北京市音响设备厂

The influence of vibration on the sound equipment

3对功放的影响

The influence of 3 on the power amplifier

电解电容器，受到机械振动时，会产生噪声。电源变压器，会产生机械振动。外部声波，会引起设备的机械振动。尽管这些振动和噪声不容易觉察，但对处理放大微弱声频信号的功放而言，都将对音质产生影响：分析力下降，透明度变差、噪声增大。

Electrolytic capacitors, when subjected to mechanical vibration, produce noise. The power transformer will produce mechanical vibration. The external sound wave causes the mechanical vibration of the equipment. Although these vibrations and noises are not easy to perceive, they will affect the quality of sound, including the decrease of analysis power, the deterioration of transparency and the increase of noise.

2对音源的影响

The influence of 2 on the sound source

在CD机或转盘内，都有机械驱动系统的旋转部分，这是产生机械振动的根源。设计上，把旋转系统设置于机器的中心部位，并用若干只避震脚支撑，这是一种理想的克服振动的方法。对转盘或数位类比转换线路(DAC）而言，在受到设备内部和外来机械振动影响时，由于机芯或整机受到的振动，将传递到唱片上，从而对声频信号产生调制作用，使声音变混，增大了失真及噪声。

In the CD or disk, a rotating part of the mechanical drive system, which is the root cause of mechanical vibration. In design, it is an ideal way to overcome the vibration by setting the rotating system at the center of the machine and using a number of shock - free feet. On the turntable or digital to analog conversion circuit (DAC), the affected equipment internal and external mechanical vibration, the vibration movement or by machine, will be transferred to the record, resulting in modulation of the audio signal, the sound becomes mixed, increases the distortion and noise.

就设备本身而言，主要通过增大整机重量，以及采用对称布局结构，保持重量平衡，取得高的稳定性。使用上﹐避免将音响器材重叠堆放（这是一种错误的放置方式，因为各器材间的振动将交互影响）。正确方法：各器材分开放置于坚固稳定的器材架上。

As far as the equipment itself is concerned, the weight balance is maintained and high stability is achieved by increasing the weight of the whole machine and using the symmetrical layout structure. In use, avoid stacking the sound equipment (this is a wrong way of placing, because the vibration of the equipment will interact with each other). The correct method: the equipment is placed on the sturdy and stable equipment separately.

4对喇叭的影响

The influence of 4 on the horn

喇叭箱体振动时，会造成共振，而箱壁辐射的声波，将直接干扰喇叭的直接辐射声波，导致音质的劣化。喇叭单体本身就是一个震动体。对喇叭箱体，应使其整体稳重厚实。任音箱高歌劲舞，任音乐在箱体内荡气回肠，而箱体应不为所动。

When the horn box vibrates, it will cause resonance, and the sound waves that radiate from the box wall will directly interfere with the direct radiation sound wave of the horn, causing the deterioration of the sound quality. The horn monomer itself is a vibrant. For the horn box, it should be stable and thick and thick. As speakers sing dance, music was very touching in the box body, the box should be unmoved.

音响器材的避震，通常可以归结为两类

The shock avoidance of sound equipment can be summed up in two categories

使用质地坚实的木柜或金属柜，放置器材作承架。

Use a solid wood cabinet or metal cabinet to place equipment as a carrier.

利用脚钉、吸震垫或其它东西，将器材与承架以及承架与地面作隔离。

Using foot nail, shock absorber or other things, the equipment and the support frame and the ground are isolated from the ground.

音响器材的声音特点是设计者所赋予的。所以，并不是每种器材都能适合使用各种避震器件，应视实际情况而决定采用何种避震方法。

The sound features of the sound equipment are given by the designers. So, not every kind of equipment can be suitable for the use of various seismic devices, which should be determined by the actual conditions.

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  脚钉、脚架

Foot nail, tripod

钉脚又称脚钉，是一个像钉子似的圆锥体，有各种类形和各种材质，可以单独放在器材或音箱下，也可以放在防震板、防震架下使用。它的尖头着地，能把有害的震动减至最小。脚钉、脚架等都是利用适当的介质和几何形状，将音响器材外壳与承载体的接触面减少到最小，造就一个声学高阻抗区，使产生隔离作用，或者说是将音响系统的振动“机械接地”。硬质角锥、脚钉可将器材本身的振动导出，把器材与外界的振动阻隔。一个有效的避震脚钉，必须在传导振动的同时，将振动的机械能转换成热能散发掉。不同材料制作的角锥、脚钉有其固定的谐振频率，各具优缺点。

The pin foot, also known as the foot pin, is a cone like a nail. It has various shapes and various materials. It can be placed alone under the equipment or speakers, or can be placed under the shockproof plate and the shockproof rack. It has a sharp point and can minimize the harmful vibration. Foot pins, scaffold and so on are all using the appropriate medium and geometry to minimize the contact surface between the shell and the bearing body, creating an acoustic high impedance area, resulting in the isolation effect, or the mechanical grounding of the sound system. Hard pyramid and foot nail can derive the vibration of the equipment itself, and block the equipment from the vibration of the outside. An effective shock pin must transfer the vibrational mechanical energy into thermal energy while conducting the vibration. The pyramid and foot nail made by different materials have their fixed resonant frequency, and each has its own advantages and disadvantages.