更新時(shí)間：2023-05-29
文章來(lái)源：http://gulfbaader.com/
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會(huì)議室音響設(shè)備安裝連接時(shí)，如何避免電流聲的處理方法如下：
When installing and connecting audio equipment in a conference room, the following methods are used to avoid electrical noise:
1、合理接地音響設(shè)備的外殼一般與設(shè)備的電源變壓器屏蔽連在一起，這臺(tái)設(shè)備外殼也有一個(gè)“地”，這個(gè)“地”與其他兩個(gè)“地”也有所不同。當(dāng)大地的“地”比較干擾時(shí)，設(shè)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 casing of a properly grounded audio equipment is generally connected to the power transformer shield of the equipment, and this equipment casing also has a "ground", which is different from the other two "grounds". When the "ground" of the ground is relatively disturbed, connecting the "ground" of the equipment casing to it can reduce the interference of AC sound, otherwise, do not connect it;
2、弱信號(hào)設(shè)備電源與強(qiáng)信號(hào)設(shè)備電源分組連接弱信號(hào)音源設(shè)備如CD、卡座、效果器、調(diào)音臺(tái)、壓縮限幅器和均衡器等同一組電源連接，強(qiáng)信號(hào)功率放大器與另一組電源連接，可以避免傳導(dǎo)方式的電源交流噪聲干擾；
2. The power supply of weak signal equipment and the power supply of strong signal equipment are connected in groups. The weak signal sound source equipment such as CD, card holder, effector, mixer, compression limiter and equalizer are connected with one set of power supply, and the strong signal power amplifier is connected with another set of power supply, which can avoid AC noise interference of power source in conduction mode;
3、把兩個(gè)“地”電位不同的音響設(shè)備間的信號(hào)地線分離，避免設(shè)備直接連通或形成地線環(huán)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 wires between two audio devices with different "ground" potentials to avoid direct connection or formation of ground loop. For example, the balanced connection of the external shielding wire is only grounded at one end, or both ends are not grounded, etc;
4、連接干凈的電源供電供電電源設(shè)計(jì)時(shí)，應(yīng)設(shè)計(jì)單獨(dú)電源變壓器；無(wú)條件時(shí)可使用獨(dú)立一組電源供電，與空調(diào)、燈光等設(shè)備分開(kāi)供電；或采用隔離電源變壓器等，這些都是行之有效的措施；
4. When designing a clean power supply, a separate power transformer should be designed; When there are no conditions, an independent set of power sources can be used for power supply, separated from air conditioning, lighting and other equipment; Or using isolated power transformers, etc., these are effective measures;
5、使用懸浮接地就是該點(diǎn)電位與地相同，為零電位。但是該點(diǎn)又不是直接和地相連。是音響設(shè)備電路對(duì)地電位為零的點(diǎn)。這個(gè)“地”與實(shí)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 floating grounding means that the potential at 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 where the ground potential of the audio equipment circuit is zero. There is impedance between this' ground 'and the actual ground, and it is high impedance, which can overcome common mode interference;
6、兩音響設(shè)備間不能有直流的電路連接；
6. There should be no direct current circuit connection between the two audio devices;
7、不同系統(tǒng)連接須采用平衡式隔離變壓器連接音響系統(tǒng)與電視轉(zhuǎn)播車(chē)音頻系統(tǒng)的連接；系統(tǒng)與大型電子顯示屏的連接；或與電子計(jì)算機(jī)的連接等，一般須用平衡式隔離變壓器連接。不同系統(tǒng)共地容易引起交流噪聲的干擾。
7. The balanced isolation transformer must be used for the connection of different systems to connect the audio system with the audio system of the television relay vehicle; Connection between the system and large electronic display screens; Or the connection with the electronic computer, etc., must generally be connected with a balanced isolation transformer. Different systems sharing the same ground are most likely to cause interference from AC noise.
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