I have ASD and auditory processing disorder. I can only understand people who speak really clearly and I use lip reading a lot to understand what people are saying. Recently, I've had a few embarrassing encounters where people with masks or visors on in shops etc have tried to make small talk with me and I have no idea what they've said. In the moment, I'm not able to say that I can't understand them. I need a non-verbal way to communicate to people that I'm not intentionally being rude if I don't respond, I just can't tell what they're saying. Does anyone have any inspired solutions?