Music center hum in the speakers. Hissing, noise, crackling and other extraneous sound in speakers and headphones - how to find and eliminate the cause? Causes and elimination of extraneous sound in speakers and headphones
Answers:
Alexey:
The center is apparently connected to the computer by two or more common wires, the second - perhaps the center has too much input resistance, try placing two 100 - 200 Ohm resistors at the end of the wire (near the center), this should help significantly. And the third thing that comes to mind is that one of the wires is broken, maybe the common one, or maybe the computer and the center are grounded to the same point or to the same 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 audio system, or even the motherboard.
Tsyupka Roman:
The wire must be shielded.
Sergei M. Komarov:
To avoid background noise, 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 channels), the third is simply connected to the ground of the center (for example, I have the third wire connected to the antenna socket, which should pick up the radio).
TU-154:
The reason may be interference from the computer's power supply or from the monitor. The background is most noticeable on integrated sound cards and practically disappears on normal sound cards. In addition, the connecting wire must be shielded and, preferably, the system unit case must be grounded.
Yuri Alexandrovich Peysakhovich:
1. The connecting wire must be shielded. 2. Connect the PC case and the center with a wire and, preferably, ground it.
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Question from a user
Hello.
I have a problem with my PC: there is some kind of extraneous noise coming from the speakers and headphones (resembles a crackling noise). I poked the wires - it didn’t help; I also rearranged the inputs - the problem did not go away. By the way, if you click the mouse, this noise intensifies a little. What to do?
Built-in sound card, Realtek (I don’t know the exact model). The headphones are new, the speakers are very ordinary, although they are already quite old (7-8 years old).
Good day!
In general, there can be a great variety of noises encountered in speakers and headphones: for example, the noise of a mouse wheel, various crackling sounds, whistling, intermittent and trembling noises, etc. They can appear for a variety of reasons.
The user problem with sound described above is quite typical (unfortunately), and it is not always so easy and quick to fix. However, in this article I will try to give all the most important points that you need to pay attention to first. By eliminating them, with a high degree of probability, you will make your sound better and cleaner.
If you have sound too quiet- try the tips from the following article:
If you have no sound at all on a computer - I recommend reading this guide:
Causes and elimination of extraneous sound in speakers and headphones
Cable for connecting speakers/headphones
1) Is the cable intact?
Many people don’t attach any importance to this (supposedly what will happen to it), and the cable, by the way, can be damaged accidentally: if you move the furniture carelessly, bend it, or step on your heel. In addition, many people have pets in their homes. In general, there are enough reasons without your direct intervention...
The photo below shows a damaged audio cable...
2) Broken audio connectors
Over time, any audio connectors begin to “weaken” (most often from intensive use) - and the plug is not clamped tightly into them, sometimes there is even a slight play (gap). If in this case you try to insert/remove the plug and twist it in the socket, you may notice how noise appears in the speakers and how they disappear. In this way, you can choose a position for the plug that will not produce noise. The cable can be secured with tape in this “ideal” position.
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 some adapters or extension cords). All this can cause “distorted” sound, a kind of interference. In general, I do not recommend using cables longer than 2-5 meters (in the most common situations, for household use).
4) Is the cable fixed?
Another reason that I had to deal with was the following: the cable from the system unit to the speakers was suspended, about 2 meters long. Naturally, if the window in the room was open, then the draft caused this cable to “dangle” and extraneous noise was observed.
Getting rid of the problem was very simple: using ordinary 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 convenient), pets, even your own legs (if the cable runs under the table). Therefore, my advice: secure (fix) or lay the cable so that no one touches it accidentally.
The photo below shows special holders/clamps that prevent cables from getting tangled and any wires from dangling. These Velcro holders can be placed at the back of the table and secure all the wires and cables. By the way, you can use regular tape instead.
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 side of the unit, and on the front.
