不少单位的公共广播总机房在大楼里，大楼每一层是直接接的功放。对于较远的厂房，通过前置放大器放大，传送到厂房里的功放。那么
山东公共广播音响有电流声什么原因呢？
The public address main machine room of many units is in the building, and each floor of the building is directly connected to the power amplifier. For the far plant, it is amplified by the preamplifier and transmitted to the power amplifier in the plant. So what is the reason for the current sound in Shandong public broadcasting?
1、屏蔽线问题，检查屏蔽线质量是否正常；
1. If there is a problem with the shielded wire, check whether the quality of the shielded wire is normal;
2、检查机箱接地是否可靠；
2. Check whether the chassis is grounded reliably;
3、检查各部件之间接线是否有松脱迹象；
3. Check whether the wiring between components is loose;
4、检查电源供电是否正常。
4. Check whether the power supply is normal.
公共广播系统属于扩声音响系统中的一个分支，而扩声音响系统又称音响系统涉及电声、建声和乐声叁种学科的边缘科学。
The public address system belongs to a branch of the sound reinforcement system, and the sound reinforcement system, also known as the professional sound system, involves the edge science of three disciplines, namely, electro sound, building sound and musical sound.
所以公共广播系统终效果涉及合理、正确的电声系统设计和调试，良好的声音传播环境（建声条件）和精确的现场调音叁者佳的结合，叁者相辅相成缺一不可。
Therefore, the final effect of the public address system involves the combination of reasonable and correct design and commissioning of the electro acoustic system, good sound transmission environment (sound building conditions) and accurate on-site tuning. The three are complementary and indispensable.
广义的广播系统包含扩声系统和放声系统两大类：
In a broad sense, the broadcasting system includes two categories: sound reinforcement system and sound reproduction system:
1、扩声系统：扬声器与话筒处于同一声场内，存在声反馈和房间共振引起的啸叫，失真和振荡现象。要保证系统稳定和正常运行，高可用的系统增益比发生声反馈自激的临界增益低6诲叠。
1. Sound reinforcement system: the loudspeaker and microphone are in the same sound field, and there are howling, distortion and oscillation caused by acoustic feedback and room resonance. To ensure the stability and normal operation of the system, the highly available system gain is 6dB lower than the critical gain of acoustic feedback self excitation.
2、放声系统：系统中只有磁带机，光盘机等声源，没有话筒，不存在声反馈可能，声反馈系数为0，是广播系统一个特例。
2. Sound reproducing system: there are only sound sources such as tape player and optical disc player in the system, and there is no microphone. There is no possibility of acoustic feedback. The acoustic feedback coefficient is 0, which is a special case of the broadcasting system.
公共广播音响有电流声什么原因？以上的内容便是解答了，您对此有什么疑问的话就来我们网站
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What is the reason for the current sound in the public broadcasting system? The above content is the answer. If you have any questions about this, please come to our website Consult and understand.
