Q:

How to disable system sounds in Ubuntu 19.04?

I am wondering how to disable system sounds in Ubuntu 19.04. Although I have them muted in system settings, as you can clearly see in the screenshot below, they still keep on making sound and annoying me:

Whenever a system sound disturbs my calm a new entry under system sounds appears briefly with full volume and before I can change the volume to mute it, it's gone:

Can somebody enlighten me, please, how to mute all system sounds in Ubuntu 19.04 or Gnome 3.32 respectively. 

A:

This question has been answered here

To disable alert sounds on Ubuntu 19.04 you could install dconf
  editor, either from terminal or from activities/software center. From
  terminal
sudo apt install dconf-editor
Next, launch dconf editor and navigate to
  org/gnome/desktop/sound/event-sounds and flip the switch to off  
  alternatively, click on event-sounds and set custom value to False

