I like the idea because these text notifications - for anything, not just ultimate block - are frequently covered by map votes or just straight bugged into non-existence. I absolutely hate everything about the new message system, it is horrible. I support this idea, anything to reduce reliance on the messages.
Not to mention, it can be pretty easy to not immediately notice those messages when you're staring at your crosshair, and milliseconds can mean death.
OK so attached are the sounds that we could try to use. I have also made a poll at the top to vote for what you guys like.
I will make s similar thread for voting on a resurrect sound.
The poll allows for mutiple selections so you can pick all of the ones you like. The two with the most votes will then have a runoff vote to select the winning sound.