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 caused a reverberation. 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.

1. Why does the mobile phone have an echo?

A:

1. If you make a fixed telephone call, it is the echo caused by the conversion of the second and fourth lines of the fixed telephone subscriber line.

2. If you make a cell phone call, 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 there is a long response from your mobile phone during the call, this is probably the problem? Title.

4. 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.