1.合理接地的音響設備外殼一般與設備電源變壓器的屏蔽連接。該設備的外殼也有一個“接地”，這也不同于其他兩個“接地”。當地面的“地”受到相對干擾時，可將設備外殼的“地”與之連接，以減少交流聲干擾，否則不得連接;
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.弱信號設備電源與強信號設備電源成組連接。CD、卡座、效應器、混音器、壓縮限制器、均衡器等弱信號聲源設備與一組電源相連，強信號功率放大器與另一組電源相連，可避免傳導模式下電源交流噪聲的干擾;
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.將兩個具有不同“接地”電位的音頻設備之間的信號接地線分開，以避免設備直接連接或形成接地線回路。如平衡連接的外屏蔽線僅一端接地，或兩端不接地等;
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.連接清潔電源時，應設計單獨的電源變壓器;無條件時，可采用獨立的電源組與空調、照明等設備分開供電;或使用隔離電源變壓器，這些都是有用的措施;
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.使用懸浮接地意味著該點處的電位與地面處的電位相同，且為零電位。但該點并沒有直接接地。這是音頻設備電路對地電位為零的點。該“地”與實際地之間存在阻抗，且阻抗高，可克服共模干擾;
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;
6.兩個音頻設備之間不應有直流電路連接;
6. There shall be no DC circuit connection between two audio devices;
會議室音響設備
Meeting room audio equipment
7.不同系統之間的連接應采用平衡隔離變壓器，以連接音響系統的音響系統和電視廣播車的音響系統;系統與大型電子顯示屏的連接;或與電子計算機等連接，一般需要與平衡隔離變壓器連接。不同系統的公共接地比較容易引起交流噪聲的干擾;
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.遠距離信號傳輸采用平衡或平衡隔離變壓器的傳輸方式，短距離信號傳輸可采用非平衡式。采用平衡隔離變壓器的傳輸方式。一般情況下，兩端應有平衡變壓器，屏蔽層的一端可接地或懸掛。接地可起到屏蔽作用，防止因設備漏電而發生觸電事故。不接地時，兩端平衡變壓器起到絕緣隔離作用，平衡變壓器中心接地放電靜電;
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.當電源干擾非常嚴重時，設備分相連接，連接小信號音頻設備和監控設備的電源。在三相電源中選擇交流噪聲干擾小的相位，其余兩相連接大信號功率放大器，可降低電源的交流噪聲干擾;
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;
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