机械噪音

Mechanical noise

机械噪音是有源音箱特有的。电源变压器在工作过程中，交变磁场引起的铁芯震动就会产生机械噪音，这很类似于日光灯镇流器所发出的嗡嗡声。选择质量好的产品仍然是预防这种噪音的最好办法。另外，我们可以在济南音响变压器和固定板之间加装橡胶减震层。

Mechanical noise is unique to the active speaker. Power transformers in the course of the work, the magnetic field caused by the vibration of the core will produce mechanical noise, which is similar to the sound of the light emitted by the ballast. The best way to prevent the noise is to choose good quality products. In addition, we can install rubber damping layer between the Ji'nan audio transformer and the fixed plate.
热噪
Thermal noise
如果电位器使用的时间较长，金属刷与膜片之间就会因灰尘堆积和磨损等问题产生接触不良，旋转时就会产生噪声。如果音箱的螺丝没有旋紧，倒相管处理不到位，在播放大动态音乐时，也会产生机械噪音。
If the potentiometer is used for a long time, the metal brush and the film between the film will be due to dust accumulation and wear and other problems caused by bad contact, when the rotation will produce noise. If there is no speaker of the screws tightened, pour in the processing does not reach the designated position, in large dynamic music playback, also can produce mechanical noise.
处理这种热噪声可以通过更换低噪声元件或是降低元件工作负荷的方法，另外，降低工作温度也是也是行之有效的方法之一。
The thermal noise can be reduced by replacing the low noise element or reducing the working load of the component.
另外，有些电脑音箱，当音量调得过大，也会出现噪音。这种情况是因为功放输出功率可能较小，不能避开音乐瞬间的大动态峰值信号造成的或者是因为由很多种情况会造成音箱有杂音，比如济南音响受到干扰、接口或者连接线接触不良、音箱本身质量较差等等。
In addition, some computer speakers, when the volume is too large, there will be noise. This situation is because the power amplifier output power may be smaller, can not avoid the music instantaneous peak signal caused by the large dynamic or because of many kinds of situations will cause the speaker has a noise, such as the Ji'nan sound interference, interface or link line contact, speaker itself is poor quality, etc..
其它问题导致：
Other problems:
1、插卡不正
1, the card is not
声卡没有同主板扩展槽严密分离，经过目视可见声卡上“金手指”与扩展槽簧片有错位现象。这种现象在ISA卡或PCI卡上都有，属于常见毛病，想方法让声卡插正就能够处理问题了。
Without sound card with the motherboard expansion slots strict separation, after visual sound "Goldfinger" and expansion slot reed dislocation phenomenon. This phenomenon in the ISA card or PCI card, are common problems, think of ways to let the sound card plug is able to deal with the problem.
2、有源音箱输入端接在了声卡的Speaker输出端
2, active speaker input is connected to the sound card of the Speaker output terminal
有源音箱应接在声卡的Line-Out端，它输出的信号没有经过声卡上的放大，噪声要小得多。有的声卡只要一个输出端，是Line-Out还是Speaker要靠卡上的跳线决议，默许方式常常是Speaker，所以假如需求的话，还得拔下声卡调整跳线。
Active speaker sound card should be received in the Line-Out end, the output signal without amplification on the card, the noise is much smaller. Some of the sound card as long as an output end is Line-Out or speaker rely on card jumper resolution, acquiescence is often the speaker, so if demand and pull off the sound adjustment jumper.
3、声卡驱动程序问题
3, sound card driver problem
你可能用的是系统自带的驱动程序，或驱动有问题，假如是这样，可以换一个声卡驱动程序。
You may use the system comes with the driver, or the driver has a problem, if so, you can change a sound card driver.
音箱线简介
Speaker line profile
音箱线（俗称喇叭线）是济南音响 http://www.jnzqyx.com/ 器材中专门用于功放与音箱问连接的线材，由于音箱线传送的是功率信号，因此在它上面不应有太大的信号损失，这就在客观上要求音箱线具有极为优秀的导电性能，优秀的导电性能要求线材要具备极传送能力。目前用来衡量这两点的主要技术指标是N值与导线股数。N值是反映音箱线在制作中所使用金属纯度高低的参数。
Speaker line (commonly known as the horn line) is specialized in Ji'nan audio equipment for power amplifier and speakers to connect the wire, because the speaker wire transmission is the power signal, so it should not be too large signal loss, which is objectively required to have a very good performance of the sound box, excellent electrical conductivity of wire to have a very high transmission capacity. The main technical indicators currently used to measure these two points is the N value and the wire strands. N value is a parameter that reflects the purity of the metal used in the production of the sound box.
音箱制作
Sound box production
１、高音单元：利用各种反射办法，展宽高音的辐射角，因为高音扬声器发声方向性强，为使两边听众度能听见高音，必须改善高音头的辐射角。高音音箱的形状多样，各厂家生产的各不相同，而目的却是一致的，既改善高音的辐射特性。
1, the high frequency unit: the use of a variety of reflective approach to broaden the radiation angle, because the high pitched speaker sound direction, so that both sides of the audience can hear the high pitched sound, it is necessary to improve the radiation angle. The shape of the high sound box is varied, each manufacturer's production is different, but the purpose is the same, it not only improves the high sound radiation characteristic.
２、中音音箱：将中音扬声器口朝外装入箱体，箱体内部装入不规则隔板，以防产生声音共振，箱体外表要美观。
2, the mediant speakers: mediant loudspeaker mouth outwards into the box, inside the box into irregular baffle to prevent produce sound resonance, surface of the box should be beautiful.
３、低音单元：有着严格的原理上的考虑，在结构上必须消除低频声波的绕射现象。目前常用的有两种，一种是封闭式低音音箱，另一种是倒相式低音音箱。
3, the bass unit: there are strict principles of consideration, eliminate the diffraction phenomenon of low-frequency acoustic waves in the structure must be. At present, there are two kinds of commonly used, one is a closed bass sound box, and the other is the inverted bass sound box.