Why do you hear an echo on a cell phone? Why can I hear a conversation on the phone? Why can I hear myself on the phone when talking on a mobile phone? The main signs of wiretapping a mobile phone

Help Desk Agent 28/10/2017 09:51

Modern smartphones are multifunctional devices; they can be used as a web camera, game console, multimedia player and even a personal computer. However, the main purpose of any mobile phone remains to provide high-quality voice communications over the cellular network. Therefore, it is extremely unpleasant for the owner when his device does not allow comfortable calls.

Judging by the forums, one of the most common problems is the echo in the phone during a conversation. Its essence lies in the fact that you or your interlocutor begin to hear your own voice, which comes with some delay. The result is such a cacophony that it is simply impossible to talk.

Let's look at the reasons why this problem occurs and provide tips on how to fix them.

Why do you hear an echo when talking?

First of all, it should be understood that echo is an integral companion of any conversations at a distance, since the transmission of an analog or digital signal takes a certain time, and sound tends to be reflected and returned. And the more distant the interlocutors are from each other, the more clearly this phenomenon will manifest itself.

Before the advent of cellular communications, echo was also a constant presence in conversations on a regular home telephone. However, the delays in signal transmission over the wires are so minute (on the order of a few milliseconds) that the speaker’s voice practically merged with his own voice returning back, so there was no discomfort.

Everything changed with the advent of cellular communications, and especially modern good smartphones with Internet telephony. Now, due to the many stages of signal processing and conversion, delays in its transmission have become very noticeable. This most often occurs when calling from a mobile phone to a landline. When going from a local line, which is usually a two-wire line, to a four-wire main line, part of the signal is reflected.

To combat echo in mobile phones, operators install special echo-compensating devices on their terminals, the operating principle of which is based on the subtraction of the direct signal and the reflected one. However, such systems do not always work perfectly; they require adaptation to each specific session and fine tuning. And sometimes they don’t cope at all if the echo occurs due to a malfunction of the telephone.

What to do?

So, you have discovered an echo during a conversation, let's list the possible reasons for its occurrence.

What should you do if you hear an echo on your phone during a conversation? And in general, why is this phenomenon observed? These questions arise among citizens more and more often. In fact, telephone echo can be due to various reasons. Sometimes it is possible to resolve a situation without any problems, but in some cases this cannot be done. In general, if a subscriber has the described problem, he will have to go through several options for the development of events, the diagnosis of which is very difficult without outside help. So what should you do if you hear an echo during a conversation? Why is this happening? How dangerous is the phenomenon?

The first step is to understand how realistic it is to solve the problem. Perhaps there is no way to eliminate the echo in the handset that is interfering with the conversation?

As practice shows, echo during a telephone conversation is a phenomenon that usually needs to be corrected. And without radical actions. Accordingly, do not be alarmed if this problem occurs. But what causes an echo in the tube? And what to do in this or that case?

The most obvious option is a manufacturing defect. Relevant for new phones. It is likely that the device was faulty to begin with. As a result, an echo is heard when talking.

It is worth paying attention to the fact that the problem begins to bother the buyer immediately after the first call. That is, from the very beginning. You can act in several ways:

1. Send your phone in for repair. If the reason is not a defect at all, but some kind of breakdown, then it will definitely be fixed. And you can pick up an already working device.
2. Exchange the gadget in the store and write a complaint about the purchase of a defective product. This is relevant if the echo is detected immediately after purchase. Usually sellers quickly exchange defective phones for working ones.

However, marriage is only one of the reasons. It has already been said that it is detected immediately after you start using the phone. What situations occur most often in real life?

Why can I hear an echo on my phone during a conversation? Sometimes subscribers complain about exactly this situation. Moreover, regardless of the services of which operator they use. Why can you hear your interlocutor or yourself repeatedly?

It is likely that the volume of sounds is to blame. Or, as people say, phone settings. The other person's speaker or microphone is too loud. Because of this, the mentioned problem occurs.

Why do I hear an echo when talking on the phone? If the device has been in use for a long time, it is possible that a bug is installed on the mobile phone. He helps someone wiretap phone conversations. This is where the echo comes from.

