The speaker under note9pro is broken.

There is something wrong with the speaker under Xiaomi note9pro. First, determine whether it is a setup problem or a damaged speaker.

1. Clean the speaker and receiver first. It is easy to accumulate dust or grease during use. The sound will become smaller or hoarse after covering it. Clean the filter screen with a vacuum cleaner.

2. Check the application. The audio output by the application conflicts with the sound of the system, and the sound will become hoarse. Need to check the third-party app to see if there is background operation.

3. The speaker is broken. If you can't solve this problem by trying the above methods, you need to take it to the mobile phone store to check and confirm that it is a speaker problem, and solve it by replacing the speaker.