Disabilities come in many forms and not all are obvious. A white stick, crutches or a wheel chair are obvious but hearing aids these days are very unobtrusive.
Last year I had to admit that my hearing was getting worse and was fitted with hearing aids. While these do help in small groups and face to face, I am still struggling in larger groups and open spaces, and where there is a lot of background noise. This has been said by others with hearing aids too.
So on behalf of those of us with hearing problems please would you bear in mind that it is lovely to be in a group praying together or in a discussion group, if we can’t hear what is said it is somewhat isolating and inhibits participation (has someone said that already, what was that name, problem, date to remember). So please lift your head and possibly raise your voice so as to be heard by all. So speakers that is why we may not laugh at your joke, we didn’t hear the punch line!