Fortunately, such a situation is extremely rare. If you suspect wiretapping, you can take your mobile phone to a service center, report your suspicions and wait for the diagnostics and repairs to be completed. This technique is the fastest, most logical and simplest solution. After all, it is very difficult to get rid of a bug on your own.

Factory Feature

If an echo occurs while talking on the phone, do not be alarmed. And immediately think that a low-quality product was purchased, too. The thing is that each mobile phone has its own “stuffing”. That is, all phones are designed differently. The cause of the problem may be a factory feature.

That is, the phone was originally assembled in such a way that an echo would be heard when working with a mobile network. Mainly relevant for older models of gadgets. The solution is only 2 options:

1. Deal with the echo. You will have to listen carefully to the words. But sooner or later it will get boring.
2. Buy a new phone right away. It is advisable to make a test call before making a purchase.

There are no other solutions for this situation. How to remove echo on your phone when talking? It all depends on the cause of the problem. What other control methods should you pay attention to? For example, what if all the previously listed scenarios do not explain the resulting echo?

In such a situation, only a service center will help. Or buying a new phone. But we are not talking about the features of the mobile phone device. An echo on the phone during a conversation may occur if the speaker is broken.

A fairly common problem faced by subscribers who do not monitor their mobile phones. If your phone has been dropped or dropped into water, it is likely that an echo problem will occur.

By the way, if you leave this phenomenon unattended, eventually the speaker will refuse to work at all. That is why, after some negative impact on the phone and the appearance of the specified problem, you need to contact a service center. There the speaker will either be repaired or replaced. Luckily, in most cases you don't need to buy a new phone. But you shouldn’t expect that a repaired speaker will last a long time.

Housing tightness

An echo in the phone during a conversation can occur if the seal of the gadget’s case is broken. The situation does not occur too often, but it is very problematic to deal with it.

If the subscriber is wondering how to get rid of the resulting echo, you can suggest the following steps:

1. Take the phone to a service center. They will be able to conduct a full diagnosis and fix the problem. Although few people are engaged in correcting the tightness of the case.
2. Change body. This method does not always work. The body panels need to be replaced with denser ones. You can buy these components in any store, depending on the model of the gadget.
3. Change phone. The most logical, although not the most pleasant, solution. It is almost impossible to fix device seal problems. This is why you often have to buy new mobile phones.

To combat the echo that occurs when calling a regular landline phone, there are special echo suppressors. These devices identify human speech coming from one end of the connection and suppress all signals coming in the opposite direction.

As you can see, the problem is not solved without costs in all cases, but it can still be solved. By the way, echoes can occur due to the fault of listening devices; here you need to read less books about spies.

On the Internet, there are many programs that can secretly work on your cell phone and save or send recordings of telephone conversations, SMS text messages, subscriber location coordinates, as well as pictures from the built-in front camera of your device to a specific address.

There are programs that work on the principle of a spy bug: you call a mobile phone and, secretly from its owner, hear everything that happens next to it. This is applicable for a variety of, usually selfish, purposes, such as eavesdropping on business negotiations or important meetings.

The main danger of such wiretapping comes from smartphones and communicators based on the WindowsMobile and Symbian operating systems. Also, these spyware programs are already available for the iPhone, but they can only be installed on a jailbroken Apple smartphone, and, of course, you will not find these applications in the official App Store.

It is very difficult for an ordinary person to understand that such a “bug” has crept into your phone. However, there are a number of certain signs that can tell you that eavesdropping has occurred.

