Giving Newborns the Quiet Time they Need Designed specifically for premature babies, Natus MiniMuffs Noise Attenuators protect their sensitive ears, and provide a safe environment for healthy development. Provides a "Quiet Hour" for Premature Babies in the NICU Helps meet American Academy of Pediatrics guidelines for safe noise levels in the NICU1 Reduces sound levels by at least 7 decibels (dB)1 Results in a reduction of sound pressure level of more than 50%