Hi @Minhalindeza54, let me see if I can help out here.
Your post has been translated to English as this is an International forum, please post any replies in English and it will be easier for me and other users to assist you.
Have you been able to carry out a quick test of the speakers and the microphone? To do this, find and tap Settings > Support > Xperia Tests > Speakers and microphone. Also, make sure that the speakers are and the microphone are free from dust and grime.
Another thing that you can try is to reboot your phone to safe mode to see if the speakers and microphone works better there. All apps downloaded from Play Store is temporarily deactivated while in safe mode and by doing this, you can see if this behaviour is caused by a downloaded app. For more information on safe mode and how to use it, click here.
If the behaviour of the speakers and microphone persists in safe mode, I suggest that you try to repair the software using Xperia Companion. Keep in mind though that the software repair will erase all user data from the phone, so remember to do a backup first in order to prevent data loss.
Try these measures and let me know how it goes!
