Most modern microwaves have a silent mode. Try holding down the 2 button until it beeps.

my microwave beeps if you hit the cancel button. it makes me avoid using it.

There was an observatory that was picking up these mysterious spikes in radiation that they couldn’t explain. They thought it might be something new but couldn’t see any events on other spectrums that would go along with this random event.

Eventually they figured out that the spikes were caused by people opening the microwave in the break room while it was still going.

So I don’t do that anymore after hearing that story.