A fart that serious wouldn't seem real, and that goes double if it appears that you unmuted specifically to make the noise. Just tell people it was a soundboard.
You'd rather be the person who decided to randomly unmute to share your actual factual filthy self? At least a soundboard is just a poorly judged joke (that actually landed, if the teacher laughed). Or you can be a fart pervert.
Honestly the teacher laughing was enough, literally no one is going to give a fuck after that.
People need to realize that they are not the main character, if you want something embarrassing you did to go away just donât bring it up. People arenât jotting down notes to bring up later, they have full lives of their own, no one in college has time to commit this to memory any more than a funny anecdote and they wonât bother to remember who did it.
Counterpoint: I still vividly remember a guy ripping a fart in class more than 20 years ago. Maybe because we've been writing a test and, up until that point, the classroom had been deadly silent before bursting into laughter.
Or maybe because he did it again, a couple of days later.
I'd always heard if you're presenting in front of a crowd and rip a fart, say something to the effect of "I was hoping to finish with a bang, not start with one." But I'm not sure how relevant that is for OP's situation.