Several members of our hearing loop advocacy group have handed the attached business card to a cashier/receptionist/ticket agent with a mask on and have found people to be immediately empathetic and responsive. Sometimes you have to remind them to look at you when speaking, "Can I SEE you say that again?", but it will be a memorable and educational experience for them and should have some improved outcomes for you! And I agree, letting your seat partner know that you have trouble hearing announcements and asking them if would they please let you know if anything vital has been said will always be met with a good response. Chances are they won't hear it either, the sound systems are so bad!