1.合理接地的音响设备外壳一般与设备电源变压器的屏蔽连接。该设备的外壳也有一个&濒诲辩耻辞;接地&谤诲辩耻辞;，这也不同于其他两个&濒诲辩耻辞;接地&谤诲辩耻辞;。当地面的&濒诲辩耻辞;地&谤诲辩耻辞;受到相对干扰时，可将设备外壳的&濒诲辩耻辞;地&谤诲辩耻辞;与之连接，以减少交流声干扰，否则不得连接;
1. The properly grounded sound equipment shell is generally connected with the shielding of the equipment power transformer. The enclosure of the device also has a "ground", which is different from the other two "grounds". When the "ground" of the ground is relatively disturbed, the "ground" of the equipment shell can be connected with it to reduce AC sound interference, otherwise it shall not be connected;
2.弱信号设备电源与强信号设备电源成组连接。颁顿、卡座、效应器、混音器、压缩限制器、均衡器等弱信号声源设备与一组电源相连，强信号功率放大器与另一组电源相连，可避免传导模式下电源交流噪声的干扰;
2. The power supply of weak signal equipment is connected with that of strong signal equipment in groups. CD, card holder, effector, mixer, compression limiter, equalizer and other weak signal sound source equipment are connected with one group of power supply, and the strong signal power amplifier is connected with another group of power supply, which can avoid the interference of power supply AC noise in conduction mode;
3.将两个具有不同&濒诲辩耻辞;接地&谤诲辩耻辞;电位的音频设备之间的信号接地线分开，以避免设备直接连接或形成接地线回路。如平衡连接的外屏蔽线仅一端接地，或两端不接地等;
3. Separate the signal grounding wire between two audio devices with different "grounding" potentials to avoid direct connection or formation of grounding wire loop. For example, only one end of the balanced external shield wire is grounded, or both ends are not grounded, etc;
4.连接清洁电源时，应设计单独的电源变压器;无条件时，可采用独立的电源组与空调、照明等设备分开供电;或使用隔离电源变压器，这些都是有用的措施;
4. When connecting the clean power supply, a separate power transformer shall be designed; If there are no conditions, independent power supply group can be used to supply power separately from air conditioning, lighting and other equipment; Or use isolated power transformers, which are useful measures;
5.使用悬浮接地意味着该点处的电位与地面处的电位相同，且为零电位。但该点并没有直接接地。这是音频设备电路对地电位为零的点。该&濒诲辩耻辞;地&谤诲辩耻辞;与实际地之间存在阻抗，且阻抗高，可克服共模干扰;
5. The use of suspended grounding means that the potential at this point is the same as that at the ground and is zero potential. But this point is not directly grounded. This is the point where the potential to ground of the audio equipment circuit is zero. There is an impedance between the "ground" and the actual ground, and the impedance is high, which can overcome the common mode interference;
6.两个音频设备之间不应有直流电路连接;
6. There shall be no DC circuit connection between two audio devices;
会议室音响设备
Meeting room audio equipment
7.不同系统之间的连接应采用平衡隔离变压器，以连接音响系统的音响系统和电视广播车的音响系统;系统与大型电子显示屏的连接;或与电子计算机等连接，一般需要与平衡隔离变压器连接。不同系统的公共接地比较容易引起交流噪声的干扰;
7. Balanced isolation transformer shall be adopted for the connection between different systems to connect the sound system of sound system and the sound system of TV broadcasting vehicle; Connection between the system and large electronic display screen; Or connected with electronic computer, generally connected with balance isolation transformer. The common grounding of different systems is easy to cause the interference of AC noise;
8.远距离信号传输采用平衡或平衡隔离变压器的传输方式，短距离信号传输可采用非平衡式。采用平衡隔离变压器的传输方式。一般情况下，两端应有平衡变压器，屏蔽层的一端可接地或悬挂。接地可起到屏蔽作用，防止因设备漏电而发生触电事故。不接地时，两端平衡变压器起到绝缘隔离作用，平衡变压器中心接地放电静电;
8. Long distance signal transmission adopts the transmission mode of balanced or balanced isolation transformer, and short-distance signal transmission can adopt unbalanced type. The transmission mode of balanced isolation transformer is adopted. Generally, balance transformers shall be provided at both ends, and one end of the shielding layer can be grounded or suspended. Grounding can play a shielding role to prevent electric shock accidents due to equipment leakage. When not grounded, the balance transformers at both ends play the role of insulation and isolation, and the center of the balance transformer is grounded to discharge static electricity;
9.当电源干扰非常严重时，设备分相连接，连接小信号音频设备和监控设备的电源。在叁相电源中选择交流噪声干扰小的相位，其余两相连接大信号功率放大器，可降低电源的交流噪声干扰;
9. When the power interference is very serious, the equipment shall be connected in separate phases to connect the power supply of small signal audio equipment and monitoring equipment. In the three-phase power supply, the AC noise interference is selected to a small phase, and the other two phases are connected with a large signal power amplifier to reduce the AC noise interference of the power supply;
