I did take some earplugs with me to the American Idol concert, but I couldn't get them in my ears comfortably, so I just went through the concert with my fingers plugging my ears, which is what I did at the FM concert too off and on. It DOES filter out the dumb audience who won't shut the heck up (
) and also that "white sound" (can't explain it any other way), where you can actually hear the vocals better.