The timer display. Although if you listen really closely you can still hear it try to beep, but you have to be standing right next to it in a quiet room.
I was just joking microwave owens usualy are loud as fuck. And Then they add a loud BEEP like you didn’t hear the jet engine shut down aaargh + new BEEP every 30 seconds too for sure.
I figured lol. Mind you this one isn’t all that loud when it runs… mainly just fan noise that drowns out the hum unless the rotating plate starts squeeking and sings the song of its people.
I much prefer that over the old sound… always sounded like a 3 ton truck was backing up in the kitchen when it went off.