They are becoming more widespread. Smartphone manufacturers themselves are pushing people to make a purchase by eliminating the 3.5 mm audio jack from new models. Everything would be fine if not for one “but”. The sound quality of wireless headphones is most often average or even low. The user may also experience sound delay in Bluetooth headphones. What caused these two troubles? Really? large companies still can’t figure out a normal method for transmitting sound through the air?
If you can easily put up with average sound quality, then when the music is interrupted, it quickly drives you crazy. These second or even half-second pauses force you to return to wired headphones, connecting the accessory at least through an adapter.
Unfortunately, it is almost impossible to find out the exact causes of micropauses. The fact is that Bluetooth is very different from the same Wi-Fi - this method of signal transmission is less standardized, and the “blue tooth” often does not have enough power. If Wi-Fi easily penetrates even through the walls of the house, then even the lining of a jacket can interfere with the Bluetooth signal. That is, try taking your smartphone out of your inner pocket - it is possible that the purity of synchronization will improve significantly.
Unfortunately, the sound in Bluetooth headphones is delayed even when the accessory is located right next to the smartphone. This indicates low compatibility of the chip in the headset with the module located in the phone. It is possible that some inappropriate codec is being used last. After all, if you didn’t know, it is not analog, but digital sound that is transmitted through the air. The headphones still need to decipher it, only after that the playback occurs. If the electronics in the product are not the most powerful, then micropauses may actually occur from time to time.
If you are just about to buy Bluetooth headphones, be sure to check out technical characteristics accessories. Try to choose a copy that supports exactly those profiles that are built into the Bluetooth of your smartphone. It is also desirable that the “blue tooth” version be the same. In particular, now many smartphones have Bluetooth 4.0 on board - a wireless headset should also have a similar version.
If the headphones are connected to a computer, then to eliminate sound interruption you can “fiddle” with the settings music players. Change the audio output from DirectSound to WaveOut - sometimes this can help. Unfortunately, there are noticeably fewer Bluetooth connection settings in smartphones, so you can’t really indulge in experiments here.
Bad sound
Sound quality depends on several factors. This parameter is mainly affected by the Bluetooth version. Each new version introduces some new profiles and technologies. For example, now smartphones and wireless headsets are gradually switching to the AptX HD codec, which provides almost CD-quality sound transmission. If you are not limited in financial resources, then it is better to purchase an accessory that supports just such a codec. But do not forget that then you will also need an appropriate smartphone.
The sound quality also depends on what music files are being played. Pay attention to the bitrate of MP3 music - files with a parameter of 320 Kbps will have the best sound. Real music lovers should switch to files with a lower compression ratio - for example, FLAC. Such music will weigh more, but when saving these compositions, too high or too low frequencies were not cut out. However, an increased bitrate can lead to micropauses - the data transfer speed via Bluetooth is severely limited.
Of course, first of all, sound purity depends on the design of the headphones themselves. It's stupid to expect good sound from the simplest “plugs” for 2000 rubles. Do you want to enjoy music without using wired connection? Then you will have to fork out for an expensive headset from a well-known manufacturer. Having trouble choosing? Focus on the selection.
Conclusion
Alas, but modern wireless technologies, which serve to transmit sound, do not allow you to somehow play with the settings. If any problems arise, this most often indicates poor compatibility between the headphones and the smartphone. And if the sound is not good enough, the faulty design of the headset (or a weak chip) should be blamed. That's why you shouldn't skimp when choosing wireless headphones.
Despite the ease of operation, sometimes we still encounter certain problems, such as extraneous sounds similar to hissing and wheezing, due to which the overall sound quality deteriorates significantly. To fix this problem, you need to know possible reasons her appearance.
It is important to know that, despite all the elementary of this device, to a person who has not previously had to deal with problems in his work and eliminate them, this problem may seem very serious.
In order to understand where the hiss in headphones comes from, you need to understand at least a little about how they work. Pay attention to whether you hear hissing sounds constantly or only periodically.
One of the reasons why this problem may occur is incorrect connection headphones, or rather, choosing the wrong settings. In addition, if the headphones are not new, check whether the contacts with which you connect them are working properly.
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Noise in headphones caused by faulty sound card
A detail such as a sound card has a direct impact on how well the melody is reproduced by the equipment. If the part is faulty, Personal Computer cannot convey accurately sound signals, because of which the normal sound is complemented by hissing, crackling, the sound seems to “break” and “jump”. In this situation, only replacing the faulty part will help, and then the sound will no longer be accompanied by extraneous noise.
