What should I do if there is a humming sound when the computer stereo is turned on and accented?

First, first confirm that the hardware is fine. If the speaker is fine, the sound card is fine, and if you've tested it on other machines and it's really good, then you can read on. 2. Make sure all the cables are exactly right.

Then power on the speaker and turn on the volume switch. 3. Install the driver of the sound card correctly, if it is an onboard sound card, it is best to install the driver provided on the driver disk of the motherboard. (Actually, the computer doesn't make a sound, and many times it's because the sound card is not driven correctly.)

In general, after the sound card driver is installed, there will be a small speaker icon in the taskbar in the lower right corner. Fourth, if you are sure that the driver is installed correctly, then take a look at the volume settings in the computer. Here's how:

Double-click the speaker icon in the taskbar to see if the volume is turned off to the minimum or muted in the Volume Control and Waveform dialog box that pops up. If these two options are not available in the dialog box, click on the "Options" menu - select "Properties" - select "Volume Control" and "Waveform" in the "Show Volume Controls" and then set them correctly. Note:

Step 4 can only be set up after the driver for the sound card has been installed correctly. Special reminder: In fact, many times, the reason why the computer does not work properly is a small fault, soft failure, careful analysis, many times can easily solve the problem.

Upstairs is very detailed, don't talk about it..!

Causes and elimination of "humming" in computer desktop audio:

1. First turn off the volume potentiometer to the minimum.

2. At this time, if there is a "buzzing sound", it is the power supply system, the bridge rectifier filter capacitor is faulty, check whether the filter capacitor is small, there is leakage, flow electrolyte, bulging and other phenomena, it is recommended to replace the same type of capacitor.

3. If the grounding end of the audio cable is not in good contact or disconnected, the audio cable must be an isolated wire (braided wire).

4. In the audio input line, in good condition, the volume is turned off to the minimum without humming, and it increases with the increase of volume, which means that the pre-voltage amplification circuit of the power amplifier is faulty and needs to be repaired by the maintenance master.

There are many situations that will cause noise in the computer audio, such as the speaker is interfered with, the interface or connection line is not in good contact, and the sound itself is of poor quality.

Generally speaking, computer audio is mostly active speakers, and there will be amplifiers inside, so noise is inevitable, and the noise of active speakers can be roughly divided into electromagnetic interference, mechanical noise and thermal noise.

Electromagnetic interference can be mainly divided into power transformer interference and stray electromagnetic wave interference. Generally speaking, the power transformer interference is caused by the power flux leakage of the multi-speaker speaker, and the effect of installing a shielding cover for the transformer is very obvious when conditions permit, which can block the magnetic leakage to the greatest extent, and the shielding cover can only be made of iron materials. We should try to choose products with big brands and solid materials, and in addition, using external transformers is also a good solution.

Stray electromagnetic interference is common, and speaker wires, crossovers, wireless devices, or computer hosts can all become sources of interference. Keep the main speaker as far away from the computer as possible and reduce the number of peripheral wireless devices.

Mechanical noise is specific to active loudspeakers. During the operation of the power transformer, the core vibration caused by the alternating magnetic field will produce a mechanical noise, which is very similar to the humming sound emitted by the ballast of a fluorescent lamp. Choosing the best product is still the best way to prevent this noise.

In addition, we can add a rubber shock absorber between the transformer and the fixing plate.

It should also be noted that if the potentiometer is used for a long time, the contact between the metal brush and the diaphragm will be poor due to dust accumulation and abrasion, and noise will be generated when it rotates. If the screws of the speaker are not tightened, and the inverter is not handled properly, mechanical noise will also be generated when the **big dynamic**.

This thermal noise can be dealt with by replacing low-noise components or reducing the working load of the components, and reducing the operating temperature is also one of the most effective methods.

In addition, some computer speakers, when the volume is turned up too much, there will also be noise. This situation is caused by the fact that the output power of the power amplifier may be small, and it cannot avoid the large dynamic peak signal at the moment, or because of the overload distortion of the horn.

There are many reasons for humming noise in computer speakers, and common factors include power supply, connection scheme, cables, electromagnetic interference, etc. Here are some common solutions for a coincidence:

1.Change the power supply: Try connecting a different power outlet, or replacing the power cord to eliminate possible power issues.

2.Clean the cable connectors: Clean the connector of the speaker cable to prevent interference caused by poor contact.

3.Keep it away from electromagnetic interference: Keeping the computer speaker away from the power supply, computer host and other equipment with electromagnetic interference can improve the noise problem.

4.Replace the audio cable: Use a high-quality audio cable, including better shielding, to reduce speaker interference and noise.

5.Install an isolation transformer: Adding an isolation transformer between your computer speaker and the power supply can help eliminate issues such as moiré currents.

6.Use a ground cable: Connect the ground cable of the speaker, which can effectively reduce static interference.

7.Turn off potentially interfering devices: For example, cell phones, televisions, and other electronic devices, and turning off devices that may interfere with speakers can reduce interfering noise.

If the above methods cannot solve the problem of humming of computer speakers, it is recommended to contact the manufacturer for a more in-depth inspection or replacement.