1. Rapid battery drain. If your phone's battery begins to discharge suspiciously quickly, but your signal reception level remains the same, and the device has recently been used in normal mode, it is quite possible that some hidden process of an unknown application has been activated in it. Of course, all batteries wear out over time and begin to “hold a charge” less, so you should take this fact seriously only if your device begins to discharge suspiciously sharply.
2. The battery gets very hot. If your mobile phone battery gets too hot, it will drain quickly. This wave effect is normal during a conversation, especially in UMTS or IMT-2000 (Skylink) networks, but if your phone lay peacefully for several hours in complete peace, and not on the windowsill in the direct rays of the summer sun, but still, at the same time, remains quite warm, it is quite possible, as in point 1, some hidden process is working inside it.
3. Delay when turning off the device. Pay attention to the shutdown time of your mobile phone. If it does not happen immediately and with an unnaturally long delay, is accompanied by flashing of the display backlight and keys, or the phone cannot be turned off naturally at all, then something wrong is happening to the phone. Of course, this may just be a technical fault, but other options are also possible.
4. Unnatural behavior of the phone in general. If your mobile phone itself begins to turn on the screen backlight, periodically reboot, turn off, automatically install and launch some applications, then this could be either incorrect operation of its software (firmware), a virus picked up somewhere, or again some kind of a hidden process responsible for listening to your line.
5. Interference and interference during conversations. This interference and background noise are of two types: those heard during a conversation and those that occur when the cell phone is in close proximity to the audio speakers. We are interested in the first option. Interference during a conversation is quite natural if the base station is very far from you, the phone operates at a frequency of 900 MHz, is connected to old analogue telephone exchanges, or the subscriber is roaming. However, in some cases there are still quite suspicious noises, clicks, hissing or echoes during a conversation with anyone. Therefore, if this noise has been haunting you for several days, you are confident in your phone and your connection has not deteriorated, it is worth considering who might be interested in your conversation. Also abnormal may be an intermittent “gurgling” sound coming from your phone when no one is talking on it. It could very well be a spy app that connects to another phone to transmit ambient sounds in your room.

We hope you will avoid this kind of trouble and your personal affairs will remain exclusively under your control.

Greetings!
Chinese electronics manufacturers never cease to amaze. But the quality of the devices is still an outright lottery!

In the vastness of Aliexpress you can find a variety of mobile phones from nameless Chinese manufacturers. An example is “Servo” devices - in fact, they are a standard no-name (nameless manufacturer), with appropriate quality.

However, the tubes from this manufacturer are impressive due to their functionality. For example, in the line of this “manufacturer” there are devices that can work with 4 SIM cards simultaneously in standby mode, secure phones (in fact this is not the case), a power bank phone, etc. This is what is captivating about Chinese creations, because it is often not always possible to find a similar solution among first-tier manufacturers.

However, after the purchase, indignation arises, as well as outright disappointment with the quality, regardless of the presence or absence of a hairpin on a typical Chinese device. In some cases, the microphone causes criticism (the interlocutors cannot hear you well), and in some cases, along with your voice, background noise is also transmitted into the line.

This noise is interference into the sound path from the transmitting/receiving antenna of the device. Famous brands do not make such mistakes, and this problem is unlikely to arise even in the cheapest dialers. But in Chinese devices this problem still pops up to this day. A flaw in the design, poor assembly, savings on components - in fact, all this is not important.

The owner first needs to understand that this problem is hardware in nature. You might be wondering why this noise doesn't always occur? The fact is that the transmitter power varies and depends on how far the device is from the base station at a given moment in time and what the level of its signal is.

What to do in this situation? Definitely send the phone back to the seller, because... This problem cannot be solved by any firmware. This is clearly a hardware problem that can hardly be solved at home. It is quite possible that the screen is there, but it is poorly soldered. But do not rush to arm yourself with a soldering iron and correct this defect, because the components of modern devices are placed so close to each other that the “invasion” of an ordinary soldering iron into the device’s circuit is fraught with serious consequences. If repaired, then only with the use of special equipment. equipment.

It’s sad that Chinese manufacturers have concentrated on smartphones, and have completely forgotten the good old push-button devices, moreover, with support for multiple SIM cards.

It was Chinese manufacturers who at one time introduced multi-SIM devices, which is why it is surprising that it is now so difficult to find a decent solution that would support work with three or four SIM cards.

I really hope this is temporary. Smartphones to this day have not offered a worthy replacement - not only does the operating time leave much to be desired, but there are practically no representatives who could offer support for three.. four SIM cards.

At first glance, it may seem that when two subscribers are connected, their conversation occurs as naturally as in ordinary life. It’s as if they are connected to each other by one pipe into which you can speak and from which you can hear at the same time. In networks with analog telephones, the situation is similar only in the interval from the subscriber to the PBX (more precisely, to the cross node). But in digital, a completely different picture begins right from the terminal.

