Air filter question...

I was just wondering, would it be any louder if you had 2 air filters on the end of an intake instead of only one? My friend is gonna make his own and we didn't know if it would...I guess that's the type of thing you think about when you pick up a 3-way piece of PVC while walking around Lowes...:p

If it is louder at all, its not going to be much, at least i dont think so. Just out of curiosity, why is he putting 2 filters on it?

Well he's not going to, we just wondered whether or not it would be louder...or if it would help bring in more air, etc...