Many users find it more convenient to connect headphones (sometimes speakers) to the front side of the unit - and often in this case the sound is not as high quality as if you connected it to the audio connectors on the back wall of the system unit. This is due to adapters, extension cords, and other issues with connecting the front panel (from the rear of the system unit - the audio outputs go “directly” from the sound card).
In general, the motive behind this advice is simple: try connecting headphones/speakers to the audio outputs on the back wall of the system unit.
6) Is the cable intertwined with other cords?
Also, background noise and extraneous noise may appear in the speakers due to the fact that the audio cable is too “tightly” intertwined with other wires. Try to carefully position it so that it is away from the rest. By the way, this advice overlaps with fixing the cable (see just above).
And one more tip: If you experience hissing and noise in your speakers, try connecting headphones instead (or vice versa). This will not solve the problem, but it will help find and diagnose the cause. If there is no noise in the headphones, then the reason probably lies outside the system unit (which is already something...).
Incorrect sound settings in Windows
Often, extraneous noise in the speakers is associated with not entirely “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 device through which the default sound comes (such a device is marked with a green checkmark).
Note: by the way, if the default device for sound playback is selected incorrectly, 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 is enabled "Loudness of Compensation" (by the way, in some versions of Windows it is called " Additional features/volume equalization").
Save the settings and check if the sound has changed or become clearer.
Lack of current sound driver/driver settings
In general, usually, when there are 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 they install usually cannot be configured, i.e. there is no extra panels where important parameters for your equipment are set. As a result, certain sound distortions may occur.
In order not to repeat myself about 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 reading this article:
You may also find programs for automatically updating drivers in your system useful. I talked about them in this article:
I also recommend paying attention to the settings of the driver itself. To open audio driver settings: go to the Windows Control Panel in the section "Equipment and Sound" . Further at the bottom of the window, there is usually always a link to the settings: in my case, this is "Dell Audio" (in yours, for example, this could be Realtek Audio).
In the audio driver settings, check the volume of the main devices (play around with it), disable various “obscure” improvements, filters, etc. Very often they are the cause of all sorts of sound problems.
Checking speakers on another PC
If the above recommendations do not give any effect, I highly recommend connecting your speakers or headphones to another device: laptop, TV, PC, etc. This must be done in order to determine the source of extraneous sound:
- either it’s the speakers’ fault (if the sound on other devices is noisy);
- or 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 sockets 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 equipment to the network through one common power outlet. It’s even better if a surge protector (not Chinese, but standard quality, or UPS) is connected to the outlet, to which the 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 there’s also room for a phone charger...
Important! In the absence of grounding, some authors recommend connecting the system unit case to a regular battery. I categorically do not recommend doing this (if the network is built in a certain way, you may get an electric shock)! In general, the issue with grounding is best resolved with an electrician.
Noise from mouse wheel scrolling
Sometimes the noise from scrolling the mouse wheel gets 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 you hear sound from the mouse in the speakers, then I recommend taking the following series of measures:
Try replacing the mouse with a new one;
If you use 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 an SMS), you may hear a strong crackling sound and interference. You can, of course, try to shield the audio cable, but at home, in my opinion, this is all a waste of money, time and effort.
The best way out is to find a place for your mobile phone that is not on the computer desk, or at least place 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, radiotelephones and other similar gadgets and set-top boxes. Anything that has 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 or an “unusual” desk lamp can cause noise in the speakers. Therefore, at least for the duration of the diagnosis, I recommend turning off any extraneous devices located near the speakers one by one and monitoring the condition and purity of the sound.
I think there is nothing more to comment here...
High volume on low-quality speakers
Volume above 50% on inexpensive low-quality speakers (and headphones) may well be the cause of noise (they say that the speakers are starting to make noise).
In general, all speakers and headphones produce noise. True, higher-quality speakers (and, as a rule, more expensive ones) produce clearer sound even at high volumes, and only produce noise at maximum. While cheap ones - when the volume reaches medium levels...
