Hissing, noise, crackling and other extraneous sound in speakers and headphones - how to find and eliminate the cause? How to connect the center to the computer? When connected, a background appears in the speakers, as if the socket is gouged. Tried on many computer systems, maybe the reason

Answers:

Alexey:
The center is apparently connected to the computer by two or more common wires, the second - the center may have too much input resistance, try putting two 100 - 200 Ohm resistors at the end of the wire (near the center), it should help a lot. And the third thing that comes to mind is that one of the wires is broken, maybe a common one, or maybe the computer and the center are grounded to one point or to one metal structure. In general, it is not recommended to connect the center to a computer without galvanic isolation, since the potential difference may be enough to burn the sound system, or even the motherboard.

Tsyupka Roman:
The wire must be shielded.

Sergei M. Komarov:
In order to avoid background, you need to use a shielded cord (with a metal braid over each wire).

Ryzhanov Denis Ivanovich:
There is a special wire with three connectors. Two connectors are connected to the center (left and right channel), while the third one is simply connected to the mass of the center (for example, I have the third wire connected to the antenna jack, which the radio should catch).

TU-154:
The reason may be in interference from the computer's power supply or from the monitor. The background is most noticeable on integrated sound cards and almost disappears on normal sound cards. In addition, the connecting wire must be shielded and, preferably, the case of the system unit must be grounded.

Yuri Alexandrovich Peisakhovich:
1. The connecting wire must be shielded. 2. Connect the PC and center cases with a wire and, preferably, ground them.

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Instruction

First you need to determine the cause of the appearance of extraneous noise in the speakers. Most often this can be a bad shielding of the amplifier and / or cable. To check this, take the cable in your hand. If the noise gets louder after this, just wrap the cable with foil or replace it with a new shielded one. As for the latter, this is the most optimal option, since no magnetic fields will interfere with the sound from the speakers, and the sound itself will be cleaner.

Noise in speakers can occur due to lack of grounding. Cheap enclosures often leak electrical signals that interfere with the entire system. To resolve this issue, it is recommended that you ground your computer. The easiest option is to connect the case, for example, to a battery. Thus, the voltage from the case will be removed, and the noise will disappear.

Try setting up the speaker mixing system. To do this, go to the menu "Start -" Control Panel - "Sound. In the "Playback" tab, find your speakers, right-click and select the "Properties" line in the menu that appears. Then in the window that opens, find the “Levels” tab and disable the “Line Input” function in it.

If all of the above methods do not help fix the problem, there is only one thing left - to purchase new speakers.

Sources:

Why when you turn off the computer in the columns

All technology tends to fail sooner or later. It seems that the speakers are practically new, but gradually a strange noise becomes more and more distinct. At first it seems that this is just a temporary phenomenon, but every day the noise becomes more intense and soon it is impossible to make out the sounds coming from the speakers.

Instruction

There are many sources of noise. The most annoying thing is when the noise in the speakers or the TV comes from a ringing mobile phone. In this case, it is quite difficult to completely get rid of the noise in the speakers, but you can weaken it. To do this, it is necessary to neutralize the magnetic field of the heads using shielding. First of all, you should replace the plug with which the speakers are connected to a computer or music center. It is better if the plug is in a metal case. You need to inspect the signal wire that leads from the speakers to the computer. Each wire must be individually or double shielded.

It is also necessary to replace all the old wires inside the speakers with shielded ones. It is better to move the power filter inside the column. Then you should purchase shielding paint and a brush at the building supermarket, disassemble each column, carefully paint with paint and let dry for several hours. If it is not possible to purchase paint, ordinary aluminum foil will help solve the problem. She needs to glue all the existing columns from the inside. After these simple, but time-consuming procedures, the noise will not appear at all, or will be insignificant.

If, after connecting the speakers, one of which contains an amplifier, there are slight noises when the wires or the mouse move, grounding is required. If grounding is available, the problem may be in a poor-quality power supply. A change in the current consumed occurs during the movement of optical and magnetic heads, scrolling text and other actions. The drive motors need more current, the processor has to redraw screen fragments in response to the movement of the scroll motor, which causes current surges and changes in power consumption.

This interference can be suppressed only with the correct wiring of the power circuits, the installation of a high-quality power supply and blocking capacitors. The sound and system board are responsible for blocking and divorce, but the power supply plays the main role. The problem can be fixed by replacing the power supply.

Causes and elimination of extraneous sound in speakers and headphones

Speaker/headphone cable

1) Is the cable intact?

Many do not attach any importance to this (allegedly, what will happen to it), and the cable, by the way, can be damaged by accident: when the furniture is moved carelessly, by bending, stepping on the heel. In addition, many people have pets at home. In general, there are enough reasons even without your direct intervention ...

