Software Updates notification sound(s)

I’m not sure if this is in the correct forum, please move if not…

I was wondering if there is a way to silence those annoying sounds when the “Software Updates” app (is it still “Apper”?) pops up. It works fine, I just hate that sound it makes.

Edit: I’m using Plasma 5 desktop

I don’t use the updater at all, but IIRC check the settings in

systemsettings5 > Notifications > Plasma Shell…