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

Loudness of a sound is basically it’s amplitude(in simple words how big waves it makes) .when 100 people sing together the sound(which is vibrations) increase but the amplitude is not increasing hence it does not get louder.