Also pay attention to the microphone. If your speakers are turned on loudly and the microphone is working, then a closed “ring” effect may be observed.
Low power supply (Eco mode)
This tip is more suitable for laptop users...
The fact is that laptops have several operating modes: economy mode, balanced mode, and high performance. Manufacturers do this in order to use battery power more economically.
In some cases, reduced power consumption does not allow for high-quality sound. Therefore, I recommend going to the Windows Control Panel: Control Panel\Hardware and Sound\Power Options . Then turn on 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 a thing of 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 cannot connect any specific equipment to such a sound card, but you can connect ordinary classic headphones and speakers, and 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 fairly high-quality sound, which will be the envy of some built-in sound cards. And in principle, it will suit most users who are satisfied with the most “ordinary” sound.
That's all I have. Additions on the topic are welcome...
Instructions
First you need to determine the cause of extraneous noise in the speakers. Most often, this may be due to poor shielding of the amplifier and/or cable. To check this, hold the cable in your hand. If the noise becomes louder after this, simply 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 may occur due to a lack of grounding. Cheap enclosures often allow electrical signals to pass through, causing interference throughout the entire system. To solve this problem, it is recommended to ground the computer. The simplest option is to connect the case, for example, to a battery. Thus, the tension from the case will be removed and the noise will disappear.
Try setting up your speaker mixing system. To do this, go to the Start menu - Control Panel - Sound. In the “Playback” tab, find your speakers, right-click and select “Properties” from the menu that appears. Then in the window that opens, find the “Levels” tab and disable the “Line In” function in it.
If all of the above methods do not help fix the problem, there is only one thing left to do - purchase new speakers.
Sources:
- Why do the speakers sound when I turn off the computer?
All equipment tends to fail sooner or later. The speakers seem to be practically new, but gradually a strange noise becomes more and more clearly audible. 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.
Instructions
There are many sources of noise. The most annoying thing is when the noise in the speakers or TV is caused by a ringing mobile phone. In this case, it is quite difficult to completely get rid of the noise in the speakers, but it is possible to reduce 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 that connects the speakers to the computer or music center. It would be better if the plug was in a metal case. You need to inspect the signal wire that leads from the speakers to the computer. Each wire must have separate or double shielding.
It is also necessary to replace all the old wires with shielded ones inside the speakers. It is better to move the power filter inside the column. Then you should purchase shielding paint and a brush from a construction supermarket, disassemble each column, carefully paint it and let it dry for several hours. If it is not possible to purchase paint, ordinary aluminum foil will help solve the problem. It needs to be used to cover all existing speakers from the inside. After these simple but labor-intensive procedures, the noise will not appear at all, or will be insignificant.
If, after connecting speakers, one of which contains an amplifier, slight noise occurs when the wires or mouse move, grounding is required. If there is a ground, the problem may be a poor-quality power supply. Changes in current consumption occur when moving optical and magnetic heads, scrolling text and other actions. The drive motors require more current, forcing the processor to redraw parts of the screen in response to the scroll motor moving, which causes current surges and changes in power consumption.
This interference can be suppressed only with proper wiring of power circuits, installation of a high-quality power supply and blocking capacitors. The sound and system boards are responsible for blocking and wiring, but the power supply plays the main role. The problem can be resolved by replacing the power supply.
Video on the topic
note
Computer speakers always have magnetic shielding, but ordinary speakers are not provided with such functions.
Helpful advice
Separate power supply to the sockets of the system unit and the monitor helps to remove noise in the monitor, that is, you need to plug in the monitor into one socket and the unit into another.
Any noise is characterized by a strong non-periodicity of the vibration shape: either it is a long vibration, but very complex in shape (creaking/hissing), or individual emissions (knocks/clicks). But in any case, noise vibrations will consist of a large number of harmonic ones, but with different frequencies. And the more of these frequencies there are in the spectrum, the stronger the noise will appear.
