Experts warn, children's headphones 'could be damaging their hearing,'! Researchers tested six headphones –from LilGadgets, to Peppa Pig, and JVC Tinyphones. When used with smartphones and tablets, most of them limited the volume to their claimed levels of 85. But Snuggly Rascals, hit 95 when connected to a tablet and around 100 decibels when attached to a laptop and CD player. Almost all of them, exceeded their advertised limit by at least three decibels when plugged into a laptop or CD player. Except for PuroSound and Kidz Gear!