Why is a 100 person choir singing the same song not 100 times louder than one person?

Question

I suspect it’s something to do with sounds waves so have flaired as physics, but not sure?

In: 896

Answer 1

Also there’s a thing in choir singing about “if you hear yourself singing, you’re being too loud”
If you’re singing at the top of your lungs you’re now louder than everyone normal singing