This is where the experts disagree! When asked how loud should white noise be for baby, the American Academy of Pediatrics has suggested the volume be set to no louder than 50 decibels (about as loud as a quiet dishwasher) to avoid potential hearing damage. However, many very well known pediatric sleep experts claim white noise doesn't have any effect on sleep when played at less than 60 - 65 decibels (about as loud as a running shower).