合理接地音響設備的外殼一般與設備的電源變壓器屏蔽連在一起，這臺設備外殼也有一個“地”，這個“地”與其他兩個“地”也有所不同。當大地的“地”比較干擾時，設備外殼的“地”與之相接可以降低交流聲干擾，反之則不要相連。
1, the enclosure of reasonable grounding devices is usually connected with the shielding of the power transformers of the equipment. The shell of the device also has a "land", which is different from the other two "lands". When the earth's "ground" is disturbed, the "ground" of the equipment shell can reduce the interference of the AC sound, and vice versa.
2、弱信號設備電源與強信號設備電源分組連接弱信號音源設備如CD、卡座、效果器、調音臺、壓縮限幅器和均衡器等同一組電源連接，強信號功率放大器與另一組電源連接，可以避免傳導方式的電源交流噪聲干擾。
The power block device 2, weak signal and strong signal power equipment connected to weak signal source equipment such as CD, cassette, effects, mixer, compression limiter and a set of equivalent equalizer power connection, strong signal power amplifier is connected with a power supply and power supply can avoid the AC noise conduction mode.
3、把兩個“地”電位不同的音響設備間的信號地線分離，避免設備直接連通或形成地線環路。如平衡式連接外屏蔽線只在一端接地，或兩端都不接地等。
3, separate the signal ground lines between the two "ground" potential devices, and avoid the direct connection of the equipment or the formation of the ground line. For example, the outer shielding line of the balanced connection is only grounded at one end, or both ends are ungrounded, etc.
4、連接干凈的電源供電供電電源設計時，應設計單獨電源保定平面設計培訓 保定室內設計培訓 保定空調移機 保定太陽能維修 保定廚房排煙 雄安管道通風變壓器；無條件時可使用獨立一組電源供電，與空調、燈光等設備分開供電；或采用隔離電源變壓器等，這些都是行之有效的措施。
The design of power supply power supply connecting 4, clean, should design a separate power transformer; no conditions can be used when a group of independent power supply, power supply and air conditioning, lighting and other equipment separately; or the isolated power supply transformer and so on, these are effective measures.
5、使用懸浮接地就是該點電位與地相同，為零電位。但是該點又不是直接和地相連。是音響設備電路對地電位為零的點。這個“地”與實際的地之間存在阻抗，而且是高阻抗，這樣可以克服共模干擾。
5, the use of suspended grounding means that the potential of this point is the same as the ground, which is zero potential. But this point is not directly connected to the ground. It is the point in the sound equipment circuit that the ground potential is zero. There is an impedance between the "ground" and the actual land, and it is a high impedance, so that the common mode interference can be overcome.