Why does the computer speaker have current sound?

Netizen consults the author said: His computer speaker recently suddenly appeared the noise, is the current sound, does not open any music has, the volume is bigger, the murmur is also big, before has been good, suddenly has been so, is the speaker bad, why does the speaker have the current sound? What if the speaker has current sound?

Many kinds of situation can cause the sound box to have the noise, for instance the speaker is disturbed, the interface or the connection line contact is bad, the sound box itself quality is inferior and so on. Generally speaking, the speaker is a lot of active speakers, its internal will certainly exist amplifier, so the noise is unavoidable, the source of noise from the source can be roughly divided into electromagnetic interference, mechanical noise and thermal noise.

Speaker problems lead to:

First, electromagnetic interference

Electromagnetic interference can be divided into power transformer interference and spurious electromagnetic interference.

1, Power transformer interference

As a result of the power leakage of multimedia speakers, the conditions allowed for the transformer to install shielding shield effect is very obvious, can be the greatest degree of leakage magnetic barrier, shielding cover can only be made of iron-type materials. We should try to choose the big brand, the materials used solid products, in addition, the use of external transformers is also a good solution.

2, stray electromagnetic interference

More common, speaker wire, divider, wireless equipment or computer host will become a source of interference. Keep the main speakers as far away from the computer host as possible and reduce the peripheral wireless devices.

Second, mechanical noise

Mechanical noise is unique to active speakers. Power transformers in the course of work, the alternating magnetic field caused by the iron core vibration will produce mechanical noise, which is similar to the solar lamp ballasts issued by the Hum. Choosing a good quality product is still the best way to prevent this kind of noise. In addition, we can install rubber damping layer between the transformer and the fixing plate.

Third, thermal noise

If the potentiometer is used for a long time, between the metal brush and the diaphragm will be due to dust accumulation and wear problems such as poor contact, rotation will produce noise. If the speaker screws do not tighten, inverted phase tube processing is not in place, in the play of large dynamic music, will also produce mechanical noise.

It is also one of the effective methods to deal with this kind of thermal noise by replacing the low noise components or reducing the working load of the components, and reducing the working temperature.

In addition, some computer speakers, when the volume is too large, there will be noise. This situation is because the power amplifier output may be small, can not avoid the music moment of the big dynamic peak signal caused by or because of a lot of circumstances will cause a sound box noise, such as speakers are disturbed, interface or connection line bad contact, the speaker itself poor quality and so on.

Other problems lead to:

1, insert card is not right

The sound card is not closely separated from the motherboard expansion slot, through visual visible sound card on the "golden Finger" and expansion groove 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, the active speaker input terminal in the sound card speaker output end

The active speaker bell in the sound card line-out end, it output signal does not pass through the sound card amplification, the noise is much smaller. Some sound card as long as an output, is line-out or speaker to rely on the card on the jumper resolution, acquiescence is often speaker, so if required, but also unplug the sound card adjustment jumper.

3, the sound card driver program problem

You may be using the system's own driver, or driver has problems, if so, you can change a sound card driver.

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