There are more than one such conventional “pipes” between subscribers. According to one, the encoded information moves in one direction, and according to the other, in the opposite direction. Moreover, encoding and decoding the signal is associated with delays. To transmit a packet (or frame) of information, it must first be accumulated. In the transmission nodes of the network along the route, reception and transmission occur, which means an additional delay. But still, these two “pipes” are connected at the end nodes. This merge/split is done by the Hybrid mentioned in another answer. But even if one “pipe” was connected directly to the microphone, and the other to the earphone, then the signal coming from the opponent, although weakened, will inevitably get into the microphone. (Sound in the air, vibration of the handset itself, etc., not to mention the situation when using a speakerphone.)

It turns out that what you said into the phone will reach the other side and come back to you with a delay.

So what happens, the echo is fatal and inevitable? A device called an echo canceller comes to the rescue. There are semi-sets of echo-cancelling devices that work directly in digital terminals (or on cross-connections in tax networks). And there are also sets of echo cancellers that work in the middle of the signal path. They "remove" the echo. There is no magic there - pure mathematics. Just before sending any signal you need to compare it with the signal that just arrived, and the incoming signal needs to be weakened (multiplied by the number 0<x<1) и вычесть его из отправляемого. Разницу и отправлять.

As you understand, if this x If it is too small, then the echo will still leak through (undercompensation), and if it is too large, then distortion will be introduced. The same echo, only upside down (hypercompensation).

It takes some time to adapt the echo canceller until it selects the optimal operating parameters. In addition, interference can temporarily unbalance the operating parameters. Then, right during a conversation, the echo may increase. Finally, echo cancellers may simply be poorly configured by the network operations team.

A slight undercompensation, if it gives an almost imperceptible echo and does not interfere with the speaker, is quite acceptable and is dealt with. The network operator should complain about the echo. They fix it - it's their responsibility.

You hear an echo, that is, a reflection of the signal. This interference is a consequence of feedback, when the subscriber's microphone at the other end of the “wire” picks up the signals of your voice from the speaker. It is not your device that is to blame for this, but the device of your interlocutor. If the “complaint” came from your interlocutor, then we can recommend reducing the volume of your phone’s speaker. If your phone is “packed” in a case, remove it or replace it with a more suitable one.

The telephone does not always act as an interference during conversations. Cellular network operators may also experience interference. In this case, you need to contact the subscriber service of your operator, explain the situation and wait for the results of eliminating the interference.

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Why can you hear yourself when talking on the phone?

The most common reason for the unpleasant phenomenon of hearing one’s own words after a short delay when talking on the phone is being in an area of ​​uncertain reception. In other words, the signal is too weak. To combat this problem, there are special echo suppressors. An echo canceller is a device that identifies human speech coming from one end of a connection and suppresses all signals coming the other way.

It is worth noting that reverse echo may appear when listening to a conversation. However, this reason can be considered unlikely.

Also, the reason for the constant reflection of speech may be a software glitch in the phone. In this case, it is better to contact a repair shop to diagnose the problem.

Experts identify another reason for the occurrence of echoes when talking on the phone - a “gray” (fake) or a very simple mobile phone. In this case, the solution to the problem will be to buy another high-quality model. This effect occurs when there is an error in the design of the mobile phone case and the manufacturer wants to save on a special electronic element.

Among the reasons for echoes when talking on a mobile phone is the presence of your operator's base station transceiver nearby. To solve the problem, just change the location.

In fact, if a conversation reflection (echo) occurs, it will be enough to simply call back or reduce the volume of the speaker and the echo during the conversation will disappear.

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You need to buy a phone with echo protection.

If you hear an echo, you can mute the call. The echo is caused by the inability to fully connect two phones together, that is, due to a weak signal in the phone, an echo begins.

Disabling the calling phone and redialing the number is the only way to solve the problem.

Why do I hear myself when talking on the phone?

In addition to the above reasons for the occurrence of an echo when talking on a mobile phone, there may be another reason: wiretapping. No matter how strange it may sound. But echoes during a conversation may not always be the cause.

This can also happen due to the subscriber being between two network coverage areas, that is, the canopy cannot determine which network the phone belongs to.