The ant camera can't hear each other.

First, the most common thing is not to turn on the volume.

Second, the speaker is broken. This situation needs to be repaired in a repair shop. Generally speaking, it is best to go back to the factory for maintenance, not in a small shop to prevent the other party from replacing parts.

Third, software failure, audio driver damage.

Fourth, there is no sound in multimedia. Just turn the multimedia to the maximum.

Fifth, there are other reasons, such as the sound shortcut key in the notification bar being turned off, and so on, which can be solved by yourself.