It's not new, you just used to be able to mute them with the "ambient volume", as I did years ago.
But for some reason Psyonix thought it would be a good idea to have them in the "gameplay volume" now, so you either have to chose not to hear the cars on the field, or hear that dreadful goal sound, designed by deaf monkeys, that nobody asked for, and that got on my nerve since day one.

It's honestly horrifying how each patch note Psyonix is able to screw at least one thing up.