Which is better—earplugs, earmuffs or a wadded up piece of paper napkin?

Foam earplugs offer more protection from noise than earmuffs—when they’re properly fit in the ear canal.

Answer Extra: 

It’s more about correct use than style: A poorly-fit foam earplug actually offers little or no protection from noise. And that piece of cocktail napkin you grabbed from the bar and moistened with saliva? A very, very distant third place.

source: 
source: www.howardleight.com