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

Quick take: they are trying to hit the same frequency or multiples thereof. A greater number of disparate frequencies and non-multiple frequencies is perceived as louder because there is more noise filling the range of percievable frequencies.