My little girl of 3 is always complaining of loud noises when we are out and about. Hand dryers, fireworks, even a balloon popping. So far I have used these once at a county show. The same little girl stood watching a scottish pipe band march towards her, then turn directly in front without a comment or a moan. OK they are clearly not that good, so there is a placebo affect :-). Regardless of the method, they worked and lurid pink is perfect for her. They are small, fold up and are of a sturdy design. Great purchase. Only warning is that wandering children with these on do not respond to your normal voice commands, so keep a closer eye on them than normal.