You already have built in hearing protection so you don't need to buy the expensive earplugs at the airshow, right? You have natural earplugs installed at the tips of both index fingers. But manually holding your ears makes it terribly difficult if you are also trying to capture pictures or video or eat or if you're just trying to enjoy yourself.
photo by Christine Dollase
So don't forget your hearing protection.
I SAID DON'T FORGET YOUR HEARING PROTECTION ! !