(which I probably won’t understand the answer to, but I’ll ask anyhow.)
So the human voice can yell at 100 decibles, more or less (This site gives the “loudest human scream” at 128), so 100 is certainly possible.)
If 2 people yell at 100 decibels, they don’t produce a sound that measures 200 decibels, right? It’s not additive. Are they *any *louder than 1 person alone? If so, why? What’s amplifying the sound once it comes out of their mouths?
And why are stadiums so loud? Why are 10,000 people yelling together much, much louder than 1 person yelling alone?