2 out of 1000 children are born deaf in the United States. More children will lose their hearing later on as they grow up. This can occur later on during childhood or as adults. Deafness is also the number one birth defect recorded in the United States.
100 Mind-Blowing Deafness Facts
Roosters have built-in earplugs, so they don’t deafen themselves when they crow. Anyone who’s ever spent a night outside the city knows one thing, and that’s the fact that roosters are loud! Researchers measured how loud roosters do crow and found them to be as loud as 140 decibels – well over the amount needed to cause permanent ear damage and even deafness. When they studied what happens when roosters crow, they discovered that in opening their jaw to crow, their outer ear canals close up, essentially giving them natural earplugs.