The photo below shows a damaged audio cable...

2) Broken audio jacks

Over time, any audio connectors begin to "weaken" (most often from intensive use) - and the plug in them is not clamped tightly, sometimes there is even a slight backlash (gap). If in this case you try to insert / remove the plug, twist it in the socket - you may notice how noise appears in the speakers and how they disappear. Thus, you can choose the position of the plug, in which there will be no noise. The cable in this "ideal" position can be fixed with tape.

In general, if the problem is with broken sockets, replace them in the computer. service, the question is not too "expensive".

3) Cable length

I also want to pay attention to the length of the cable. If computer speakers are located 2 meters from the system unit, then using cables 10 meters long is unreasonable (especially if there are any adapters, extension cords). All this can cause "distorted" sound, a kind of interference. In general, cables longer than 2-5 meters (in the most common situations, for household use) are not recommended.

4) Is the cable fixed

Another reason that I had to face was the following: the cable from the system unit to the speakers was on the "weight", about 2 meters long. Naturally, if the window in the room was open, then the draft made this cable "dangle" and extraneous noises were observed.

It was very easy to get rid of the problem: using ordinary adhesive tape, we attached the cable in 2-3 places to the table and the noise disappeared.

By the way, the cable can also be touched by passing people (if your PC is not very comfortable), pets, even your own legs (if the cable runs under the table). Therefore, my advice is: fix (fix) or lay the cable so that no one touches it accidentally.

The photo below shows special holders / clamps that exclude the "entanglement" of cables and exclude that some wires "will" hang out. These Velcro holders can be placed on the back of the table and secure all the wires and cables. Instead of them, by the way, you can use ordinary tape.

5) Front and rear audio jacks

Another important point: if laptops have only one audio connector (usually on the side panel), then the system unit has 2 of them (most often): on the back of the unit, and in front.

Many users find it more convenient to connect headphones (sometimes speakers) to the front of the unit - and often in this case the sound is not as good as if you connected it to the audio jacks on the back of the system unit. This is due to adapters, extension cords, etc. moments with connecting the front panel (from the back of the system unit - the audio outputs go "directly" from the sound card).

In general, the motive for this advice is simple: try connecting headphones / speakers to the audio outputs on the back of the system unit.

6) Is the cable intertwined with other cords

Also, phoning and extraneous noise in the speakers may occur due to the fact that the audio cable will be too "tightly" intertwined with other wires. Try to carefully position it so that it is away from the rest. By the way, this advice intersects with fixing the cable (see just above).

And one more tip: if you have hiss and noise in the speakers, try connecting headphones instead (or vice versa). This will not solve the problem, but will help find and diagnose the cause. If there is no noise in the headphones, then for sure the reason lies outside the system unit (which is already something ...).

Incorrect sound settings in Windows

Often, extraneous noise in the speakers is associated with not quite "correct" sound settings in Windows. Therefore, I recommend trying to change them ...

To do this, open the Windows Control Panel at: Control Panel\Hardware and Sound .

It will display several of your audio devices. Open the properties of the one through which the sound goes by default (such a device is marked with a green checkmark).

Note: by the way, if the default device for sound playback is not selected correctly, then you will not hear sound.

When will you open speaker properties(default playback devices) - look at the "Levels" tab (see screenshot below). In this tab, reduce all extraneous sources to a minimum: PC Beer, CD, Microphone, Line-in, etc. (their number and availability depends on your computer configuration).

Next, I recommend opening the tab "improvements" and see if it's enabled "Loudness" (by the way, in some versions of Windows it is called as " Additional features / volume leveling").

Save the settings and check if the sound has changed, if it has become clearer.

Lack of an up-to-date sound driver/driver setup

In general, usually, with problems with drivers - there is no sound at all. But modern versions of Windows (8, 8.1, 10) install drivers automatically. There is nothing wrong with this, on the contrary, they make life easier for novice users. But there is one big "BUT" - the drivers installed by them, usually, cannot be configured; there is no extra. panels where important parameters for your equipment are set. As a result, some sound distortion may occur.

In order not to repeat how to check if there is an audio driver in the system, how to find and update it, how to remove the old driver, etc. - I recommend to read this article:

You may also need programs to automatically update drivers in the system. I talked about them in this article:

I also recommend that you pay attention to the configuration of the driver itself. To open the audio driver settings: go to the Windows control panel in the section "Hardware and Sound" . Further at the bottom of the window, usually, there is always a link to the setting: in my case, this is Dell Audio (in yours, for example, it could be Realtek Audio).