Faulty wires
The manufacturer of the model is often responsible for the correct operation of the headphones and the correct transmission of sounds.
You should know that there are two types of headphones: wireless and wired. Extraneous sounds, as a rule, appear in models that operate via a cable connected with a plug. If the copper core of the cable is damaged or stretched, noise interference and intermittent interruptions in sound appear.
A damaged wire often leads to noise in the headphones on an iPhone. This is due to the fact that the cable material is thin and flexible, it breaks easily. A damaged conductor sends sound card the signal characteristics are incorrect, and this is reflected in the sound. How to eliminate wheezing in headphones? This can be done by removing the torn or exposed section of the wire; in extreme cases, you will have to buy new fittings.
Broken USB input
Incorrect sound may occur after connecting other gadgets to the USB connector. The problem could be caused by a mouse or a faulty keyboard. In this case, when you press a key, you will hear clicks. There are quite objective reasons, why is this happening.
When information is transferred, the load on the PC increases. To reduce it, you need to do the following:
1. Switch the plug to another port.
2. You can also purchase a splitter and repair the old connection sockets.
3. Start using wireless devices.
The problem is that very often users do not pay due attention to their computer and do not immediately repair problems that appear. As a result, the USB connectors one after another become unusable, and only one remains, into which a splitter is connected, and it is on it that the entire load falls, which causes its increase.
How to properly wear in-ear headphones 
Mouse noise
When you scroll the page with your mouse, sometimes you may also notice noises, sometimes they are simply unbearable. The solution to the problem is to replace the mouse, switch the mouse to an adjacent USB port or installing an external sound card.
Lack of grounding of sockets
This problem does not occur often, but still occurs, interfering normal operation headphones. Lack of grounding can also cause crackling, clicking and other noise in the headphones. If you have already checked your headphones and found no problems, also check the outlets to which your computer is connected.
This nuance only applies desktop computers, Laptop boards are usually grounded during their manufacturing stage.
When you use headphones connected to a laptop, incorrect sounds are most likely caused by internal malfunctions of the device. Do not delay in contacting service center, where your device will be diagnosed for problems.
The sound source itself does not work correctly
Violating the rules for using headphones often leads to disruption of their operation, and in particular to the sound. Problems also arise in the operation of the main sound source. Rarely, driver errors still occur. Program errors and malfunctions operating system cause interference in the form of noise and crackling.
The problem can be detected by testing the device by connecting various headsets. If their work is equally unacceptable - unpleasant sounds will be heard in all headphones, then the problem is hidden in the device driver.
If you are used to listening to music at very high volumes, you may also notice the appearance of hissing and crackling. As a rule, this happens if you purchase inexpensive headphones.
Insufficient power supply is another reason extraneous noise when headphones sound (this problem sometimes occurs among laptop owners who have not yet figured out all its features). Fixing this problem is simple by using the following tips.
On your laptop, go to Control Panel, then System and Security, and finally Power Options, and select High Performance mode. Once setup is complete, check the sound quality in your headphones.
Currently, there are many types of different Bluetooth headphones, headsets and speakers to choose from that receive sound using this protocol. Very often, when buying inexpensive headphones, there are problems with sound quality, namely sound stuttering and lag. There are several ways to solve this problem...
The main problem with stuttering Bluetooth headphones is the quality of their manufacture and the incompatibility of standards. The problem may be a low-sensitivity antenna and the power of the processor built into the device. And accordingly, there may be a lack of power on the transmitting device: a computer, tablet, phone and bluetooth module inserted into the USB port of the PC, as well as incompatibility of the BlueTooth version.
It was also noticed that the headphones work well indoors, but outdoors the connection is constantly interrupted. In a room where there are walls close, the signal is reflected from the walls and hits the receiver wireless headset and everything works fine. Where there are no walls, sound is lost.
It has been noticed that the same headphones work fine on one smartphone, but stutter on another. And it happens that everything was fine, but after installation new program or application updates, sound desynchronization appears. This also occurs when the screen is turned off. mobile device or when the phone goes into locked mode.
Especially often, sound cuts occur when installing, deleting, or copying files from a flash drive to a flash drive. Since at this moment system resources are used. All this degrades the sound quality in the headphones. If this happens, then you need to keep in mind that the processor power is not enough to compress the sound and transmit it via the Bluetooth protocol.
Clean, loud noise without wires.
