Sound Monitors Protect Premature Babies

A sound level indicator of the Sonicu system hangs from the ceiling of the neonatal intensive care unit at Riley Hospital for Children in Indianapolis, Wednesday, March 19, 2008. The unit measures noise and displays a visual representation of measured sound levels. As decibels rise, the colors change from green to yellow to red, hushing chatty parents or doctors so the babies get the rest they need to develop. (AP Photo/Michael Conroy)