In the audio driver settings, check the volume of the main devices ("play around" with it), disable various "incomprehensible" enhancements, filters, etc. Very often they cause all kinds of problems with sound.

Testing speakers on another PC

If the above recommendations did not work, I highly recommend connecting your speakers or headphones to another device: laptop, TV, PC, etc. You need to do this in order to determine the source of extraneous sound:

- either the speakers are "to blame" (if the sound is noisy on other devices);

- either the system unit itself is "to blame" (if the speakers behave normally when connected to other sound sources).

The reason may be grounding ...

Grounding (sometimes called grounding) in ordinary residential buildings, most often, they do it in the basement. All outlets in the building are connected to this ground. If all equipment (including speakers) is connected to the same outlet, then problems with interference due to grounding usually never arise.

If the noise is caused by grounding, then the easiest way to get rid of this is to connect all the equipment to the network through one common network outlet. It is even better if a surge protector (not Chinese, but normal quality, or UPS) is connected to the outlet, to which a PC and speakers will be connected.

The photo below shows a surge protector for 5 outlets. Enough for most ordinary home PCs, you can connect: a monitor, a system unit, speakers, a printer, and even a phone charger will remain ...

Important! In the absence of grounding, some authors recommend connecting the system unit case to a conventional battery. I do not recommend doing this categorically (with a certain network construction - you can be shocked)! In general, the issue of grounding is best dealt with by an electrician.

Mouse wheel noise

Sometimes the noise from scrolling the wheel from the mouse "falls" into the audio interference and is heard in the speakers. Sometimes such noise can be quite strong and it is simply impossible to listen to music while working.

If the sound from the mouse is heard in the speakers, then I recommend taking the following series of measures:

Try to replace the mouse with a new one;

If you are using a mouse with a PS/2 connector, replace it with a USB one (or vice versa);

You can also use PS/2 to USB adapters. For example, by connecting a mouse with a PS / 2 connector to a USB port;

Try using a wireless mouse.

The photo below shows: a mouse with a PS / 2 plug, a USB mouse, and adapters from PS / 2 to USB.

Mobile phones and gadgets

If your mobile phone is too close to the speakers, then when you call it (or receive SMS), you can hear a strong crackle and interference. You can, of course, try to shield the audio cable, but at home, in my opinion, all this is a waste of money, time and effort.

The best way out is to find a place for a mobile phone not on a computer table, or at least smash the phone and speakers in different corners. Thanks to this, crackling and noise will be significantly reduced.

By the way, this can be observed from walkie-talkies, cordless phones and other similar gadgets and set-top boxes. Anything with an antenna and radio signals can potentially be the source of the strongest vibrations reflected in your speakers.

In some cases, even an ordinary printer/scanner/copier, an "unusual" table lamp can cause noise in the speakers. Therefore, at least for the time of diagnostics, I recommend turning off extraneous devices located near the speakers one by one and monitoring the condition and purity of the sound.

I don't think there's anything more to comment on...

High volume on low-quality speakers

Loudness above 50% on inexpensive low-quality speakers (and headphones) may well be the cause of the noise. (they say that the speakers start to "flash").

In general, all the speakers and headphones are phoning. True, better speakers (and, as a rule, more expensive ones) produce a clearer sound even at high volumes, and only emit light at maximum. While cheap - when the volume reaches the average values ...

Also pay attention to the microphone. If your speakers are turned on loudly and the microphone is working, then the effect of a closed "ring" may be observed.

Low Power (Eco Mode)

This advice is more suitable for laptop users...

The fact is that laptops have several operating modes: economical mode, balanced, and high performance. Manufacturers do this in order to save battery power more economically.

In some cases, reduced power consumption does not allow you to produce high-quality sound. Therefore, I recommend going to the Windows control panel: Control Panel\Hardware and Sound\Power Options . Then enable high performance and save the settings (see screenshot below).

Installing an external sound card

For some reason, many people think that an external sound card is some kind of large device, expensive, etc. All this is in the past, now there are modern sound cards, the size of which is slightly larger than a USB flash drive (and they look almost the same).

Yes, you can't connect any specific equipment to such a sound card, but you can connect ordinary classic headphones and speakers, a microphone to it, which is more than enough for many "average" users.

In addition, an external sound card can simply help out and help get rid of extraneous noise when other options did not solve the problem. Moreover, the cost of many models is more than affordable (the cheapest options cost no more than a few hundred rubles).

The photo below shows a USB sound card. Such a small "baby" is capable of producing a fairly high-quality sound, which will be envied by some of the built-in sound cards. And in principle, it will suit most users who are satisfied with the most "normal" sound.

That's all for me. Additions on the topic are welcome...