The main advice is, before you buy a Bluetooth headset, check its playback quality, as they say, “without leaving the checkout,” right in the store. If this is not possible, keep the receipt and packaging of the goods to return it back to the point of sale.
What to do if the product cannot be returned to the store?
How to solve the problem of sound stuttering in bluetooth headphones?
1.If you have a PC and the USB bluetooth module is inserted into the rear port of the computer. Then move the USB-Bluetooth to the front of the PC. Better yet, buy USB hub on the wire, lift it higher and plug the USB-BlueTooth module into it. If the Bluetooth adapter is old, then it is better to change it to a newer and more modern one.
Update Bluetooth driver in Windows Task Manager.
2.If you have a PC, change the drivers in the Device Manager to “Sound and Game Devices” and in the “BlueTooth” subsection. Here you need to start searching for drivers using Windows. To do this, select "Update".
If this does not help, then you should try setting different versions drivers and check if some can work.
When synchronizing with a PC, outdated models Bluetooth headphones may have compatibility issues with Windows drivers.
3. While outside, to avoid interruptions in music playback, place your smartphone as close to the headphones as possible. Move your smartphone from pocket to pocket, and the higher it is to the headphones, the better. Or put it in the top, inner pocket of your jacket. Do not use headphones in cold weather.
4.In the player settings or in the audio device settings on the PC, lower the playback quality of the audio stream, i.e. If you listen to music at 320kbps or more, try audio of no more than 128kbps. Audio mp3 files must be recorded at a low bitrate.
If you have a laptop with weak speakers and when playing another movie, the volume of the built-in speakers is not enough for comfortable viewing, then you can use tips for increasing the volume on your laptop or phone.
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5. Set the BT mode on the transmitting device to “Visible to everyone”. In this mode, the system loads the processor less.
6.Bring the devices closer to each other for a few seconds or pause the sound playback in the player or in YouTube, this is necessary to synchronize the devices. It may take a few seconds for the audio to fully sync.
7.In Android 6.0 in the settings there is an item: “Application permissions”, in it “Transfer via bluetooth”. Here you need to uncheck all the boxes except “Volume”. Here we click: “Change Settings” and select “Do not disable”.
8.The Android OS kernel can be overclocked via special programs types: SetCpu, Tasker, Antutu CPU, Tegrak, OverClock and others. Changing OS operating parameters is done in the "Performance" section. The following values need to be changed: Governor in “performance”, Scheduler in “cfq”. Another recommended solution is to install Kernel Adiutor with CPU Governor in the ondemand position (+ “Apply on boot” for convenience).
9.You can reduce the load on the system using special software. There is a program called Droidwall that can control Internet access for each Android OS application. To reduce the load on the processor, disable unnecessary this moment time for applications to access the Internet. This can be done through the program menu.
10. Re-soldering the antenna in the housing of headphones or bluetooth speakers. If you remove the housing cover, there should be a snake-shaped track on the board. Craftsmen solder a 4-5 centimeter piece of copper wire to this track. After this, the signal quality improves and the sound stops stuttering.
Video: My Ideal Wireless Bluetooth Headphones.
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11.You can also reduce the processor load on your PC by turning off the microphone on your Bluetooth headset. To do this, go to Control Panel => Sound => Recording => Microphone => Properties => Listen => uncheck “Listen to this device”. And restart your computer.
12.Interference from other devices greatly affects the quality of the connection. If a wireless speaker or sub is located next to a router, TV, computer, microwave and other sources of radio interference, then it should be moved away.
13.A poorly charged battery is the reason for the lack of processor power in the Bluetooth device.
14.Outdated models of Bluetooth headsets may not be compatible with new smartphones and vice versa. This is the main reason for instability and music stuttering. Therefore, before purchasing a wireless device, you should always check whether these two mobile devices will connect well.
You can read more about the BlueTooth protocol in the article on habrahabr.ru. There the process of signal loss is analyzed with screenshots and graphs.
Analysis of the impact of the human body on the power of audio data transmission via the BlueTooth protocol.
The picture above shows that the dump shows that the bitpool value for this portion of traffic is 48, but as soon as I blocked the path from the laptop to the speaker with my body, the bitpool value began to decrease, accompanied by interruptions and clicks.
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After the bitpool value settled down to 30, the clicks disappeared and audio playback became continuous again. Everything indicated that the codec performed auto-tuning, noticing degradation in signal quality.
But did I really introduce such a significant attenuation with my mortal body? Well, it's time to take a look at the graph indicating the power level of the received signal.