I pretty much never go outside without headphones now. I haven’t noticed any problems with comprehending speech or sounds like described here. Sensory issues (as in being easily overwhelmed) were long gone before I got addicted to headphones. However, mother complains I am constantly speaking too loud without even recognizing it, and blames it on my hearing loss. However, I KNOW my hearing is good, because I can still hear a subtle shrill sound of a power supply on the other end of the room, even loudly enough to be bothered by it! I wonder if this could be because of headphones, that just feels peculiar.