Joke Collection Website - Blessing messages - Why does the mobile phone have an echo?
Why does the mobile phone have an echo?
The sound of our horn is transmitted back to the microphone and then to the other side, so that the other side can hear its own voice. Each mobile phone has its own echo cancellation chip, and the chip and speaker microphone form an echo cancellation system. The echo cancellation chip modulates the speaker signal (that is, the electric signal amplified by power amplifier) through preset parameters to make it the same as the voice signal of the other party in the sound signal collected by the microphone, and then cancels it. So as to realize echo cancellation. If you can hear your voice on the phone. This means that there is something wrong with the echo cancellation system on the other side. It may be that the microphone is damaged, which leads to the failure of the preset parameters, or it may be that the parameters of the echo cancellation chip are changed by brushing or other operations, and the echo cannot be eliminated well.
What is the echo of my mobile phone?
It could be a signal. My mobile phone has a particularly loud echo in some places.
What's wrong with the echo of the phone call? How to solve it?
The reason for the echo of the mobile phone can be attributed to the problem of the mobile phone itself and the network:
1. There is something wrong with the design of the mobile phone itself. Usually, the echo problems caused by the mobile phone itself are mostly due to the poor isolation of the transceiver loop, which has little to do with the sealing of the fuselage. This is probably the design problem of the mobile phone itself. For example, the receiver of some mobile phones is too loud and the sensitivity of the microphone is too high, which causes the sound to return and cause echo. If your mobile phone has a long response during a call, this is probably the problem.
The most direct way to test whether your mobile phone causes echo for this reason is to talk with headphones. If there is no echo when using headphones, it means that the echo comes from a defective body design.
2. The network causes echo. This is mainly because the propagation of electromagnetic waves reaches your mobile phone through many ways, including various reflected or transit signals. Because the first path reaches the strongest signal, the mobile phone always processes this signal. However, the mobile phone will eliminate the delayed signal that reaches the mobile phone through other paths through some algorithm.
But sometimes there are many reflection paths and strong signals, so it is difficult for mobile phones to eliminate them by fixed algorithms, thus forming echoes. If the echo can be successfully eliminated by changing the location during the call, it means that the original multipath interference path has been changed, which means that the echo comes from the network rather than the mobile phone.
What's wrong with the echo of the phone call? How to solve it?
The reason of cell phone echo can be attributed to the problems of the cell phone itself and the network. The reasons for the mobile phone itself may include your own mobile phone and the other party's mobile phone. Echo in the network is a normal phenomenon, which is mainly caused by the following reasons:
How to solve the echo problem when making a phone call?
Methods/steps of echo problems caused by cell phone calls.
1. If you make a fixed telephone call, it is the echo generated by the conversion of the second and fourth lines of the fixed telephone subscriber line;
2. If you call a mobile phone, it is the echo caused by the delay of the wireless encoder;
There is something wrong with the design of the mobile phone itself. Usually, the echo problems caused by the mobile phone itself are mostly due to the poor isolation of the transceiver loop, which has little to do with the sealing of the fuselage. This is probably the design problem of the mobile phone itself. For example, the receiver of some mobile phones is too loud and the sensitivity of the microphone is too high, which causes the sound to return and cause echo. If your mobile phone has a long response during a call, this is probably the problem.
solution
1. Turn off your phone first. Then insert a thin wire into the earphone hole. The other end of that thread is held in the hand. The other hand touched the tap water pipe. Try to open it again after five seconds.
Note: When inserting the wire into the ear hole, don't use too much force. So as not to plug the components in the mobile phone. This method can only aim at the echo caused by too much static electricity in the mobile phone.
How to solve the echo problem when making a phone call?
2. Turn off the noise reduction function. After some mobile phones are turned off for noise reduction, the echo is really gone.
3. Many mobile phones that still have echo after turning off noise reduction can try to block the small hole next to the earphone hole, and some mobile phones have no echo after being blocked. You can try.
4. Some of them are echoes caused by poor signal. Try an open place and see if it's a signal. If it's a signal. Replaceable operator.
5. The design of the mobile phone itself. Can only return to the factory for repair.
What if there is an echo in the voice of the mobile phone?
Maybe your microphone is too sensitive, and the sound of speakers or headphones is relayed by the microphone. Try to turn down the microphone. If it doesn't work, try changing the headphone cable.
What happened when the phone called and the other party replied?
1, restart the phone.
2. Check whether there are obstacles in the mail delivery hole.
3. Call different contacts, is it all the same?
4. Is it a network coverage problem to replace other geographical location tests?
5. Try to replace the SIM card.
If the problem still exists, it is recommended to send the mobile phone for inspection and maintenance.
What should I do if my mobile phone has an echo?
If you can hear the echo of yourself or the other party when talking on your mobile phone, it is initially judged that it is a network problem. I suggest you:
1. Check whether the network signal of your mobile phone or the other mobile phone is stable. Please change your position and try in a place with strong signal.
2. If it is a Unicom 3G mobile phone, try to switch to the 2G network mode (Settings-More Settings-Mobile Network-Network Mode-GSM only).
If it is a 4G mobile phone, try to switch the network mode (Settings-Connect-More Networks-Mobile Networks-Network Mode -4G/3G/2G Network Mode or 3G/2G Network Mode).
Note: Some 4G mobile phones do not support switching network frequency bands.
3. Try to restart the phone.
4. Try to replace the mobile phone card.
5. Back up data (contacts, text messages, photos, etc. ) and try to restore the factory settings (Settings-Reset/Privacy-Restore Factory Settings).
Answer the phone. There's an echo. Why?
There is an echo when the mobile phone answers the phone General reasons:
1, network failure.
2, mobile phone microphone failure.
3. the 3.SIM card is faulty.
Chicken processing method:
1, restart the phone.
2. Check whether there are obstacles in the mail delivery hole.
3. Is it true to call different contacts?
4. Whether it is a network coverage problem instead of other geographical location tests.
5. Try to replace the SIM card.
If the problem still exists, it is recommended to send the mobile phone for inspection and maintenance.
Why does the mobile phone sometimes have an echo?
Environmental signals overlap. If you change the location, first consider the interference of the base station to the current environment. If you leave this area, the same problem remains. Consider whether there is an answer when you call everyone. If not, the problem with the mobile phone may be that you turned on the speaker! There may be something wrong with your speaker, or there may be interference from the speaker or receiver. If there is interference, try to change the environment. If there is, the receiver is broken. Are you on speakerphone? Network signal problem, cell phone problem. Check it. The receiver is broken.
Why do cell phones sometimes get an answer when calling?
The quality of the telephone. There is something wrong with the receiver. The previous mobile phone had such a problem. There are few mobile phones now. But if you put the speaker on the other side, there will be an echo.
- Related articles
- When was the reminder messageNo. 16 issued on the repayment date of Zhaolian Finance?
- Postal savings bank cards have SMS prompt service. Forgot to cancel, the fee has been deducted. I don't want it, what will happen!
- Valentine's Day SMS for Wife 20 19 Warm Valentine's Day SMS
- Expert opinion on funny profits
- Verification code of Jiuyou Can Jiuyou operators see the verification code sent?
- How to implement message push between java program and WeChat public platform
- Alibaba Cloud forms have no SMS verification.
- I can't let go of my predecessor, so I don't want to give up. I just want to leave now to help you.
- The account of Shanghai Pudong Development Bank has no card number for the time being.
- The SMS interface of the verification code was stolen. Do you?