Here are some recent findings about about ‘the hidden lost audition ’
” Conventional wisdom says that damage to our hearing is an age-related phenomenon. But researchers caution that in a noisier world, chances are that more people, at younger ages, will begin to exhibit signs of hearing loss, hidden or otherwise. ”
https://elemental.medium.com/you-might-be-losing-your-hearing-and-you-dont-even-know-it-b621f6b4aadd
“You can have this hidden audition loss by being exposed to sounds that we don’t necessarily consider traumatic,” . The sound levels on a city street aren’t thought of as traumatic, but they can be enough.