are other power amplifiers to replace the test, the power amplifier with problems will be sent back to the company for maintenance or replacement of the standby machine.
公共广播音响常见问题之-音箱有噪音的问题就讲解到这里了，如果您有需求购买或者有安装维修问题的，都可以关注我们网站
来联系我们咨询。
The common problems of public address sound - the problem of noise in speakers is explained here. If you need to buy or have installation and maintenance problems, you can follow our website Come and contact us for advice.
