Can hand dryers damage kids' hearing? Nora Keegan, 13, measured the decibel level of a traditional hand dryer with a sound meter to see if damage may be occurring to people, particularly kids who stand even with a dryer. Nora decided to investigate after she says she noticed ringing in her own ears after using a dryer. So what did she find? "Many hand dryers are always above 110 decibels," Nora told Inside Edition. That's about the average sound level of a rock concert.