Hmmm. It depends, so
When the red light turns on, you have about 3 seconds to stop. You wait a few seconds until you cant see it & hear it.
If the speakers turned on, while that was happening, as long as you don't reach 100 noise, you can hit the lever on the speakers to turn it off.
I'll check if there's a bug on my end though, just in case.
Question: Did it work the first time? Turning off the speakers?
It worked twice. The first time was to confirm which switch it was to shut it off so I wasn't mining at all. Second time was at 70~ish NOISE while I was mining. Third time I couldn't shut it off. I thought it was because I was at 80~ish NOISE and didn't have much time to shut it off before it reached 100. But the runs after that keeps me from turning the speaker off. I tried a new run but haven't reached the speaker warning again yet. I'll try again later, it's probably just my computer acting up instead of just a bug.