Why do tenors need two microphone?
Tenors might need two microphones because their voice is high and might be overpowered by other voices. They might also need two microphones if there is imbalance. That is, if they are fewer than the others.
two times the sound lol
I'd imagine they make so much noise and it doesn't really go straight, but instead it scatters around so two microphones picks up more of it around.