"whether someone said something during their birth. Generally, people remember very little from their first years" You're missing the context here. Babies don'

"whether someone said something during their birth. Generally, people remember very little from their first years" You're missing the context here. Babies don't understand speech, so it's not like words are going to matter. And this has nothing to do with 'memories'. Loud noises, unnatural humming sounds like vehicles, the constancy of it all - is highly unnatural. The possibility that hormones can alter our development is implied in the article, it's not entirely unreasonable that other stressors can affect us as well. We were 'designed' to come into a very quiet world (granted, it was a rugged place) but it was audibly very quiet. Since all of us - adults, children, react in a variety of ways to sound (stressing, soothing etc.) I suggest that audio, in the very earliest phases of one's life can possibly be a stressor.