This isn't a moan about their use or effectiveness, I know they are a necessary item at the moment but I find I struggle to understand what is being said to me by those using them. I much prefer people using a visor, although even they muffle sound.
I need to see facial expressions and mouth to understand what is being said.
I have auditory processing disorder and struggle with sounds/noise/direction. I find myself saying 'pardon' 'sorry, I didn't catch that' or plain 'what?' frequently. Its worse at work, retail worker.
I wonder how much people are being excluded from interactions because they need visual cues to participate fully.