Do not worry one jot. I have a loud(ish) voice. It comes from being a singer in my youth, a Uni lecturer later and enthusiasm for what I am saying. I never needed a microphone to fill a room with song or the finer details of Income Tax (my subject) and it all stood me in good stead.
However, I have been told often (though kindly) to "keep your voice down a bit mum" when I am in a public area and telling someone about my new dentures or how much I admire my son-in-law. I simply say "Oops, sorry, I get a bit carried away" and then try to whisper the rest of my tale, which apparently is still pretty loud.
There's worse things a gran can do. Just be yourself, and have a laugh about it.
What's going on , on the street outside your home right now?
Desperately sad story of the assisted suicide of a grieving mother
. They are always telling me to Ssssh. I had no idea! 70 years old and no one every told me. I do not have a hearing problem so it's not that. Checking with my youngest and kindest daughter last night I asked her "Is it true?" She told me "Yes" I have a loud voice and make inappropriate comments which are embarrassing 



